Dr
John Durrell
(University of Cambridge)
29/06/2015, 08:15
In 2003 Tomita and Murakami set the record for the trapped field in a bulk superconductor of a shade over 17.2 T. Last year, not without significant effort, this record was raised to 17.6 T. This apparently slow progress may suggest that the pace of progress in Bulk Superconductors has been very slow. In fact nothing could be further from the truth. The growth of bulk materials from (RE)BCO...
Hirokazu Hirai
(Taiyo Nippon Sanso Corporation)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
Approaching to commercializing of High Temperature Superconducting (HTS) power applications is becoming more active. And cooling system is very important and essential for practical HTS power applications. HTS power applications on commercial scale will require cooling system which has cooling capacity from 2kW to 10kW at 65K, high reliability (long maintenance interval) and compactness. Taiyo...
Dr
Leslie Bromberg
(MIT - Plasma Science and Fusion Center), Dr
Philip Michael
(MIT - Plasma Science and Fusion Center)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
Cryogenic system complexity presents a major challenge to the implementation of superconducting technologies. At MIT, we have developed concepts to simplify the cryogenic environment for superconducting rotating machinery, such as HTS motors and generators. We present cooling schemes for the rotor of a high-speed rotating machine that avoid the use of rotating cryogenic seals, which are...
Masataka Iwakuma
(Kyushu University)
29/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
In Japan, we have developed 3φ-66/6.9kV-20MVA RE1Ba2Cu3O7-δ(RE:Rare Earth, Y, Gd and so on, REBCO) superconducting transformers with a current limiting function as a national project. First we made a basic research on the ac loss reduction and the enhancement of current capacity of REBCO superconducting tapes, the dielectric strength of liquid nitrogen, a current limiting function of REBCO...
Johan Bremer
(CERN)
29/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
A proposal for a very large liquid argon (40 kt) based neutrino detector is being studied. To validate the design principles and detector technology, and to gain experience in the development of the cryostats and the cryogenic systems needed for such large experiments, several smaller scale installations will be developed and implemented, at Fermilab and CERN.
A small-scale prototype (35 t)...
Mr
Przemyslaw Smakulski
(Wroclaw University of Technology)
29/06/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Liquid cryogens cooling by direct contact with cooled surface is very often use as a method to drop the temperature of the devices or equipment i.e. HTS cables. Somehow, cool down process conducting in that way could not be optimized, because of cryogen pool boiling characteristic and low heat transfer coefficient. One of the possibility of increase the efficiency of heat transfer, as well the...
Mr
Marinco Lefevere
(Demaco), Mr
Ronald Dekker
(Demaco), Dr
Ruud Woude van de
(Demaco)
29/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Feed and End caps are connection boxes between Helium transfer lines and Cryomodules of the European XFEL project at DESY.
Feed and End caps are characterised extreme narrow dimensional tolerances at the Cryomodule interface, in order to keep the XFEL linac beam pipe aligned perfectly during cryogenic operation.
The expected movements of the beam pipe and process pipes due to pressure...
Mr
Nathaniel Laverdure
(Jefferson Lab)
29/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
The MSU-FRIB cryogenic distribution system supports the 2 K, 4 K, and 35 K operation of more than 70 loads in the accelerator and the experimental areas. It is based on JLab and SNS experience with bayonet-type disconnects between the loads and the distribution system for phased commissioning and cryomodule maintenance. The linac transfer line, which features three separate transfer line...
Mr
Thomas M. Kochenburger
(Karlsruhe Institute of Technology, Institute for Technical Thermodynamics and Refrigeration)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
High-temperature superconductors offer new perspectives for efficient transportation of electrical energy in urban and industrial power grids. The size of the components is in many cases limited by the available refrigeration technology. In the operating temperature range of 65 – 70 K, cooling is presently achieved by liquid nitrogen, turbo-Brayton plants or batteries of regenerative...
Mr
Hiten Vaghela
(ITER-India, Institute for Plasma Research)
29/06/2015, 09:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
The ITER cryoline (CL) system is part of overall ITER cryogenic system involving the cryoplant and the cryodistribution. The CLs are complex network of vacuum-insulated multi and single process pipe lines, distributed in three different areas at ITER site. The conceptual design phase of the lines has been completed and the detailed design, fabrication and installation will be performed by...
Dr
Milan Majoros
(The Ohio State University)
29/06/2015, 09:00
ICMC-08 - Superconductor Stability and AC Losses
Poster Presentation
High energy physics (HEP) magnets require high magnetic fields, demanding the use of new superconducting materials. YBCO coated conductors are of interest in a number of possible HEP applications, including high field solenoids for muon colliders. The temperature distribution, quench, the normal zone propagation, and conductor protection are highly important in these applications. In the...
Prof.
Junjie Wang
(Technical Institute of Physics and Chemistry, CAS), Mr
Liubiao Chen
(Technical Institute of Physics and Chemistry, CAS), Mr
Sixue Liu
(Technical Institute of Physics and Chemistry,CAS)
29/06/2015, 09:00
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
Some single-stage high-frequency pulse tube cryocoolers (HPTCs) have been developed in recent years. At present, with an electric input power of 250 W and a frequency of 30 Hz, the lowest temperature achieved is around 15 K and the typical cooling capacity is about 350±50mW/ 20 K. Although single-stage is more attractive to customers compared with multi-stages because of its mechanical...
Wolfgang Stautner
(GE Global Research)
29/06/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Thermoacoustics in cryogenics continues to be a very interesting phenomenon which is still poorly understood but often experienced unexpectedly in experiments where it causes unacceptable heat leaks. The authors report on the appearance and onset of this unwanted occurrence at temperatures below 1 K. Based on experiments, quantitative measurements of the heat leak caused by these pressure...
Timothy Haugan
(U.S. Air Force Research Laboratory)
29/06/2015, 09:00
ICMC-10 - Flux Pinning and Critical Current
Poster Presentation
Addition of second-phase nanosize defects to YBa2Cu3O7-z(YBCO) superconductor thin films is known to enhance flux pinning and increase current densities (Jc). The addition of Y2BaCuO5 (Y211) was studied previously in (Y211/YBCO)N multilayer structures, and in Y211+YBCO films deposited from pie-shaped targets. This research systematically studies the effect of Y211 addition in thin films...
Timothy Haugan
(U.S. Air Force Research Laboratory)
29/06/2015, 09:00
ICMC-10 - Flux Pinning and Critical Current
Poster Presentation
Adding nanophase defects to YBa2Cu3O7-z (YBCO) superconductor thin films is well-known to enhance flux pinning; resulting in an increase in current density (Jc). While many previous studies focused on single phase additions, the addition of several phases simultaneously shows promise in improving current density by combining different pinning mechanisms. This paper encompasses the effect of...
Seok-Cheol Ko
(Kongju National University)
29/06/2015, 09:00
CEC-08 - Cryogenic Power Cables and Leads
Poster Presentation
In this study, a superconducting fault current limiter (SFCL) with two magnetic paths using E-I iron core was proposed and its peak current limiting characteristics were analyzed. For the suggested SFCL to effectively perform the peak current limiting operation, the design of the SFCL considering its electrical equivalent circuit for E-I iron core was needed. In addition, the analysis on the...
dong XIA
(Chinese Academy of Sciences)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
The magnetic induction intensity of superconducting generator can reach a few Tesla, relative to the conventional generator, it has small volume and weight, compact structure, high power density and efficiency, big ultimate capacity, good stability, so superconducting generator is regarded as one of the attractive and novel generator with business competitiveness in the near...
Dr
Takakazu Shintomi
(KEK)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
From the point of view of environment and energy problems, the renewable energies have been attracting attention. However, fluctuating power generation by the renewable energies affects the stability of the power network. Thus, we propose a new electric power storage and stabilization system, Advanced Superconducting Power Conditioning System (ASPCS), which consists of a Superconducting...
Dr
Yong-Ju Hong Hong
(Korea Institute of Machinery & Materials)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
The Superconducting Fault Current Limiter (SFCL) is an electric power device which limits the fault current immediately in a power grid. The SFCL must be cooled to below the critical temperature of HTS(High Temperature Superconductor) modules. In general, they are submerged in sub-cooled liquid nitrogen for their stable thermal characteristics of HTS modules. To cool and maintain the target...
Pei Li
(Fermi National Accelerator Laboratory)
29/06/2015, 09:00
ICMC-08 - Superconductor Stability and AC Losses
Poster Presentation
Quench initiation and growth in high-field Bi-2212 magnets can be described by 3-D heat diffusion equations and well simulated using modern finite element modeling tools. However, the usefulness of this simulation is often limited by the lack of good physical properties of important components, such as the magneto-resistivity of silver and silver alloys in a heat-treated commercial wire,...
Ho-Myung Chang
(Hong Ik University)
29/06/2015, 09:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
Recent progress in the development of a 10 kW Brayton cryocooler is presented for HTS cable systems under installation in Jeju Island, Korea. The role of this cryocooler is to continuously cool a liquid-nitrogen flow from 78 K to 67 K, and the liquid is pumped to three-phase 154 kV cable over a length of 1 km. The refrigerant of cryocooler is helium, whose operating pressure and flow rate was...
Liyang Ye
(Fermi National Accelerator Laboratory)
29/06/2015, 09:00
ICMC-08 - Superconductor Stability and AC Losses
Poster Presentation
One of the remaining challenges for high temperature superconducting magnets is quench protection. To develop an effective quench protection system, it is important to understand the conditions that must be avoided during a quench so that the conductor is not degraded. Our previous study on Ag/Bi2212 round wires has shown that the quench degradation is a strain-driven effect and strongly...
Chris Kovacs
(Ohio State University)
29/06/2015, 09:00
ICMC-08 - Superconductor Stability and AC Losses
Poster Presentation
S.S. Cored 27-strand Nb3Sn Rutherford Cable was pressed onto a U-shaped holder and kept at magnet-relevant conditions throughout reaction, instrumentation, epoxy-impregnation, and measurement. Current was injected into a single strand of the cable under applied fields up to 15 Tesla and with varying I/Ic. Then, a graphite-paste heater pulse was used to initiate current sharing. ICR and...
Angela Krenn
(NASA)
29/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Large Liquid Hydrogen (LH2) storage tanks are vital infrastructure for NASA. Eventually, air may leak into the evacuated and perlite filled annular region of these tanks. Although the vacuum level is monitored in this region, the extremely cold temperature causes all but the helium and neon constituents of air to freeze. A small, often unnoticeable pressure rise is the result. As the leak...
Ralf Eichhorn
(Cornell University)
29/06/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Managing parallel cryogenic flows has become a key challenge in designing efficient and smart cryo-modules for particle accelerators. In analyzing the heating dynamics of the cornell high current injector module a power-full computational tool has been set-up allowing time resolved analysis and optimization. We will describe the computational methods and data sets we have used, report the...
Prof.
HEMANT NAIK
(S. V. National Institute of Technology)
29/06/2015, 09:00
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
Transient analysis of single stage GM type double inlet pulse tube cryocooler is carried out using a one dimensional numerical model based on real gas properties of helium. The model solves continuity, momentum and energy equation for gas and solid to analyse the physical process occurring inside of the pulse tube cryocooler. Finite volume method is applied to discretize the governing...
Mr
Hitensinh Vaghela
(ITER-India, Institute for Plasma Research)
29/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
System of cryoline and cryodistribution for ITER has matured to a stage of preliminary design phase with the advent of industrial associates. Starting from the cold power source, the system of cryoline and cryodistribution transfers the controlled cold power through a large network to the superconducting magnets and cryopumps. The functional responsibility also includes very high reliability...
Stefanie Langeslag
(CERN)
29/06/2015, 11:00
ICMC-14 - Cryogenic Materials Testing and Methods
Invited Oral Presentation
Mechanical testing of materials at low temperatures is one of the cornerstones of the Mechanical and Material’s Engineering (MME) group at CERN. A long tradition of more than 20 years and a unique know - how of such tests has been developed with a 18 kN double-walled cryostat. Large campaigns of material qualification have been carried out and the mechanical behavior of materials at 4 K has...
Danko van der Laan
(Advanced Conductor Technologies)
29/06/2015, 11:00
Advanced high-energy physics magnets, high-field research magnets and fusion reactors require the development of high-temperature superconducting cables for magnetic fields exceeding 20 T, or allow for operating temperatures above the boiling point of liquid helium. Using ReBCO coated conductors, Advanced Conductor Technologies is developing Conductor on Round Core (CORC) cables that will...
James Butterworth
(Air Liquide Advanced Technologies)
29/06/2015, 11:00
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
Air Liquide has been working with ESA, CEA and Thales Cryogenics since 2010 to design, manufacture and test a 15K Pulse Tube Cooler system.
This cooler is particularly adapted to the pre-cooling needs of cryogenic chains designed to reach 0.1-0.05K for focal plane cooling on scientific space missions such as ATHENA.
The cooler is designed to provide cooling power >0.3W at temperatures from...
Robert Duckworth
(Oak Ridge National Laboratory)
29/06/2015, 11:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
To pump the ITER torus exhaust gas from the regenerating torus cryopumps, which will be a mixture of deuterium, tritium, and helium with trace impurities, a prototype cryoviscous compressor (CVC) has been designed, fabricated, and is under test. This prototype, which was based on success ful demonstration of a sub-scale version, consists of a set of 24 5-cm diameter, 1.27-m long stainless...
Michael Green
(Lawrence Berkeley Laboratory)
29/06/2015, 11:00
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
This author and other authors have written papers concerning the cost of refrigeration at liquid helium temperature and higher temperature as a function of the refrigeration delivered. These papers have included small coolers as well. The lowest temperature range from 4.2 K to 4.7 K (the liquid helium temperature range) is covered using coolers that have two stages. The use of magnets and...
Dr
Mark Kimball
(NASA/Goddard Space Flight Center)
29/06/2015, 11:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
The adiabatic demagnetization refrigerator (ADR) developed for the Astro-H Soft-Xray Spectrometer (SXS) is a multi-stage solid-state cooler. It is capable of holding the SXS detector array at 0.050 K for greater than 24 hours with a recycle time of less than one hour. This quick recycle time relies upon high-conductivity thermal straps to couple the individual stages to a pair of heat switches...
Mark Kimball
29/06/2015, 11:15
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
The Soft X-ray Spectrometer (SXS) destined for the Japanese Astro-H mission contains a 6x6 array of microcalorimeters. To achieve ultimate resolution the array must be electrically isolated from the rest of the instrument as well as cooled to 0.050 K. The latter is achieved by directly coupling it to the coldest stage of a multi-stage Adiabatic Demagnetization Refrigerator (ADR). Thus, the...
Mr
Lutz Decker
(Linde Kryotechnik AG)
29/06/2015, 11:15
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Contributed Oral Presentation
In the past, cooling at 2K used to be an exotic application in large scale cryogenics. The required sub-atmospheric helium bath was established with the help of one of the following two technical approaches – rough vacuum pumping at ambient temperature or turbo compression at cryogenic temperature – or a combination of both. The aforementioned approaches are still being applied, but the...
Michael Green
(Michigan State University)
29/06/2015, 11:15
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
The amount of cooling delivered to the second stage of a two stage cooler is dependent on the second stage temperature and the amount of refrigeration provided by the cooler first stage. The second stage cooling as a function of temperature for a Cryomech PT415 cooler (1.5 W at 4.2 K with 42 W on the first stage) has been estimated by scaling similar data that was measured for a Cryomech...
Dr
Agnieszka Piotrowska
(Wroclaw University of Technology)
29/06/2015, 11:30
Closed cycle Joule-Thomson (J-T) refrigerators supplied with gas mixtures are perspective coolers in many applications requiring low-cost and reliable sources of cooling power below 100 K. They are characterized by relatively simple construction and lack of moving parts working at low temperatures. The refrigerants are composed of nitrogen and hydrocarbons. Working pressure can as low as about...
Nakano Kyousuke
(Sumitomo Heavy Industries, Ltd.)
29/06/2015, 11:30
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
For the wide spread of high-temperature superconductor (HTS) devices, a cryocooler having COP of >0.1, compact size, light-weight, high efficiency and high reliability is required. For practical use of superconductive devices, especially HTS motor used for electric vehicle. We developed a high efficiency Stirling pulse-tube cryocooler (STP). STP has high reliability and low vibration. However...
Patrick Champagne
(Lockheed Martin)
29/06/2015, 11:30
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
This paper describes the development and testing of a space-quality compressor capable of delivering closed-loop gas flow with a high pressure ratio, suitable for driving a Joule-Thomson cryocooler. The compressor is based on a traditional “Oxford style” dual-opposed piston compressor with linear drive motors and flexure-bearing clearance-seal technology for high reliability and long life. ...
Gonçalo Tomás
(LIBPhys, Physics Department, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa)
29/06/2015, 11:30
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
The development and characterization of new materials is of extreme importance in the design of cryogenic apparatus. Recently the Versarien company developed a technique capable of producing copper foam with controlled porosity and pore size. Such porous materials could be interesting for cryogenic heat exchangers as well as of special interest in some cryogenic devices for microgravity...
Mike Sumption
(The Ohio State University)
29/06/2015, 11:30
Cable magnetization leads to field errors in precision beam-line accelerator magnets. These errors are particularly problematic at the injection field, both in their base value, as well as their temporal drift. Drift in NbTi cable magnetization is due to the influence on strand magnetization of the decay of long-range coupling currents. But with HTS cables and magnets, a new drift mechanism...
Dr
Richard Reed
(Cryogenic Materials, Inc.)
29/06/2015, 11:30
ICMC-12 - Insulation and Impregnation Materials
Contributed Oral Presentation
The thermal contraction from room temperature to 4 K of electrical insulation materials has been measured using a modified Invar 36 rod-in-tube dilatometer.The test assembly permitted independent measurement, simultaneously, of two samples. This permitted the use of a reference and an insulation sample for each thermal run. Materials that were measured included a conventional epoxy resin,...
Adam Swanger
(NASA Kennedy Space Center)
29/06/2015, 11:45
ICMC-14 - Cryogenic Materials Testing and Methods
Contributed Oral Presentation
An apparatus and method for the low-temperature mechanical training of shape memory alloys has been developed. The shape memory alloy (SMA) materials are prototypes being developed for novel thermal management systems in future cryogenic applications. Alloys providing two-way actuation at cryogenic temperatures are the chief target. The mechanical training regime was focused on the controlled...
Dr
Jens Höhne
(Pressure Wave Systems GmbH)
29/06/2015, 11:45
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Contributed Oral Presentation
Pressure Wave Systems GmbH has developed an oil-free compressor for GM and pulse tube cryocoolers. The concept is based on hydraulically driven metall bellows which compress the Helium working gas. The system has 1kW of electrical input power and has been successfully tested with a SHI SRDK-101D GM cryocooler cold head.
Set-up, performance and reliability of the compressor system will be discussed.
Mr
Jean-Marc duval
(CEA)
29/06/2015, 11:45
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
SAFARI (SpicA FAR-infrared Instrument) is an infrared instrument planned to be part of the SPICA (SPace Infrared telescope for Cosmology and Astrophysics) Satellite. It will offer high spectral resolution in the 30 – 210 µm frequency range. SAFARI will benefit from the cold telescope of SPICA and to obtain the required detectors sensitivity, a temperature of 50 mK is required. This...
Mr
Jun Watanabe
(Kyoto University)
29/06/2015, 11:45
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
In this paper, we try to develop highly efficient Stirling-type cryocooler for the next generation drive motor. Target motor is a High Temperature Superconducting Induction/Synchronous Motor (HTS-ISM). Although basic structure of HTS-ISM is almost the same as that of the conventional squirrel-cage induction motor, it can rotate at synchronous speed by use of the superconducting rotor windings....
Mr
Peter Bradley
(NIST)
29/06/2015, 11:45
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Micro-scaling cryogenic refrigerators, in particular the Joule-Thomson (JT) variety requires very good information about heat transfer characteristics of the refrigerants flowing in the microchannel for optimal design and performance. There are numerous studies regarding heat transfer coefficient measurements of liquid flow in microchannels at/near ambient temperature and high Reynolds flow...
Prof.
QUAN LI
(University of Edinburgh)
29/06/2015, 11:45
Offshore renewable energy, such as wind, tidal and wave energy, represents a potential solution to the future energy demand, while the world’s energy consumption continues to grow rapidly and the production of both oil and gas is waning. Serious consideration has been given to the development of offshore wind farms, particularly in Europe, North America and Asia. Many projects have been...
Gerard VERMEULEN
(Institut Neel (CNRS))
29/06/2015, 12:00
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
Institut Néel - CNRS and Air Liquide are presently developing a Closed-Cycle Dilution Refrigerator for Space. Recent sub-system level tests have demonstrated the operation of the low temperature components : the mixing chamber can provide close to 1µW at 50mK, the Still (in which the phase separation between liquid and gas occurs) can confine the liquid against gravity, and 4He can be...
Stefanie Langeslag
(CERN)
29/06/2015, 12:00
ICMC-12 - Insulation and Impregnation Materials
Contributed Oral Presentation
The development of new generation superconducting magnets for fusion research, such as the ITER experiment, is largely based on coils wound with so-called ‘cable-in-conduit’ conductors. These cable-in-conduit conductors consist of various types of stainless steel jackets, densely filled with superconducting strands based on either Nb3Sn or NbTi, and subsequently compacted. The concept of the...
Lukas Graber
(Florida State University)
29/06/2015, 12:00
Past efforts of cooling high temperature superconducting (HTS) power cables by gaseous cryogens focused exclusively on helium [1]. We are working on exploring the benefits of gas mixtures containing helium with small amounts of hydrogen and neon gas to mitigate the limited dielectric strength of pure helium gas. This could potentially improve dielectric characteristics while maintaining the...
Mr
Chris Rista, P.E.
(Barber-Nichols Inc.)
29/06/2015, 12:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Contributed Oral Presentation
The ITER cryodistribution system provides the supercritical Helium (SHe) forced flow cooling to the magnet system using cold circulators. The cold circulators are located in each of five separate auxiliary cold boxes planned for use in the facility. Barber-Nichols Inc. has been awarded a contract from ITER-India for engineering, manufacture and testing of the Toroidal Field (TF) Magnet Helium...
Ram Dhuley
(Florida State University)
29/06/2015, 12:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Linear accelerators (LINACs) using superconducting radio frequency (SRF) technology comprise of a long string of SRF cavities housed in discreet cryomodules. This cavity string is operated immersed in liquid helium (LHe) with high vacuum on its inside. Sudden loss of this cold vacuum to surrounding atmosphere perceivably is the worst failure mode of the LINAC. An accidental rupture at any...
Arend Nijhuis
(University of Twente)
29/06/2015, 12:15
ICMC-04 - MgB2 Processing and Properties
Contributed Oral Presentation
An International Collaboration for Advancement of Magnesiumdiboride Superconductors (ICAMS) has been initiated to develop MgB2 superconductors for fusion reactor magnets. Today NbTi is the undisputed superconductor for use in the Poloidal Field coils (PF), Correction Coils (CC), graded Toroidal Field (TF) coils and Feeders of a fusion machine. A major advantage of MgB2 is it’s higher...
Mr
Mark Haynes
(Composite Technology Development)
29/06/2015, 12:15
ICMC-14 - Cryogenic Materials Testing and Methods
Contributed Oral Presentation
Liquid propellant tank insulation for space flight requires low weight as well as high insulation factors. Use of Spray-On Foam Insulation (SOFI) is an accepted, cost effective technique for insulating a single wall cryogenic propellant tank and has been used extensively throughout the aerospace industry. Determining the bond integrity and the SOFI’s ability to withstand the strains, both...
Marcel ter Brake
(University of Twente, The Netherlands)
29/06/2015, 12:15
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
A sorption-based helium-3 pump is developed to be incorporated in a closed-cycle dilution refrigerator (CCDR) that is realized by the Néel institute in Grenoble. This CCDR is to be used for future long-lifetime space missions requiring a cooling power of the order of 1 microWatt at typically 50 mK for at least 5 years. A crucial component in this zero-gravity dilution refrigerator is a pump to...
Ms
Jordan Armstrong
(Glacier Technical Solutions, Air Force Research Laboratory)
29/06/2015, 14:00
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
The Air Force Research Laboratory (AFRL) Spacecraft Component Thermal Research Group has been devoted to evaluating lifetime performance of space cryocooler technology for over twenty years. Long-life data is essential for confirming design lifetimes for space cryocoolers. Continuous operation in a simulated space environment is the only accepted method to test for degradation. AFRL has...
Timothy Haugan
(U.S. Air Force Research Laboratory)
29/06/2015, 14:00
ICMC-15 - Cryogenic Low and High Power Electronics
Poster Presentation
Superconducting magnetic energy storage (SMES) devices offer attractive and unique features including no theoretical limit to specific power, high cycling efficiencies and charge/discharge rates, and virtually no degradation with cycling. The mass specific energy density (MSED) of SMES systems; however, falls short of many needs. This paper examines SMES energy densities of solenoid-type...
Mr
Patrick Adam
(Washington State University)
29/06/2015, 14:00
Liquid hydrogen storage systems utilize various insulation methods that have direct bearing on the mass and overall volume of the tank which can be inversely related. When utilizing liquid hydrogen as a fuel source for fuel cells, the vaporized fuel must be warmed to minimize ice build-up on fuel lines and to ensure compatible temperatures with fuel cell membranes. Advances in 3D printing...
Dr
Ibrahim Kesgin
(Argonne National Laboratory)
29/06/2015, 14:00
Undulators are very important insertion devices for storage ring and free electron laser based light sources to produce high-brilliance hard X-ray photon beams. NbTi based superconductive undulators (SCUs) have been recently developed and shown to reach higher on-axis peak fields compared to the field values achieved with conventional undulators. However, cooling NbTi coils to 4.2 K requires...
Mr
Hitensinh Vaghela
(ITER-India, Institute for Plasma Research)
29/06/2015, 14:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
Cold circulators, part of ITER Cryo-distribution system, have now reached to a stage of final qualification to demonstrate the design to cater the maximum mass flow and operational demands of the toroidal field (TF) superconducting magnet of ITER with a very high isentropic efficiency. The design of the TF cold circulators are now complete, gratifying additionally the operational requirements...
David Montanari
(Fermi National Accelerator Laboratory)
29/06/2015, 14:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
A new collaboration is being formed to develop a multi-kton long baseline neutrino experiment that will be located at the Surf Underground Research Facility (SURF) in Lead, SD. In the present design, the detector will be located inside a cryostat filled with 40 kton of ultra pure liquid argon (less than 200 parts per trillion of oxygen equivalent contamination).
To qualify membrane...
Maxim Marchevsky
(Lawrence Berkeley National Laboratory)
29/06/2015, 14:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Testing of high-field superconducting accelerator magnets aims at identifying potential causes of quenching, localizing quench origins and measuring quench propagation velocity along the coil winding. This information is essential for establishing protection limits and providing useful feedback to the magnet designers. Traditionally, quench studies are conducted using voltage taps. However,...
Chen Huang
(Zhejiang University)
29/06/2015, 14:00
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
Multi-stage Stirling pulse tube cryocoolers (SPTC) have great potentials in liquid helium temperatures applications with advantages of high reliability, low vibration, and convenience of stage coupling for lacking cold moving parts.
Studies have shown that performance of GM type pulse tubes working at liquid helium temperatures can be improved by introducing DC flow, which decreases...
Marcel Klaus
(Technische Universitaet Dresden)
29/06/2015, 14:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
High-energy neutrons are being decelerated by passing through supercritical parahydrogen circulated by pumps in a closed loop. Fluctuations in neutron heat load cause changes of the circuits’ local and average temperature and hence significant pressure variations if it is not taken care of the nearly incompressible behavior of hydrogen. Solutions by adding a variable volume in form of a helium...
Mr
Wei Wang
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
29/06/2015, 14:00
ICMC-11 - Metallic and Composite Materials
Poster Presentation
Ti–24Nb–4Zr–8Sn, abbreviated as Ti2448 from its chemical composition in weight percent, is a multifunctional β type titanium alloy with body centered cubic (bcc) crystal structure, and its highly localized plastic deformation behavior contributes significantly to grain refinement during conventional cold processing. In the paper, In order to explore an effective method to fabricate biomedical...
Mr
Renzhong Piao
(Graduate School of Engineering, Chiba University)
29/06/2015, 14:00
We have started a project to develop a high field compact NMR magnet using high-temperature superconducting (HTS) inner coils. As a first step towards such a magnet, a LTS/REBCO NMR magnet was developed and operated at 400 MHz (9.39 T) in a previous work [1]. However, a homogeneous magnetic field required for high-resolution NMR measurements could not be obtained using conventional field...
Elijah Shoemake
(Washington State University)
29/06/2015, 14:00
Hydrogen has two separable nuclear-spin isomers, denoted by ortho and para, with potentially significant differences in thermophysical properties. The entropy change with ortho-para conversion is the largest of any material phase change known to occur at cryogenic temperatures. A prior experimental study demonstrated that the endothermic reaction of para-ortho conversion can be utilized to...
Vadim Kashikhin
(Fermilab)
29/06/2015, 14:00
Hadron Colliders (HC) are the most powerful discovery tools in modern high energy physics. A 100 TeV scale HC with a nominal operation field of at least 15 T is being considered for the post-LHC era. The choice of a 15 T nominal field requires using the Nb3Sn technology. Practical demonstration of this field level in an accelerator-quality magnet and substantial reduction of the magnet costs...
Mr
Masato Nawa
(Graduate School of Engineering, Chiba University)
29/06/2015, 14:00
Recently, tensile stress tolerance of a Bi-2223 conductor has been drastically improved. Conventional Bi-2223 conductors with copper-alloy reinforcements or stainless steel reinforcements show tensile stress tolerance of ~250 MPa. The stress tolerance has been improved to 400-500 MPa with Ni-alloy reinforcements in combination with a pre-compression of Bi-2223 filaments/Ag-matrix [1]. This...
Mr
Christopher Dodson
(Air Force research labs), Mr
Thomas Fraser
(air force research labs)
29/06/2015, 14:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
Optical refrigeration is currently the only completely solid state cooling method capable of reaching cryogenic temperatures from room temperature. Optical cooling utilizing Yb:YLF as the refrigerant crystal has resulted in temperatures lower than 123K measured via a fluorescence thermometry technique. However, to be useful as a refrigerator this cooling crystal must be attached to a sensor or...
Dr
Shannon White
(Aspen Aerogels, Inc.)
29/06/2015, 14:00
Aspen Aerogels, Inc. validated the key process step for a next generation aerogel manufacturing technology to enable the fabrication of thin, low density aerogel materials. When the thin aerogel is stacked with reflector layers to form an aerogel based insulation system, called Multi-Layer Aerogel Insulation (MLAI), it provides thermal performance advantages compared to incumbent insulation...
Steffen Kloeppel
(TU Dresden)
29/06/2015, 14:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
In the course of the studies for the next generation particle accelerators, in this case the FCC-hh, different aspects are being investigated. One of these is the heat load on the beam tube, which results mainly from the synchrotron radiation. In case of the FCC-hh, a heat load of 500 kW is expected. The heat has to be absorbed at 40 to 60 K due to vacuum restrictions. In this range,...
Thomas Funke
(Technische Universitaet Dresden)
29/06/2015, 14:00
New MLI measurements at the TU Dresden flow type calorimeter have been carried out. Specimens of 10 and 20 layer double side aluminized polyester film were tested.
A cylindrical cold surface of 0.9 m²is held at the desired cold boundary temperature between approximately 30 K and 300 K. The heat transfer through the MLI is measured by recording the mass flow as well as the inlet and the...
Mr
Laurent Jean Tavian
(CERN)
29/06/2015, 14:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Following recommendations of the recent update of the European strategy in particle physics, CERN has undertaken an international study of possible future circular colliders beyond the LHC. This study considers an option for a very high energy (100 TeV) hadron-hadron collider located in a quasi-circular underground tunnel having a circumference of 80 to 100 km. The synchrotron radiation...
Mr
Hidehito Fukuda
(Environment and Energy Materials Division, National Institute for Materials Science)
29/06/2015, 14:00
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
In recent years, many space missions using cryogenic temperatures are being planed. In particular, a high resolution sensor like Transition Edge Sensor needs very low temperatures below 100 mK. It is well known that Adiabatic Demagnetization Refrigerator (ADR) is one of most useful methods to produce ultra-low temperatures in space because of independence on the gravity.
We have studied a...
Ms
Hye Su Lim
(Hong Ik University)
29/06/2015, 14:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
A new and systematic naming method is proposed as academic nomenclature of cryogenic refrigeration cycles for liquefaction of natural gas. Over decades, a large number of LNG processes have been designed and patented, even though only a few are operational in practice, including SMR (single mixed-refrigerant), C3-MR (propane-precooled mixed-refrigerant), cascade, or AP-X processes. These...
Ms
Ranjana Gangradey
(Institute for Plasma Research, India)
29/06/2015, 14:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
For the fabrication of a cryopump with large pumping speeds for use in tokamaks, in particular, for gases such as helium and hydrogen, different activated carbon sorbents (with surface areas ~ 2000 m2/g) in the form of granules, spheres and cloths have been developed. These sorbents are adhesively bonded on a small size hydroformed (in-house developed technology) cryopanel of size ~500mm x 100...
Dr
Klaus-Peter Weiss
(KIT, Institute for Technical Physics)
29/06/2015, 14:00
ICMC-11 - Metallic and Composite Materials
Poster Presentation
Joints between copper and stainless steel are commonly applied in cryogenic systems. A relatively new and increasingly important method to combine these materials is electron-beam (EB) welding. Typically, welds in cryogenic applications need to withstand a temperature range from 300 K down to 4 K and pressures of several MPa. However, very little data is available for classifying EB welds...
Kwanwoo Nam
29/06/2015, 14:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Thermal shield (TS) will be installed in the ITER Tokamak to protect the superconducting magnet from thermal radiation from cryostat and vacuum vessel. The TS is cooled by 80 K helium supplied from cryoplant. The emissivity of TS surface must be maintained below 0.05 by bath-type silver electroplating. The TS is to be fully procured by Korea and it will be assembled in the ITER Tokamak by ITER...
Mr
Jun Tan
(Shanghai Institute of Technical Physics)
29/06/2015, 14:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
The impedance match between the cold finger and the linear compressor of the Stirling-type pulse tube cryocooler (SPTC) is significant to optimize the compressor efficiency and to improve the cold finger cooling performance. Several researches ever studied the impedance match and concluded that there existed the optimal acoustic impedance of the cold finger to acquire the highest compressor...
Dr
Huiming Liu
(Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences)
29/06/2015, 14:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
As a new-type heat pipe, pulsating heat pipe (PHP) has several outstanding features, such as great heat transport ability, strong adjustability, small in size and simple construction. PHP is a complex two-phase flow system associated with many physics subjects and parameters, which utilizes the pressure and temperature change in volume expansion and contraction during phase changes to excite...
286.
Thermal Design and Performance results of the first High Beta Cryomodule for HIE-ISOLDE at CERN
Luca Valdarno
(CERN)
29/06/2015, 14:00
The High Energy and Intensity HIE-ISOLDE is a facility under construction at CERN whose target is ultimately to produce radioactive ion beams at 10MeV/u maximum energy in order to significantly expand the nuclear physics programme carried out by REX-ISOLDE. In its final stage the new upgrade will be composed of two low-β and four high-β superconducting cryomodules. The first high-β cryomodule,...
Hyun Sung Kim
(The Ohio State University)
29/06/2015, 14:00
Advancements in superconducting wire manufacturing has enabled the design and fabrication of superconducting coils for practical magnet applications. To apply superconducting wire for most commercial applications requiring many kilometers of wire, long-length characterization in coil form is important. This study discussed the transport properties of two different solenoid coil wound with long...
Dr
Anna Kario
(Karlsruhe Institute of Technology, Institute for Technical Physics)
29/06/2015, 16:00
ICMC-08 - Superconductor Stability and AC Losses
Invited Oral Presentation
The physical properties of REBCO (RE=rare earth) high temperature superconductors require a flat tape architecture enabling them to carry high current densities. This architecture has an enormous ratio between the width and the thickness of the tape, typically ranging between 1,000 and 10,000. This very large aspect ratio has a detrimental effect on the AC losses, specifically the losses...
Philipp Arnold
(European Spallation Source ESS AB)
29/06/2015, 16:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Invited Oral Presentation
The European Spallation Source (ESS) is a neutron-scattering facility funded and supported in collaboration with 17 European countries in Lund, Sweden. Cryogenic cooling at ESS is vital particularly for the linear accelerator, the hydrogen target moderators, a test stand for cryomodules and the neutron instrument sample environments. The paper will focus on specific process design criteria,...
David Cardwell
(University of Cambridge)
29/06/2015, 16:00
ICMC-06 - HTS and MgB2 Bulk
Invited Oral Presentation
(RE)-Ba-Cu-O [(RE)BCO, where RE = rare earth element such as Y, Nd, Sm, Eu, Gd, etc.] high temperature superconductors (HTS) have significant potential for high field engineering applications at 77 K when fabricated in the form of large single grains by the so-called top seeded melt growth process (TSMG). A novel Y2Ba4CuMOy (Y-2411, where M = U, Zr, Hf, Nb, Ta, W and Mo) phase that is...
Zachary Conway
(Argonne National Laboratory)
29/06/2015, 16:00
CEC-07 - Superconducting RF Systems
Contributed Oral Presentation
Argonne National Laboratory has developed and is implementing a novel 2 K superconducting cavity cryomodule operating at 162.5 MHz and designed for the acceleration of H-/proton beams from 2.1 to 10 MeV as part of the Fermilab Proton Improvement Project-II (PIP-II). The cryomodule supports operation of up to 2 mA average beam current and bunch population of up to 3.8x108 ppb. This work is an...
Mr
Kyeong Ho Kim
(Korea Institute of Science and Technology), Dr
Sarng Woo Karng
(Korea Institute of Science and Technology), Ms
Soojin Shin
(Korea Institute of Science and Technology)
29/06/2015, 16:00
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
Many researchers have studied performance of cryogenic thermal insulation materials with various cryogenic liquids. However, there are not many cases under liquid hydrogen environment. KIST has been operating a 1 L/hr scale hydrogen liquefaction and storage facility since 2013. The KIST liquid hydrogen system can liquefy hydrogen gas to liquid, store and transfer to a dedicated storage...
Ralf Eichhorn
(Cornell University)
29/06/2015, 16:15
CEC-07 - Superconducting RF Systems
Contributed Oral Presentation
Cornell University has finished building a 10 m long superconducting accelerator module as a prototype of the main linac of a proposed ERL facility. This module houses 6 superconducting cavities- operated at 1.8 K in continuous wave (CW) mode - with individual HOM absorbers and one magnet/ BPM section. In pushing the limits, a high quality factor of the cavities (2•10^10) and high beam...
Arthur Na-Nakornpanom
(Jet Propulsion Laboratory)
29/06/2015, 16:15
The Orbiting Carbon Observatory-2 (OCO-2) will have completed its first year in space on July 2, 2015. The OCO-2 instrument incorporates three bore-sighted, high-resolution grating spectrometers, designed to measure the near-infrared absorption of reflected sunlight by carbon dioxide and molecular oxygen. OCO-2 currently flies in a sun-synchronous, near-polar orbit at an inclination of 98.1...
Thomas Richter
(Karlsruhe Institute of Technology (KIT))
29/06/2015, 16:15
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
Complex, non-developable surfaces require a tailored multi-layer insulation (MLI) for lowest heat loads. The most experiments showing the heat transfer through MLI are performed under quasi-ideal conditions determining the principle insulation quality. But the surface to be insulated in real cryostats implies feed-throughs and other non-developable surface parts. The thermal performance of MLI...
Roy Weinstein
(University of Houston)
29/06/2015, 16:30
ICMC-10 - Flux Pinning and Critical Current
Invited Oral Presentation
Pulsed activation studies previously done on zero-field-cooled high Jc YBCO bulks have exhibited giant field leaps (GFL), among other anomalies.[1] Additional experiments, with varying Jc, have now been performed, searching for regularities to illuminate the underlying physics. Thirty single-grain melt-textured YBCO samples with varying Jc (6,700 ≤ Jc ≤ 60,000 A/cm2 at 77 K) were prepared. ...
Dr
QuanSheng Shu
(Retired Senior Scientist)
29/06/2015, 16:30
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
The power consumption in large scale superconducting devices is due to the refrigeration system and the cryogenic devices used in special applications often require an extremely long cryogen holding time. All cryogenic devices and superconducting instruments, regardless of size, small, large or huge, are all working at cryogenic temperature. To economically maintain the device at its operating...
Brian DeGraff
(ORNL)
29/06/2015, 16:30
CEC-07 - Superconducting RF Systems
Contributed Oral Presentation
The Spallation Neutron Source (SNS) at Oak Ridge National Lab (ORNL) has built and commissioned an independent Cryogenic Test Facility (CTF) in part to support 4.5 K operation of a Horizontal Test Apparatus (HTA) vessel in the Radiofrequency Test Facility (RFTF) test cave. The HTA provides the functionality for testing a single dressed SNS medium or high beta Superconducting Radiofrequency...
Prof.
Naoyuki Amemiya
(Kyoto University)
29/06/2015, 16:30
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
Large magnetization of coated conductors is one of the most serious concerns of their applications to MRI or NMR magnets, because it deteriorate the uniformity and stability of the magnetic fields. As the counter measure against large magnetization, the striation of coated conductors was proposed, and its effect was demonstrated in small coils. Even if filaments (narrow conductor strips in a...
xilong wang
(European Spallation Source ESS AB)
29/06/2015, 16:30
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The European Spallation Source (ESS) is a neutron-scattering facility being built with extensive international collaboration at Lund, Sweden. The ESS accelerator will deliver protons with 5 MW of power to the target at 2.0 GeV, with a nominal current of 62.5 mA. The superconducting part of the accelerator is about 300 meters long and contains 43 cryomodules. The ESS accelerator cryoplant...
John Murphy
(University of dayton Research Institute), Dr
Timothy Haugan
(USAF)
29/06/2015, 16:45
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
Long HTS tapes have been fabricated in a variety of formats for the purpose of reducing the sensitivity to AC magnetic fields, from both conducted AC and external fields. Some of the conductors have been made more resistant to AC losses by HTS film composition and many others have been based on geometric arrangements of the conductors, such as different filament patterns in striated tapes, and...
Hyun Sung Kim
(The Ohio State University)
29/06/2015, 16:45
CEC-07 - Superconducting RF Systems
Contributed Oral Presentation
Superconducting radio frequency (SRF) cavities are a well-established technology for imparting energy to the charged particles. Hydroforming technique has been researched to achieve higher accelerating fields and drastic reductions in resonator production time and costs. This study discussed the characterization of hydroformed niobium tubes to support for the subsequent hydroforming of Nb tube...
Wesley Johnson
29/06/2015, 16:45
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
Once on orbit, high performing insulation systems for cryogenic systems need just as good radiation (optical) properties as conduction properties. This requires the use of radiation shields with low conductivity spacers in between. By varying the height and cross-sectional area of the spacers between the radiation shields, the relative radiation and conduction heat transfers can be...
Mr
Yannick FABRE
(AIR LIQUIDE Advanced Technologies)
29/06/2015, 16:45
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The ITER Tokamak requires an average 75kW of refrigeration power to maintain the nominal operation condition of the ITER superconducting magnets and cryopumps. This is produced by three identical liquid helium (LHe) Plants.
Air Liquide Advanced technologies, as the supplier of the entire ITER liquid Helium plant, should demonstrate through various running conditions, that the expected...
Jeff Olson
(Lockheed Martin Space Systems Company)
29/06/2015, 16:45
Lockheed Martin Space Systems Company has built and delivered an engineering model microcryocooler to the Jet Propulsion Laboratory for use with instruments for deep space and earth science missions. Funding for this cryocooler was through JPL’s Maturation of Instruments for Solar System Exploration (MatISSE). This cooler is nearly identical to the compact coaxial microcryocooler presented...
Yuan Yang
(OSU)
29/06/2015, 17:00
ICMC-06 - HTS and MgB2 Bulk
Contributed Oral Presentation
Recently, ZnO and Dy2O3 have been considered as dopants for the improvement of superconducting properties in MgB2 bulks. However, the effect of these dopants is still unclear: some studies reported these metal oxides worked as new pinning centers and others was attributed the effects to Mg site substitution. In addition, low temperature reactions may explore limited solubility regimes for...
Jared Sass
(NASA Kennedy Space Center)
29/06/2015, 17:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
Culminating years of extensive research and development, field demonstrations have proven glass bubbles to be a superior insulation material for spherical liquid hydrogen storage tanks. Six years of operational history has been accumulated on a spherical 218,000-liter liquid hydrogen (LH2) storage tank with glass bubbles insulation in the evacuated annulus. Over this period of time the tank...
Arend Nijhuis
(University of Twente)
29/06/2015, 17:00
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
The performance during an operating plasma scenario of Nb3Sn Cable-in-Conduit Conductors (CICCs) designs envisaged for the ITER Central Solenoid has been analyzed with the code JackPot-ACDC. At present there is no experimental facility available to test the stability of the conductors under relevant pulsed plasma operating conditions. Only limited experimental data is existing that is suitable...
Joshua Kaluzny
(Fermilab)
29/06/2015, 17:00
CEC-07 - Superconducting RF Systems
Contributed Oral Presentation
In order to use stainless steel piping in an LCLS-II cryomodule, stainless steel to titanium bimetallic transitions are needed to connect the stainless steel piping to the titanium cavity helium vessel. Explosion bonded stainless steel to titanium transition pieces and bimetallic transition material samples have been tested. A sample transition tube was subjected to tests and x-ray...
Prof.
Ted Collings
(MSE, OSU)
29/06/2015, 17:15
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
When exposed to a ramping magnetic field the Rutherford cable is the seat of coupling magnetization produced by interstrand coupling currents passing through the interstrand contact resistances (ICR) -- the strand crossover resistances, Rc, and the side-by-side (adjacent-strand) resistances, Ra. The coupling magnetization, is greatest when the applied field is normal to the cable’s surface in...
Jonathan Demko
(LeTourneau University)
29/06/2015, 17:15
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
Standards for thermal insulation used in applications between ambient and low temperatures, below 100 K, require test data under relevant conditions and by different laboratories to develop data sets for the proper comparisons of materials. This critically important technology is needed to provide reliable data and methodologies for industrial energy efficiency and energy conservation. Under...
Yanwei Ma
(Institute of Electrical Engineering, Chinese Academy of Sciences)
29/06/2015, 17:30
ICMC-07 - Pnictides and New Superconducting Materials
Invited Oral Presentation
122 type pnictide superconductors are of particular interest for high-field applications because of their large upper critical fields Hc2 (> 100 T), low anisotropy γ (< 2) and the materials and processes to fabricate wires appear to be relatively inexpensive. However, the porous nature of powder-in-tube (PIT) processed iron-based tapes is one of the important reasons for low critical current...
Philippe Masson
(University of Houston)
29/06/2015, 17:30
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
Magnesium diboride conductors are considered for use on fully superconducting wind turbine generators and, as a results, being able to quantify the AC losses in MgB2 wound stators is paramount. AC losses were measured on several MgB2 conductors based on NiCu matrix material. The measurements were done calorimetrically at about 15 K and at applied magnetic fields up to 100 mT and frequencies up...
Dr
Ronald Ross
(Jet Propulsion Laboratory)
29/06/2015, 17:30
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
Multilayer Insulation (MLI) uses stacks of low-emittance metalized sheets combined with low-conduction spacer features to greatly reduce the heat transfer to cryogenic applications from higher temperature surrounds. However, as the hot-side temperature decreases from room temperature to cryogenic temperatures, the level of radiant heat transfer drops as the forth power of the temperature,...
Francesco Grilli
(Karlsruhe Institute of Technology)
29/06/2015, 17:45
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
DC transmission using high temperature superconducting (HTS) coated conductors offers a promising solution to the globally growing demand for effective, reliable and economic transmission of green energy up to GW level over very long distances. The credible estimation of the losses and thereby the heat dissipation involved is highly essential for the rational design of practical HTS DC...
Wesley Johnson
29/06/2015, 17:45
CEC-14 - Thermal Insulation Systems
Contributed Oral Presentation
Early comprehensive testing of cryogenic multilayer insulation (MLI) focused on the use of silk netting as a spacer material. Silk netting was used for multiple test campaigns designed to provide baseline thermal performance estimates for cryogenic insulation systems. As more focus was put on larger systems, the cost of silk netting became a deterrent and most aerospace insulation firms...
Dr
Ray Radebaugh
(National Institute of Standards and Technology)
30/06/2015, 08:15
CEC-02 - Large-Scale Systems, Facilities, and Testing
Plenary
Research on the H-bomb (called the “super” during early work) began at a low level at Los Alamos National Laboratory during the early- to mid-1940s as part of the Manhattan Project. Theorist felt the thermonuclear reaction within liquid deuterium was the simplest and best understood at that time. On January 31, 1950, President Truman gave the order to pursue the H-bomb, which resulted in an...
Prof.
Junjie Wang
(Technical Institute of Physics and Chemistry, CAS), Mr
Kaixuan Gu
(Technical Institute of Physics and Chemistry, CAS), Mr
Liubiao Chen
(Technical Institute of Physics and Chemistry, CAS)
30/06/2015, 09:00
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
This paper introduces a cryogenic tensile testing apparatus for micro-samples cooled by a miniature pulse tube cryocooler. At present, tensile tests are widely applied to measure the mechanical properties of materials; most of the cryogenic tensile testing apparatus are designed for samples with standard sizes, while for non-standard size samples, especially for micro-samples, the tensile...
Mr
Yongsu Kim
(Ametek Sunpower Inc)
30/06/2015, 09:00
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
The CryoTel® DS 1.5 is a split type Stirling cryocooler which was developed by Sunpower for systems requiring compact size, high efficiency, and high reliability. The DS 1.5 has a lift of about 1.4 watts at 77 K with 30 watts of input power. The cooler design includes gas bearings on the pistons and displacer for non-contact operation, and achieves low vibration by using dual opposed pistons...
Mr
Yin Chuanlin
(Institute of Cryogenics and Electronics)
30/06/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
In order to realize larger and heavier mass supporting without additional supporting components, a new structural pulse tube cooler based on traditional U-shape pulse tube cooler and with one regenerator and two parallel pulse tubes has been proposed. In previous works, two prototypes of U-shape two-pulse-tube paralleled cooler have been designed and tested. In this paper, to help characterize...
Nicolas Delruelle
(CERN)
30/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
The High Intensity and Energy ISOLDE project is a major upgrade of the existing ISOLDE and REX-ISOLDE facilities at CERN. The most significant improvement will come from replacing most of the existing REX accelerating structure by a superconducting linear accelerator (SC linac) composed ultimately of six cryo-modules installed in series, each containing superconducting RF cavities and...
Mr
Christopher Dodson
(Spacecraft Component Thermal Research Group, Kirtland AFB)
30/06/2015, 09:00
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
In predicting Pulse-Tube Refrigerator (PTR) performance, One-Dimensional design and analysis tools such as Gedeon Associates SAGE® typically include models for performance degradation due to thermodynamically irreversible processes. SAGE®, in particular, accounts for convective loss, turbulent conductive loss and numerical diffusion “loss” via correlation functions based on analysis and...
Shaopeng Li
(Institute of High Energy Physics(IHEP),Chinese Academy of Science(CAS),China),
zhuo zhang
(IHEP,CAS,China)
30/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Accelerator driven sub-critical system（ADS）in China is a kind of transmutation machine to minimize the nuclear wastes. As one of the important parts in ADS, InjectorⅠwill be built in IHEP,CAS which needs two cryomodules operating at 2K cryogenic environment to realize 10MeV Proton beam energy; Each cryomodule contains seven Spoke cavities and sevensuperconducting magnets. This paper describes...
Thomas Richter
(Karlsruhe Institute of Technology (KIT))
30/06/2015, 09:00
The new current lead test facility CuLTKa was successfully commissioned in 2014 at the Karlsruhe Institute of Technology (KIT), Germany. Towards the end of the year the first pair of current leads for the Japanese fusion experimental reactor JT-60 SA was tested. These current leads have to carry currents of up to 26 kA and are cooled with helium at two different temperature levels, 4.5 K and...
Ralf Eichhorn
(Cornell University)
30/06/2015, 09:00
As kicks from fundamental power couplers become a concern for low emittance future accelerators, a design for a symmetric coupler for superconducting accelerating cavities has been started. In this coupler, a rectangular waveguide transforms into a coaxial line inside the beam pipe to feed the cavity. So far the RF design revealed an extremely low transversal kick on which we will elaborate....
Dr
Junseok Ko
(Korea Institute of Machinery & Materials)
30/06/2015, 09:00
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
Cryogenic cooling systems for HTS electric power devices require a reliable and efficient high-capacity cryocooler. A Stirling cryocooler with a linear compressor can be a good candidate. It has advantages of low vibration and long maintenance cycle compared with a kinematic-driven Stirling cryocooler. In this study, we developed dual-opposed linear compressor of 12 kW electric input power...
Rajeev Hatwar
(Florida State University)
30/06/2015, 09:00
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
High Temperature Superconducting (HTS) materials have been demonstrated to be suitable for applications in shielding of both DC and AC magnetic fields. Magnetic shielding is required for protecting sensitive instrumentation from external magnetic fields and for preventing the stray magnetic fields produced by high power density equipment from effecting neighboring devices. HTS shields have...
Kelly Dixon
(Jefferson Lab)
30/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
After practical changes were approved to the initial conceptual design of the cryogenic system for the MSU FRIB and an agreement was made with JLab in 2012 to lead the design effort of the cryogenic plant and later the cryo-distribution system, many activities are in place leading toward a cool-down of the linacs prior to 2018. This is mostly due to using similar equipment used at CHLII for...
Mr
David McGuire
(National High Magnetic Field Laboratory)
30/06/2015, 09:00
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Poster Presentation
Due to the potential spatial temperature variations during heat treatment of the large central solenoid (CS) coils, it is necessary to study the strand’s heat treatment sensitivity by characterizing the strands heat treated with slightly different temperature profiles. We present critical current (Ic) and residual resistivity ratio (RRR) results of ITER Nb3Sn strands made by two manufacturers...
Dr
David Foley
(Shear Form, Inc.)
30/06/2015, 09:00
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Poster Presentation
Ta diffusion barrier integrity is critical in the development of higher Nb ratios in internal-tin (IT) conductors. Current fabrication methodologies predominantly employ conventional wrapped Ta sheet, which deform non-uniformly during wire drawing. This leads to non-uniform Ta layers, with thickness varying between 10-2 microns as evident from IT cross-sectional images. The objective of this...
Mr
Sergey Sobol
(Technion - Israel Institute of Technology)
30/06/2015, 09:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
A novel type of the PZT based compressor operating at mechanical resonance, suitable for pneumatically-driven Stirling-type cryocoolers was developed theoretically and built practically during this research. A resonance operation at relatively low frequency was achieved by incorporating the piezo ceramics into the moving part, and by reduction of the effective piezo stiffness using hydraulic...
Brian DeGraff
(ORNL)
30/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
The main cryogenic system for the Spallation Neutron Source (SNS) is comprised of a 4 K cold box, a 2 K cold box, six warm compressors, and ancillary support equipment. This system has been cold and operating with little disruption since 2006. Design and operation of Liquid Nitrogen (LN2) supplied from a single 20,000 gallon supply dewar will be discussed. LN2 used to precool the 4 K cold...
Cedric Garion
(CERN)
30/06/2015, 09:00
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
The High Luminosity LHC (HL-LHC) project aims at increasing the luminosity (rate of collisions) in the Large Hadron Collider (LHC) experiments by a factor of 10 beyond the original design value (from 300 to 3000 fb-1). It relies on new superconducting magnets, installed close to the interaction points, equipped with new beam screen. This component has to ensure the vacuum performance together...
Ms
Isabel Catarino
(Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa)
30/06/2015, 09:00
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
The cold head on mechanical Pulse Tube Cryocoolers (PTCs) are subject to substantially less mechanical vibration and electromagnetic interference compared to that typically found in Gifford MacMahon coolers. However, thermal fluctuations at the PTC frequency are still present at the cold-head, typically at a level of 200 mK peak-to-peak at 1.4 Hz for a Cryomech Model PT405 cooler running at 4...
Mr
Nico Dittmar
(Technische Universitaet Dresden)
30/06/2015, 09:00
Continuous flow cryostats are used to cool samples to a variable temperature level by evaporating a cryogen, e.g. liquid helium (LHe). For this purpose LHe is usually stored outside the cryostat in a mobile dewar and supplied with a transfer line. In general, the complete setup has to be characterised by a low consumption of LHe. Additionally, a minimum sample temperature is favourable from an...
Sungwoon Yoon
(Institute for basic science)
30/06/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
A large-scale helium refrigeration system is under designing by Rare Isotope Science Project for a new superconducting Linac, RAON. Heat loads of cryogenic components including cryomodules for superconducting, LTS magnets for IF (In-flight) Separator, and helium distribution system are predicted. The coldbox will supply 4.5 K supercritical helium and 40 K gas helium to each cryomodule through...
Shreyas Balachandran
(Texas A&M University)
30/06/2015, 09:00
ICMC-11 - Metallic and Composite Materials
Poster Presentation
The objective of the work reported is to demonstrate a fabrication method for developing reproducible uniform fine-grained microstructures in seamless RRR Nb tube. The target application is the inexpensive manufacture of RRR Nb superconducting radio frequency (SRF) cavities. Present methods to manufacture seamless Nb tubing from rolled Nb sheet by deep drawing, spinning, and flow forming...
Federico Scurti
(NC State University)
30/06/2015, 09:00
ICMC-08 - Superconductor Stability and AC Losses
Poster Presentation
A novel quench detection method is developed and tested using optical fibers as distributed sensors of temperature and strain. In particular, the technique is based on the comparison of Rayleigh backscattering signals of a reference and perturbed state. A spectral shift quantifies the mismatch between the two conditions, which depends on temperature and strain changes between the two compared...
James Tuttle
(NASA/GSFC)
30/06/2015, 09:00
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
High-emissivity (black) surfaces are commonly used on deep-space radiators and thermal radiation absorbers in test chambers. Since 2011 NASA Goddard Space Flight Center has been measuring the total hemispheric emissivity of such surfaces from room temperature down to 20 Kelvin using a test apparatus that fits inside a small laboratory cryostat. We report the latest data from these...
Jan Hendrik Derking
(CERN)
30/06/2015, 09:00
A new cryogenic test facility is currently under construction at CERN for future needs of the laboratory. This facility will be at first used for the cryogenic testing of the Super-FRS magnets of the International Facility for Antiproton and Ion Research (FAIR) being built at GSI in Germany. In total 57 magnets will be tested of which the largest magnets have a cold mass of 45’000 kg. The...
Xingchen Xu
(the Ohio State University)
30/06/2015, 09:00
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Poster Presentation
For Nb3Sn strands used in magnets, persistent-current magnetization must be carefully considered because it is an important contributor to field errors in magnets. Compared with the usual measurements by magnetometers, the true magnetizations of Nb3Sn strands used in magnets are in fact smaller because the transport currents they are carrying suppress their magnetizations. In an earlier work...
Michael Boersch
(WEKA AG),
Pascal Erni
(WEKA AG)
30/06/2015, 09:00
Cryogenic and high-pressure control valves have to meet topmost requirements as a result of extreme operating conditions. Of prime importance are accuracy and high reproducibility of the control performance and further maximised reliability and service life time. To verify these requirements several procedures are implemented which are partially defined with general standards. Furthermore...
Dr
Sergey Koshelev
(Fermilab)
30/06/2015, 09:00
Thermal conductivity of SRF cavity material influences Q factor in many different ways. RRR and grain size are insufficient to characterize quality of the material and additional control of thermal conductivity is required. We have developed a test stand to perform regular thermal conductivity measurements of samples from cavity material sheets from 1.6 to $\approx$10 K. Thermal conductivity...
Mr
Lei Zhang
(Shanghai Institute of Technical Physics, Chinese Academy of Sciences)
30/06/2015, 09:00
The linear compressor providing powers for the Stirling-type pulse tube Cryocooler (SPTC) is endowed with remarkable merits such as high reliability and long life which have a strong appeal to aerospace applications. The pulse tube cold finger (PTCF) exerts evident and complicated influences on the compressor’s performance. However, there is seldom systematic investigation on the influences,...
Mr
Nick Emery
(Callaghan Innovation)
30/06/2015, 11:00
Fabrum Solutions in association with Callaghan Innovation and Absolut System has developed a 330 W pulse tube cryocooler based on Callaghan Innovation’s diaphragm pressure wave generators (DPWG). A cost-effective, long life and robust cryocooler has been achieved due to the pulse tube’s lack of moving parts and the DPWG’s metal diaphragms separating the working gas from the oil lubricated...
Matthias Mentink
(CERN)
30/06/2015, 11:00
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Invited Oral Presentation
Externally applied strain affects the superconducting properties of Nb3Sn in a detrimental way. This is an important design issue in high-magnetic-field applications utilizing Nb3Sn technology where distortion due to Lorentz forces and differential thermal contraction is unavoidable.
An overview is given of how the critical current density of Nb3Sn is affected by temperature, magnetic field...
Nilotpala Bej
(Indian Institute of Technology, Kharagpur)
30/06/2015, 11:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Ranque -Hilsch vortex tube is a device that is capable of splitting the highly compressed inlet gas into two streams of lower pressure gases, namely, central zone of cold fluid generated near the axis and peripheral zone of hot fluid around the inner wall of the tube. Though, vortex tube has many benefits over the conventional heating and cooling devices, low efficiency is the biggest drawback...
Hernan Furci
(CEA Saclay)
30/06/2015, 11:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Boiling helium natural circulation loops are being used as the cooling systems of large magnet systems because they provide inherent safety and maintenance advantages. It is the case of the CMS detector magnet at CERN (already in operation) or R3B-GLAD spectrometer at GSI (in installation phase). Such cooling systems are mainly composed by a top helium reservoir that provides the coolant by...
Takanobu Kiss
(Kyushu University)
30/06/2015, 11:00
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
Spatial homogeneity of critical current, Ic, is one of the most important performances of practical HTS tapes. Such Ic homogeneity is typically characterized by the reel-to-reel transport measurement with a tap distance of several tens cm to several m. However, the spatial resolution is not enough in the conventional method to detect local Ic drop, especially in the case of Bi-2223 tape...
Mr
Aman Kumar Dhillon
(Indian Institute of Technology, Kharagpur)
30/06/2015, 11:15
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Vortex tube (VT) is a simple low refrigeration producing device having no moving part. However, the flow inside it is very complex. Recent studies show that the performance of VT improves with the increase in the divergence angle of a flared VT. To explore the temperature separation phenomenon in the VT, a three dimensional computational fluid dynamics (CFD) analysis of VT was carried out. For...
Alan Caughley
(Callaghan Innovation)
30/06/2015, 11:15
Fabrum Solutions in collaboration with Callaghan Innovation has been developing large pulse tube cryocoolers based on Callaghan Innovation’s diaphragm pressure wave generators (DPWG). The pulse tube’s lack of moving parts in combination with the DPWG’s metal diaphragms produces a cost-effective, long life and robust cryocooler. The DPWG has had 10 years of development, resulting in a series of...
Dr
Yifei Zhang
(SuperPower Inc.)
30/06/2015, 11:15
ICMC-02 - RE123 Conductors Processing and Properties
Contributed Oral Presentation
Irreversible tensile stress was experimentally studied at 77K self field for 2G HTS wires fabricated using the IBAD-MOCVD processes on Hastelloy substrates. The irreversible stress is a critical stress above which the critical current (Ic) retention of a wire is less than 99% of its original Ic after the complete release of the stress. As a characteristic electromechanical property, the...
Dr
Tripti Sekhar Datta
(Inter- University Accelerator Centre. New Delhi. India)
30/06/2015, 11:15
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Five beam line cryomodules with total 27 superconducting RF cavities are installed and commissioned at IUAC to enhance the energy of heavy ion from 15 UD Pelletron. To reduce the heat load at 4.2 K, liquid nitrogen cooled intermediate thermal shield is used for all these cryomodules. For three linac cryomodules, concept of forced flow LN2 cooling is used and for superbuncher and rebuncher,...
Mr
Luis Fonseca
(University of Wisconsin Madison)
30/06/2015, 11:30
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
We report test results using an innovative passive cooling system called a “Pulsating Heat Pipe” (PHP) operating at temperatures ranging from 77 K to 80 K and using nitrogen as the working fluid. PHPs, which transfer heat by two phase flow mechanisms through a closed loop tubing have the main advantage that no electrical pumps are needed to drive the fluid flow. In addition, PHPs have an...
Mr
Matthieu Scannapiego
(Karlsruhe Institute of Technology)
30/06/2015, 11:30
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Large customized cryogenic pumps are used in fusion reactors to evacuate the plasma exhaust from the torus. They usually consist in an active pumping surface area cooled below 5 K and shielded from direct outer thermal radiation by plates cooled at about 80K. Cryopumps are exposed to excessively high heat fluxes during pumping operation and follow regeneration cycles with rapid warm-up and...
Dr
Philip Spoor
(Chart Industries)
30/06/2015, 11:30
Several years ago, we reported on a 50-gallon-per-day oxygen liquefier that uses Stirling-type pulse-tube coldheads driven by a large flexure-bearing pressure wave generator (PWG), in development for the new generation of U.S. Navy aircraft carriers. The first of these liquefiers is about to be deployed on the USS Gerald R. Ford. This presentation describes the completion and performance...
Dr
Amir Kajbafvala
(Materials Science Center, University of Wisconsin-Eau Claire)
30/06/2015, 11:30
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
High temperature superconductors (HTS) are an enabling technology for superconducting magnets generating magnetic fields greater than 25 T. The development of high field HTS magnets requires not only a conductor capable of carrying sufficient critical current density (Jc) at high magnetic field, but also one that is sufficiently strong to withstand the very large Lorentz forces and other...
Xingchen Xu
(the Ohio State University)
30/06/2015, 11:30
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
In an earlier work we demonstrated on a monofilament that the internal oxidation method can significantly refine the grain size and improve the high-field Jc of Nb3Sn strands. In that work we found that as the Nb3Sn grain size was reduced down to 20-50 nm (with an average of 36 nm), the peak of the Fp-B curve shifted from 0.2Birr to 0.34Birr. In this work we further reduce the grain size by...
Mr
Haoren DENG
(Zhejiang University)
30/06/2015, 11:45
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
The oscillating heat pipe (OHP) has been increasingly studied in cryogenic application, for its high transfer coefficient and quick response. Compared with Nb3Sn and NbTi, MgB2 whose critical transformation temperature is 39K, is expected to replace some high-temperature superconducting materials at 25K. In order to cool MgB2, this paper designs a Hydrogen Pulsating Heat Pipe, which allows to...
Dr
Dmitry Luchinsky
(Mission Critical Technologies)
30/06/2015, 11:45
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
We report on the development of a hierarchy of models of two-phase flow in cryogenic transfer line. The work is motivated by NASA plans to develop and maturate technology of cryogenic propellant loading on the ground and in space. The solution of this problem requires two-phase cryogenic flow models that are fast and accurate enough to identify flow conditions, to detect deviations from the...
Lance Cooley
(Fermilab)
30/06/2015, 11:45
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
The LHC will undergo a replacement of the inner triplets at the two main interaction regions between 2020 and 2023. Leading up to this activity will be the production of approximately 90 quadrupole magnets starting in 2018, for which approximately 10 tons of Nb3Sn conductor will be procured. The lead time for this conductor requires orders to be placed starting in 2016. This presentation...
Dr
Sastry Pamidi
(The Florida State University, Center for Advanced Power Systems)
30/06/2015, 11:45
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
AC losses in YBCO coated conductor tapes are one of the major heat load on the cryogenic systems in HTS cables, fault current limiters, and transformers. To reduce AC losses in tapes made using RABiTS process, a nonmagnetic substrate is being developed. Coated conductor tapes designed and manufactured using the new substrate have been characterized for critical current density and transport...
Xuan Peng
(Hyper Tech Research Inc.)
30/06/2015, 12:00
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
Tube type Nb3Sn conductor has been being explored by Hyper Tech Research Inc. Our standard conductor with 217 filament arrays have been generated with 12 T non-Cu Jc values of about 2400-2500 A/mm2 with filament size of 40 micros at the 0.85 mm strand. Recently we made 547 filament conductor which has filament size of 25 micros at the 0.85 mm strand without any drawing issue. We are working to...
Mike Sumption
(The Ohio State University)
30/06/2015, 12:00
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
Two different routes have been developed for persistent joints in react and wind MgB2, relevant to MRI. The first uses superconducting solder, the second does not. The joints were developed using standard MgB2 multifilamentary in-situ type strand. Both joint types assumed a react and wind approach. Two types of tests were performed. The first type was a direct I-V (4-point) measurement of the...
Paulo Augusto
(APLICAMA Research Group - Univ Salamanca - SPAIN)
30/06/2015, 12:15
ICMC-08 - Superconductor Stability and AC Losses
Contributed Oral Presentation
AC losses still represent an important heating source when operating superconducting magnets. This is even more the case when powering-up the superconducting magnet, even at DC currents. We have developed new methods to evaluate the heat produced by ac losses during powering procedures of superconducting magnets. These include the Bean model assuming the penetration in a cylindrical form, and...
Michael Brown
(Florida State University)
30/06/2015, 12:15
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Contributed Oral Presentation
PIT and RRP® Nb3Sn strands are being studied as potential candidates for high field accelerator magnet upgrades for the LHC. It is well known that maintaining diffusion barrier integrity in these strands is vital to retaining adequate RRR for magnet stability. Here we report a quantitative study of the shape and position of filaments or sub-elements after rolling lengths of unreacted PIT and...
Bertrand Baudouy
(CEA Saclay)
30/06/2015, 14:00
For long term missions in deep space, a large superconducting toroid magnet to protect astronauts from ionizing radiations coming from Galactic Cosmic Ray is under studied in the frame work of the Space Radiation Superconducting Shield (SR2S) European project. This magnet is made of Titanium clad MgB2 superconductor to afford a bending power greater than 5 T.m at a cryogenic temperature of 10...
Patrícia Borges de Sousa
(LIBPhys, Physics Department, Faculty of Sciences and Technology, Universidade Nova de Lisboa)
30/06/2015, 14:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Theoretical studies show that neon can influence the nitrogen phase diagram, lowering its triple-point temperature. The use of a neon-nitrogen mixture that could remain liquid at temperatures below the nitrogen triple-point (63.15 K) could solve some problems in the cryogenics field, namely to obtain a stable cryogenic fluid in the temperature range from 44 to 54 K, where no pure cryogenics...
Masaru Tomita
(Railway Technical Research Institute)
30/06/2015, 14:00
Railway Technical Research Institute has developed superconducting cable applications for railway systems in Japan. Railway feeders of superconducting cables could significantly reduce the voltage decay. Therefore, DC HTS Electrification has various advantages, such as the reduction of transmission losses, the improvement of the regeneration factor, and the reduction of substations. From a...
Kyohei Natsume
(Japan Atomic Energy Agency)
30/06/2015, 14:00
JT-60SA is a fully superconducting fusion experimental device involving Japan and Europe. The cryoplant supplies supercritical or gaseous helium to superconducting coils through valve boxes (VBs) or coil terminal boxes (CTBs). There are 89 temperature measurement points at 4 K in VBs and CTBs. Resistance temperature sensors will be installed on cryogen pipes in vacuum.
Two type of sensors...
Milan Majoros
(The Ohio State University)
30/06/2015, 14:00
A two layer CORC (Cable on Round Conductor) cable, 156 cm long, was tested for stability and normal zone propagation at 77 K in liquid nitrogen bath. The cable was instrumented with potential taps and wires on each strand covering its central portion (i.e. excluding the end connections of the cable with the outside world). A heater was placed on top of the cable which allowed pulses of various...
Jesper Ringnér
(ESS),
John Jurns
(European Spallation Source ESS AB)
30/06/2015, 14:00
A key feature of the target system at ESS will be the cold moderators. With the use of supercritical hydrogen at 17 K and1.5 MPa, the energy of the neutrons is reduced before they reach the instrument lines. The neutrons will deposit significant amounts of energy into the hydrogen that must be removed to maintain the hydrogen at its nominal operating temperature. The cooling for the hydrogen...
Paulo Augusto
(APLICAMA Research Group - Univ Salamanca - SPAIN)
30/06/2015, 14:00
We are desiging a new separating device and among several other components we had designed vapour-cooled current leads. This current leads are based on a classical design (for proper stability and robustness of the full device that does not allow many degrees of freedom) and therefore made of Low-Tc material connected with copper wires and some parts of High-Tc material. Its design is...
Prof.
SHRIDHAR BAPAT
(Department of Mechanical Engineering, Indian Institute of Technology Bombay)
30/06/2015, 14:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
Literature suggests that Alpha configuration Stirling cryocooler shows better theoretical performance when compared with Gamma configuration cryocooler. However, this has not been confirmed experimentally due to non-availability of drive mechanism providing large stroke to diameter ratio for Alpha cryocooler. The concept of novel compact drive mechanism can be used to operate miniature Alpha...
Mr
Ryosuke Arai
(Environment and Energy Materials Division, National Institute for Materials Science)
30/06/2015, 14:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
Magnetic refrigeration uses solid magnetic materials as refrigerant without global warming gas and fluorocarbon. In addition, it is expected the higher efficiency than that of vapor refrigeration system. Active Magnetic Regenerative Refrigeration (AMRR) system has demonstrated as an environmentally attractive candidate in near room temperature.
There are many studies for the magnetocaloric...
Mrs
Laetitia Dufay-Chanat
(CERN)
30/06/2015, 14:00
CEC-11 - Safety, Reliability, and Standards
Poster Presentation
The 27-km circumference LHC underground tunnel is a confined space in which the helium-cooled LHC magnets are installed. The vacuum enclosures of the superconducting magnets are protected by over-pressure safety relief devices that open whenever cold helium escapes either from the magnet cold enclosure or from the helium supply headers, into this vacuum enclosure. A 3-m long no stay zone...
Mr
Andreas Janzen
(Karlsruhe Institute of Technology, Institute for Technical Thermodynamics and Refrigeration)
30/06/2015, 14:00
A new method for flow measurement in cryogenic systems was published recently. The caloric measuring principle is based on two analytical and linearly independent evaluation functions for the mass flow rate, both using the same temperature and heater power measuring data as input parameters. This enables a complete compensation of systematic errors, as well as in situ calibration of the flow...
Yannick Bessler
(Forschungszentrum Jülich)
30/06/2015, 14:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
Neutron scattering experiments benefit from an increasing brilliance of the neutrons supplied. In addition to more powerful neutron sources, the efficiency providing those neutrons is becoming more important. Focus of the report presented here is therefore the optimization of one of the key components, the cold moderator. A cold moderator is usually a pressure vessel, which is filled with...
Dr
Jacob Kephart
(Navy)
30/06/2015, 14:00
CEC-08 - Cryogenic Power Cables and Leads
Poster Presentation
Most modern-day high temperature superconducting (HTS) power systems are designed to immerse the entire cable in subcooled nitrogen, taking advantage of favorable thermal and electrical properties. This project investigates the use of nitrogen in two phases, gas and liquid. The latent heat of vaporization of nitrogen provides a means of absorbing heat leaked into the cryostat or generated in a...
Mr
Rongjin HUANG
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China)
30/06/2015, 14:00
ICMC-11 - Metallic and Composite Materials
Poster Presentation
Negative thermal expansion (NTE) materials, which contract rather than expand when heated, can be blended with materials showing positive thermal expansion to form composite for obtaining precisely tailored thermal expansion coefficient. Low-temperature NTE materials have wide potential applications in cryogenic engineering. The NaZn13-type La(Fe,Si)13-based compounds are recently developed as...
Milan Majoros
(The Ohio State University)
30/06/2015, 14:00
Coated conductor YBCO cables are of interest for (among other applications) use in high energy physics accelerator magnets. In dipole and quadrupole magnets (where coated conductor YBCO cable may be used for a high field insert) field quality, especially at injection, is a key parameter, and limits the amount of acceptable magnetization in a cable. In this presentation a superconducting 3...
Pierre Bauer
(ITER Organization)
30/06/2015, 14:00
CEC-08 - Cryogenic Power Cables and Leads
Poster Presentation
The ITER current leads will transfer large currents of up to 68 kA into the biggest superconducting magnets ever built. Following the development of prototypes and targeted trials of specific manufacturing processes through mock-ups, China is preparing for the series fabrication in ASIPP (Chinese Institute of Plasma Physics). A key component of the ITER HTS current leads are the resistive heat...
Dr
Alexander Veprik
(SCD)
30/06/2015, 14:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Boil-off isothermal calorimetry of Integrated Dewar-Detector Assemblies (IDDA) is a routine part of their acceptance testing. In this traditional approach, the cryogenic liquid coolant (LN2, typically) is let to naturally boil and evaporate from the cold well to the atmosphere; the parasitic heat load is then evaluated as the product of the latent heat of vaporization and the "last drop"...
Nathaniel Allen
(Tufts University)
30/06/2015, 14:00
The Twisted Stacked-Tape Cable (TSTC) is one method for cabling flat REBCO tapes and may be a viable option for implementing high temperature superconductors in various applications including power transmission, fusion and high-energy physics. To fully characterize the electromechanical behavior TSTCs it is important to understand the performance of single REBCO tapes under various loading...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
30/06/2015, 14:00
At the J-PARC, the high-energy MeV-order neutrons, which are produced via a spallation reaction between 3-GeV protons and the mercury nucleus, are moderated to cold neutrons with MeV-order energy by passing them through a supercritical hydrogen moderator (1.5 MPa and around 20 K). The cryogenic hydrogen system, which provides it to three hydrogen moderators, has been completed in April 2008....
Dr
Ali Kashani
(Millennium Engineering & Integration Company)
30/06/2015, 14:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
A cryogenic advanced propellant loading (APL) system is being developed at NASA. The APL will be employed in a wide range of applications including autonomous cryogenic loading operations. The number of applications and a variety of loading regimes call for development of computer assisted design and optimization methods that will reduce time and cost and improve reliability of APL. An aspect...
Tim Mulder
(CERN / Twente Technical University (NL))
30/06/2015, 14:00
Within the Physics Department of CERN the development of CORC (Conductor on Round Core) type HTS cables is pursued in view of possible application in future detector and fusion magnets. An important issue is the design and qualification of terminations that connect CORC cables mutually or to bus-bar systems. A termination design is envisaged which combines a simple manufacturing process with a...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
30/06/2015, 14:00
The J-PARC cryogenic hydrogen system provides supercritical hydrogen with the para-hydrogen concentration of more than 99 % and the temperature of less than 20 K to three moderators so as to provide cold pulsed neutron beams of a higher neutronic performance. The nuclear heating is estimated to be 3.75 kW at the moderators for a 1-MW proton beam operation. The temperature rise is estimated to...
Milind Atrey
(Indian Institute of Technology Bombay), Dr
P M Ardhapurkar
(SSGMCE Shegaon, India)
30/06/2015, 14:00
The overall efficiency of mixed refrigerant Joule–Thomson (MR J–T) cryocooler is governed by the performance of recuperative heat exchanger which precools the refrigerant mixture prior to expansion in a J-T valve. In the heat exchanger, the hot stream of the mixed refrigerant undergoes condensation at high pressure while the cold stream gets evaporated at low pressure. The pressure drop in the...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
30/06/2015, 14:00
At the J-PARC spallation neutron source, high-energy MeV-order neutrons generated from a mercury target are reduced to the appropriate energy level (meV order) in three types of hydrogen moderators (coupled, decoupled, and poisoned).The J-PARC cryogenic hydrogen system provides supercritical cryogenic hydrogen to the moderators at a pressure of 1.5 MPa and temperature of 18 K and removes 3.8...
Mr
Rongjin Huang
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China)
30/06/2015, 14:00
ICMC-11 - Metallic and Composite Materials
Poster Presentation
The Fe-based NaZn13-type compounds LaFe13-xMx (M=Si, Al) have attracted considerable attention because of their intriguing properties, such as magnetocaloric effect and abnormal thermal expansion. These unusual properties are of fundamental interest and have potential technical applications in cryogenic engineering when related materials operate in low temperature environment. The thermal...
Mr
Christopher Dodson
(Air Force Research Labs), Mr
Kyle Martin
(Applied Technology Associates), Mr
Tomas Fraser
(Air Force Research Labs)
30/06/2015, 14:00
Cascade Joule-Thomson Microcoolers have been proposed in literature in which different compressors with low values of pressure ratio of order four using different working fluids are anticipated to drive the microcooler. A cascade of five stages is expected to provide cooling at a load temperature of 150 K. In this study a second-law analysis of such a microcooler is performed to quantify the...
Leslie Bromberg
(Massachusetts Institute of Technology)
30/06/2015, 14:00
CEC-08 - Cryogenic Power Cables and Leads
Poster Presentation
This paper considers the use of a solid cryogen as a means to stabilize, both mechanically and thermally, superconducting wires (MgB2, 2212 or 2G) within a dual channel cable-in-conduit (CIC) cable for use in AC applications, such as a generator stator winding. The cable consists of two separate channels; the outer channel contains the superconducting strands and is filled with a fluid (liquid...
Victoria Cooley
(University of Wisconsin-Madison)
30/06/2015, 14:00
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Poster Presentation
The goals of Fermilab’s Superconductivity and Radio Frequency Development Department are to engineer, fabricate, and improve superconducting radio frequency (SCRF) cavities in the interest of advancing
accelerator technology. Improvement includes exploring possible limitations on cavity performance and mitigating such impediments. This report focuses on investigating and measuring the Seebeck...
Peter Knudsen
(Jefferson Lab)
30/06/2015, 14:00
Most large sub-atmospheric helium refrigeration systems incorporate a heat exchanger at the load, or in the distribution system in some cases, to counter-flow the sub-atmospheric return with the super-critical or liquid supply. A significant process improvement is theoretically obtainable by handling the exergy loss across the Joule-Thompson throttling valve supplying the flow to the load in...
Dr
Guoping Wang
(Institute of High Energy Physics(IHEP)), Ms
yaqiong wang
(Institute of High Energy Physics)
30/06/2015, 14:00
CSNS cryogenic system offers 1.5 MPa hydrogen as a neutron moderator at 18 ~ 22 K, and the para hydrogen concentration is higher than 99%. Two cold boxes were adopted, one is hydrogen circulation cold box and the other is accumulator cold box. The main equipments in the hydrogen circulation cold box are ortho-para convertor, H2-He heat exchanger, hydrogen circulators and hydrogen heater. And...
JONG BAIK
(FLORIDA SOLAR ENERGY CENTER)
30/06/2015, 14:00
The NASA Kennedy Space Center researchers have been working on enhanced and modernized cryogenic liquid propellant handling techniques to reduce life cycle costs of propellant management system for the unique KSC application. The KSC Ground Operation Demonstration Unit (GODU) for liquid hydrogen plans to demonstrate integrated refrigeration, zero-loss flexible term storage of liquid hydrogen,...
Cheonkyu Lee
(KAIST)
30/06/2015, 14:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Mixed refrigerant (MR) which efficiently resolve the limitations of pure refrigerant for Joule-Thomson (J-T) cooling, draws a lot of attention from numerous researchers. Although MR can possess desirable characteristics for wide temperature range of cooling with partial evaporation and condensation, it has a significant operating challenge. Unlike hydrocarbon MRs, a non-flammable MR may have a...
Venkat Selvamanickam
(University of Houston)
30/06/2015, 16:00
ICMC-02 - RE123 Conductors Processing and Properties
Invited Oral Presentation
RE-Ba-Cu-O (REBCO, RE=rare earth) coated conductors are being produced today by at least six companies world wide in lengths over 500 meters. REBCO coated conductors are being tailored specifically to the requirements in high magnetic field applications as well as AC applications. We have developed heavily-doped REBCO conductors with 15 – 25 mol% Zr addition with excellent properties in...
Prof.
Herman H. J. Ten Kate
(CERN - Physics Department)
30/06/2015, 16:00
CEC-06 - Superconducting Magnet Systems
Invited Oral Presentation
In February 2014 CERN launched a design study for a future 100 TeV circular proton-proton collider with collision energy 7 more than in the present Large Hadron Collider. A new 100 km circular tunnel for the collider is foreseen as well as at least two new general purpose detectors. The study will materialize as a conceptual design report is to be issued in 2018 and eventually leading to...
GLEN MCINTOSH
(MCINTOSH CRYOGENICS LLC)
30/06/2015, 16:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The underlying theory of hydrogen Ortho-Para conversion has long been known, but the specifics of non-linear heat of conversion from normal to para hydrogen have not been widely disseminated in the cryogenic literature. These factors are reviewed and thermally efficient applications in liquefiers and back conversion cooling systems are illustrated.
Frederick Berg
(Airbus Group)
30/06/2015, 16:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
Environmental and economic pressures lead to a need, in the aerospace industry, to develop ever more efficient passenger aircraft. Further progress in this regard may necessitate a move away from the conventional configurations seen today toward more radical designs. Aircraft with distributed propulsion may lead to fuel savings by allowing the exploitation of aerodynamic improvements. However,...
Yoshinori Ono
(National Institute for Materials Science)
30/06/2015, 16:00
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
High-cycle fatigue properties of Alloy 718 plates were investigated at 77 K in this study. Two plates were used and had a normal-grained and a bimodal-grained (BG) microstructure, respectively. Regarding the normal-grained plate, we prepared two specimens that had different grain sizes by controlling solution-treatment conditions. One had a fine-grained (FG) microstructure and its mean grain...
Mr
Wolfgang Hees
(European Spallation Source ESS AB)
30/06/2015, 16:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The European Spallation Source (ESS) is an intergovernmental project building a multidisciplinary research laboratory based upon the world’s most powerful neutron source to be built in Lund, Sweden. The ESS will use a linear accelerator which will deliver protons with 5 MW of power to the target at 2.0 GeV with a nominal current of 62.5 mA. A cryomodule test stand will be supplied with helium...
Mr
Jan Hildenbeutel
(Linde Kryotechnik AG)
30/06/2015, 16:15
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
In order to test the fast-ramped superconducting magnets for FAIR (Facility for Antiproton and Ion Research), a cryogenic test facility with an equivalent overall capacity of 1.5 kW at 4.4 Kelvin was designed and commissioned at GSI Helmholzzentrum für Schwerionenforschung GmbH.
For efficient testing of the 108 dipole magnets the cryogenic infrastructure consists of a refrigeration system and...
Timothy Haugan
(U.S. Air Force Research Laboratory)
30/06/2015, 16:15
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
Hybrid-electric-vehicle (HEV) or electric-vehicle (EV) propulsion is well understood from the automotive industry, and achieves very significant increases of energy efficiencies of 2-3x from the use of non-combustion technologies and ‘smart’ energy management including brake regeneration. The possibility of battery-electric and hybrid-electric propulsion for aircraft has increasingly been...
Adam Swanger
(NASA Kennedy Space Center)
30/06/2015, 16:15
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The modification and outfitting of a 125,000-liter liquid hydrogen tank was performed to provide integrated refrigeration and storage capability. These functions include zero boiloff, liquefaction, and densification and therefore requires provisions for sub-atmospheric tank pressures within the vacuum-jacketed, multilayer insulated tank. The primary structural modification was to add...
Robert Walsh
(Florida State University)
30/06/2015, 16:15
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
The ITER Central Solenoid (CS) coils utilize cable-in-conduit conductor (CICC) and the conduit alloy is JK2LB. The production grade conduit alloy (and it’s welds) must meet strict requirements for strength, toughness, fatigue crack resistance, and fabricability. The conduit alloy must retain good mechanical properties after additional fabrication steps such as welding, coil winding strain and...
Dr
Alexander Molodyk
(SuperOx)
30/06/2015, 16:30
ICMC-02 - RE123 Conductors Processing and Properties
Invited Oral Presentation
SuperOx manufactures and markets high current, low cost 2G HTS tapes for HTS devices. Our core manufacturing technology includes the IBAD-MgO texturing on strong, non-magnetic Hastelloy substrates to make buffer templates and the PLD growth of the GdBCO layer.
At present we offer tapes with single lengths over 300 m and Ic (77 K, s.f.) of 300-500 A/12 mm and 100-150 A/4 mm. SuperOx...
Taketsune Nakamura
(Kyoto University)
30/06/2015, 16:30
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
Our research group has developed 20 kW class High Temperature Superconductor (HTS) Induction/Synchronous Motor (HTS-ISM) for the realization of low carbon emission transportation systems, such as ship, train, bus, track, middle sized automobile. We have developed (1) high efficiency and high torque density HTS-ISM, (2) optimal operation code for the variable speed and/or torque control, (3)...
Bill Notardonato
(NASA Kennedy Space Center)
30/06/2015, 16:30
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
NASA operations for handling cryogens in ground support equipment have not changed substantially in 50 years, despite major technology advances in the field of cryogenics. NASA loses approximately 50% of the hydrogen purchased because of a continuous heat leak into ground and flight vessels, transient chill down of warm cryogenic equipment, liquid bleeds, and vent losses. NASA Kennedy Space...
Dr
Tripti Sekhar Datta
(Inter- University Accelerator Centre. New Delhi. India)
30/06/2015, 16:30
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
The heavy ion superconducting linear accelerator as a booster of 15 UD pelletron accelerator is commissioned and operating for more than a year. The acceleration is achieved by a series of superconducting quarter wave bulk niobium cavities at 4.2 K. In the first phase, accelerator was partly commissioned with 8 cavities in first linac cryomodule along with superbuncher and rebuncher. In the...
Dr
Gerard Willering
(CERN)
30/06/2015, 16:30
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
During quench tests in 2010 variations in resistance of an order of magnitude were found in the diode by-pass circuit of main LHC magnets. An investigation campaign was started to understand the source, the occurrence and the impact of the high resistances. Many tests were performed offline in the SM18 test facility with a focus on the contact resistance of the diode to heat sink contact and...
Dr
Jan Sas
(The Karlsruhe Institute of Technology)
30/06/2015, 16:30
ICMC-14 - Cryogenic Materials Testing and Methods
Contributed Oral Presentation
Due to the increasing demand onperformance for all materials used in superconducting magnet systems possibilities of increasing the mechanical performance of austenitic stainless steel is investigated. Especially at cryogenic conditions e.g. at liquid Helium temperature a variety of superconducting applications are realized.
The aim of this work is to investigate the mechanical properties of...
Jennifer Marquardt
(Ball)
30/06/2015, 16:45
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
Since the 1960s on the Gemini program, Beech Aircraft and now Ball Aerospace have been designing and manufacturing dewars for a variety of cryogens including liquid hydrogen and oxygen. These dewars flew on Gemini, Apollo, Skylab and Space Shuttle providing fuel cell reactants resulting in over 150 manned spaceflights. Since Space Shuttle, Ball has also built the liquid hydrogen fuel tanks for...
Dr
Arman Nyilas
(Cryogenic Engineering & Materials Expertise)
30/06/2015, 16:45
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
Fracture toughness of a forging material Nitronic 50 (ASTM A182 F XM-19) was investigated at 4.2 K. The L-T and L-S specimens were used in this study. The expected directions of crack propagation for these specimens are parallel to the width (long transverse) direction and the thickness (short transverse) direction, respectively. In the fatigue pre-cracking for both specimens and J-tests of...
Holger Kollmus
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
30/06/2015, 16:45
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
At the site of the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt (Germany) the international accelerator Facility for Antiproton and Ion Research (FAIR) is currently under construction. FAIR is going to be one of the largest research facilities worldwide. In its accelerator chain there will be two large machines with superconducting magnets, the heavy-ion synchrotron SIS100 and...
Ian PONG
(L)
30/06/2015, 16:45
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
The LHC-Accelerator Research Program (LARP) has been designing and fabricating R&D magnets for the High Luminosity Upgrade (U.S.- Hi-Lumi) for over ten years. The magnets require keystoned Nb3Sn Rutherford cables in minimum unit lengths of up to 500 m. The cables are fabricated from wires with different diameter and filament layouts of RRP® fabricated by Oxford Superconducting Technology....
John Jurns
(European Spallation Source ESS AB)
30/06/2015, 16:45
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
The European Spallation Source (ESS) project is a neutron spallation source research facility currently being designed and built outside of Lund, Sweden. A linear accelerator delivers a 5 MW, 2.0 GeV, 62.5 mA proton beam to a spallation target to generate fast neutrons. Supercritical hydrogen circulates through two moderators surrounding the target, and transforms the fast neutrons emitted...
Flavio Brighenti
(Karlsruhe Institute of Technology)
30/06/2015, 17:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
Wind and FV parks raise the issue of a discontinuous electrical generation. The unavoidable demand for a buffering system that balances the grid is binding as is the need for new solutions. As energy carrier with its high volumetric energy density, liquid hydrogen is an inevitable choice for large-scale energy storage. But, since balancing loads or rapidly evolving fluctuations on the grid...
Drew Hazelton
(SuperPower Inc.)
30/06/2015, 17:00
ICMC-02 - RE123 Conductors Processing and Properties
Contributed Oral Presentation
Advancements in 2G HTS conductor performance continue to drive the operating limits for a broad range of demanding applications. The design, testing and fabrication technology of 2G HTS (RE)BCO conductors is presented, highlighting the ability of 2G HTS wire to function under a wide range of operating conditions. SuperPower continues to address 2G HTS conductor development and production...
Simon CRISPEL
(AIR LIQUIDE)
30/06/2015, 17:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) is proposed as the first facility of Turkish Accelerator Center (TAC) Project. It aims to be the first user laboratory in the region of Turkey in which both electromagnetic radiation and particles will be used. Main purpose of the facility is to use IR FEL for research in material science, nonlinear optics, semiconductors,...
Dr
Antonio della Corte
(ENEA - C.R. Frascati, Italy)
30/06/2015, 17:00
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
A wide bore superconducting solenoid is the core of the NAFASSY (NAtional FAcility for Superconducting SYstems) test facility, which is under construction at the University of Salerno. The NAFASSY laboratory is a joint program among University of Salerno, ENEA, CRdC and INFN under the financial support of the Italian Ministry for University and Research. The facility, hosted in a new building,...
Dr
Ida Westermann
(Norwegian University of Science and Technology)
30/06/2015, 17:00
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
Fracture analysis of a standard construction steel ship deck, which had been exposed to a liquid nitrogen spill, showed that the brittle fracture started at a flaw in the weld as a consequence of low-temperature embrittlement and thermal stresses experienced by the material. In the present study, the permanent effect of a cryogenic spill on the fracture properties of carbon steels has been...
Dr
Barry Meneghelli
(VENCORE - Kennedy Space Center)
30/06/2015, 17:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
Rocket propulsion testing depends, to a large extent, on the quality of liquid oxygen to ensure reliable system performance. Impurities within liquid oxygen may not only degrade test article combustion performance, but in sufficiently high concentrations could react with oxygen or cause an ignition in facility systems. Combustible contaminants in liquid oxygen can be classified as “total...
Dr
Jiuce Sun
(Karlsruhe Institute of Technology)
30/06/2015, 17:15
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
The needs for high power offshore wind turbine are increasing continuously together with the rapid development of the wind power market. Superconductivity may be the only technology to scale wind turbines up to 10 MW and beyond by reduction of the nacelle mass. Accordingly, a superconducting 10 MW wind turbine concept for offshore applications is currently under development within the...
Toshio OGATA
(National Institute for Materials Science)
30/06/2015, 17:15
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
Hydrogen environment embrittlement (HEE) on austenitic stainless steels SUS304, 304L, and 316L in the high pressure hydrogen gas was evaluated from ambient temperature to 20 K using a very simple mechanical properties testing procedure. In the method, the high-pressure hydrogen environment is produced just inside the hole in the specimen and the specimen is cooled in a cooled-alcohol dewar and...
Thomas Eisel
(GSI)
30/06/2015, 17:15
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
In the coming years a new international accelerator Facility for Antiproton and Ion Research (FAIR), one of the largest research projects worldwide, will be build close to Darmstadt in Germany. FAIR will provide antiproton and ion beams with unprecedented intensity and quality. One of its major accelerators will be the SIS100 having a circumference of about 1100 meters. The SIS100 tunnel will...
Jaime Toro Medina
(NASA Kennedy Space Center)
30/06/2015, 17:15
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
Technologies in the fields of cryogenic components and control systems is constantly evolving to advance the state of current cryogenic operations that will support future space exploration missions. To meet new demanding requirements, these missions will increasingly rely upon research and development in energy-efficient storage, transfer and use of cryogens and cryogenic propellants on Earth...
Philippe Masson
(University of Houston)
30/06/2015, 17:15
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
Large power direct drive superconducting generators for off-shore wind turbines show promise for competitive cost of energy and would enable the deployment of wind turbine outputting 10 MW or more. As part of an ARPA-e project, a 10 MW generator was optimized based on YBCO excitation coils. The rotor is using an iron core in order to reduce the amount of HTS required and lead to an acceptable...
Arend Nijhuis
(University of Twente)
30/06/2015, 17:15
ICMC-02 - RE123 Conductors Processing and Properties
Contributed Oral Presentation
For high current REBCO superconductors in high magnet fields with currents in the order of 50 kA, single coated conductors must be assembled in a cable. The geometry of such a cable is mostly such that combined torsion, axial and transverse loading states are anticipated in the tapes and tape joints. A set of experimental setups as well as a convenient and accurate method of stress-strain...
Dr
Edgar Canavan
(NASA–Goddard Space Flight Center)
30/06/2015, 17:30
ICMC-02 - RE123 Conductors Processing and Properties
Contributed Oral Presentation
Solder joints between YBCO coated conductors and normal metal traces have been analyzed as part of an effort to develop a robust HTS lead assembly for a spaceflight mission. Measurements included critical current and current transfer profiles. X-ray micrographs were used to verify proper solder flow and to determine the extent of voiding. SEM of cross-sections with XDS analysis were crucial...
Mr
David Grillot
(Air liquide)
30/06/2015, 17:30
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
What was the last year Helium market figure ?
How has changed the worldwide Helium sourcing balance and "center of gravity" ?
Do we have to expect a continuous shortage period for the next 10 years or, on the contrary, will the market be over-supplied by the next coming large scale production units ?
Facts will be presented on all these questions, view is given by Air Liquide, one of...
Jaroslaw Polinski
(Wroclaw University of Technology)
30/06/2015, 17:30
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
In order to reduce the atmosphere pollution generated by ships the International Marine Organization has established the Emission Controlled Areas. In this areas nitrogen oxides, sulphur oxides and particulates emission is strongly controlled. From beginning of 2015 the ECA covers waters 200 nautical miles from the coast of US and Canada, US Caribbean Sea area, the Baltic Sea , North Sea and...
soumen kar
(Inter-University Accelerator Centre)
30/06/2015, 17:30
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
One of the important features of any conduction-cooled LTS coil is to achieve thermal stability against any thermal disturbances as the minimum quench energy of a NbTi coil is very minimal.The thermal stability of the conduction-cooled magnet system will be governed by the energy balance at the NbTi coil. The cryogen-free magnets are cooled using cryocooler alone through the conductive thermal...
Prof.
Osamu Umezawa
(Yokohama National University)
30/06/2015, 17:30
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
The National Research Institute for Metals (NRIM: now NIMS) has accumulated physical and mechanical properties at cryogenic temperatures for structural alloys since 1980s. As a part of the work, electrical resistivity, magnetization, thermal conductivity and tensile properties were determined at cryogenic temperatures for precipitation hardened copper-based alloys as well as OFHC Cu in the...
Mr
Jan Patrick Meier
(GSI Helmholtzzentrum für Schwerionenforschung GmbH), Mr
Jorge Ceballos Velasco
(GSI Helmholtzzentrum für Schwerionenforschung GmbH)
30/06/2015, 17:45
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
The FAIR project evolves and builds an international accelerator and experimental facility for basic research activities in various fields of modern physics. Within the course of this project, integrated Quadrupole Doublet Modules (QDMs) are in development. The QDMs provide two superconducting main quadrupoles (focusing and defocusing), corrector magnets, cryogenic collimators and beam...
Prof.
KANCHAN CHOWDHURY
(Cryogenic Engineering Centre, Indian Institute of Technology), Prof.
PARTHASARATHI GHOSH
(Cryogenic Engineering Centre, Indian Institute of Technology)
30/06/2015, 17:45
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
Boil-off gas (BOG) generation and its handling is an important issue in LNG value chain because of economic, energy and safety reasons. Absorption of BOG in high pressure subcooled LNG facilitates liquid pumping and avoids the necessity of high-energy gas-compression. Condensation of BOG by nitrogen refrigeration cycle ensures returning of condensed BOG back to storage tank. Reverse Brayton...
Prof.
Jiangtao Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
30/06/2015, 17:45
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
High-entropy alloys consist of multiple elements with different crystal structures but can crystallize as a single phase. Recently, we developed a new technique to prepare high-entropy alloys, which is called high-gravity combustion synthesis. In the new technique, high-entropy alloys are produced by rapid solidification of hot melts from highly-exothermic aluminothermic reactions....
Dr
Charles Rong
(U.S. Army Research Laboratory)
30/06/2015, 17:45
ICMC-02 - RE123 Conductors Processing and Properties
Contributed Oral Presentation
We will report recent experimental observations of persistent current in closed loops made out of the currently manufactured coated conductors. Two types of coated conductors were investigated. One was developed for high magnetic field application and the other for cable applications. Data was taken in the range of 23K to 38K with the persistent current being induced by field cooling the loops...
Michael Armstrong
(Rolls-Royce North American Technologies Inc)
01/07/2015, 08:15
CEC-01 - Large-Scale Refrigeration and Liquefaction
Plenary
Current developments in superconducting and cryogenics technologies offer the potential for dramatic impacts on the future of aviation. The prospective of a modular means for high power dense and highly efficient power transmission is an attractive enabler for decoupling the production of power from the production of thrust on an aircraft. The resulting spatial flexibility removes critical...
Dr
François BONNE
(CEA/SBT)
01/07/2015, 09:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
In this article, we present a new Simulink library of cryogenics components (such as valve, phase separator, mixer, heat exchanger…) to assemble to generate model-based control schemes. Every component is described by its algebraic or differential equation and can be assembled with others to build the dynamical model of a complete refrigerator or the model of a subpart of it. The obtained...
Cecile Gondrand
(Air Liquide Advanced Technologies)
01/07/2015, 09:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
Strong of 60 years of innovation and design in the field of cryogenic turbomachines, Air Liquide Advanced Technologies is constantly developing new products. The first cryogenic helium pump of Air Liquide standard range of cryomachine was commissioned successfully in 2014. The compression map of the pump was measured and in very good accordance with the calculations. The same motor cartridge...
Nandhini Dhanaraj
(Fermi National Accelerator Laboratory)
01/07/2015, 09:00
CEC-06 - Superconducting Magnet Systems
Poster Presentation
Thermosiphon cooling scheme is a productive way of cooling large scale superconducting magnets. The absence of active pumping and the availability of the higher heat capacity parameter “latent heat” make this an attractive cooling method. Nevertheless, the design of such a system demands a well-organized study of the effect of various flow parameters, such as, mass flow rates, flow quality,...
Ms
Kavita Selva
(Clear Lake High School)
01/07/2015, 09:00
ICMC-02 - RE123 Conductors Processing and Properties
Poster Presentation
Thin film superconductor tapes are composites with 98% metallic content and so, Trapped Field Magnets (TFMs) using such tapes can be much more robust than those using bulk superconductors. Trapped magnetic field profiles were investigated in Zr-added (Gd,Y)Ba2Cu3Ox tapes stacked in a criss cross configuration with three 12 mm wide tapes per layer. A crisscross arrangement of the tapes was...
Robert Duckworth
(Oak Ridge National Laboratory)
01/07/2015, 09:00
CEC-06 - Superconducting Magnet Systems
Poster Presentation
In order to determine long term performance of plasma facing components such as diverters and first walls for fusion devices, next generation plasma generators are needed. A Material Plasma Exposure eXperiment (MPEX) has been proposed to address this need through the generation of plasmas in front of the target with electron temperatures of 1-15 eV and electron densities of 1020 to 1021 m-3...
Dr
YOSHIKATSU HIRATSUKA
(Technology Research Center, Sumitomo Heavy Industries, Ltd.)
01/07/2015, 09:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Contributed Oral Presentation
The superconducting single photon detection (SSPD) system has been researched and developed the miniaturization of Gifford-McMahon (GM) cryocooler (SRDK-101D, Sumitomo Heavy Indstries, LTD) that occupies many of system volume for using it in the vehicle,. Total volume of the commercial cryocooler expander and the cryostat should be down about 2/3 and the compressor unit (CNA-11) should be...
Mr
Tianbiao He
(Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University)
01/07/2015, 09:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
With the increase demand of energy, natural gas has remained the fastest increasing fossil energy resource in the world recently. Since the gap between natural gas consumption and production is very large, more and more attentions have been shifted to some isolate small natural gas reservoirs which were previously considered to be too remote and costly to develop. Due to the small flow rate of...
Tengming Shen
(Fermilab)
01/07/2015, 09:00
ICMC-03 - BSCCO Processing and Properties
Poster Presentation
Critical current measurement for Ag/Bi-2212 wires has been typically performed by mounting a short sample (4-10 cm long) heat treated standalone at ~830 °C on a room temperature G-10 sample holder and cooling them down to cryogenic temperatures. During this process samples experience a huge temperature and strain change. This strain effect has not been carefully considered for critical...
Cory Myers
(Ohio State University)
01/07/2015, 09:00
ICMC-02 - RE123 Conductors Processing and Properties
Poster Presentation
In this work susceptometry was used to measure the magnetization, as a function of transverse applied magnetic field, sample temperature, and transport current of an IBAD coated conductor. The M-H loops of four samples of the conductor which had different lengths (from 12-4 mm), and which were approximately 3 cm in length and approximately 100 µm in thickness, were measured. The widths were...
Dr
Masahiro Shiotsu
(Kyoto University)
01/07/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Knowledge of film boiling heat transfer from a heated wire to forced flow of liquid hydrogen or liquid nitrogen in a narrow gap is important for conductor design and quench analysis of superconducting magnets wound with high-Tc cable in conduit conductor (CICC). However there have been few experimental data as far as we know.
Film boiling heat transfer coefficients in liquid hydrogen were...
daisuke Higa
(Kyoto university)
01/07/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
The knowledge of forced flow heat transfer of low temperature hydrogen under supercritical pressure is important for designing superconducting magnets wound with cable in conduit conductor.
Forced flow heat transfer of hydrogen from a round wire in a vertically-mounted pipe was measured at the pressure of 1.5 MPa and the temperature of 21 K by applying electrical current to give an...
Ms
Isabel Catarino
(LIBPhys-UNL, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa), Mr
Jorge Barreto
(LIBPhys-UNL, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa)
01/07/2015, 09:00
CEC-17 - Novel Concepts and New Devices
Poster Presentation
Cryogen-free superconducting magnet systems (CFMS) have become popular over the last two decades for the simple reason that the use of liquid helium is rather cumbersome and that helium is a scarce resource. Some available CFMS use a mechanical cryocooler as the magnet’s cold source. However, the variable temperature inserts (VTI), for any CFMS, are not cryogen-free as they are still based on...
Yuan Yang
(OSU)
01/07/2015, 09:00
ICMC-04 - MgB2 Processing and Properties
Poster Presentation
The influence of strand bending and twisting on the critical current density, Jc, and n-value of MgB2 multifilamentary strands were evaluated, and the field and temperature dependence of the transport properties was evaluated for MgB2 strands. Two types of MgB2 strands were fabricated; (i) advanced internal magnesium infiltration method (AIMI) strands, and (ii) powder in tube method (PIT) type...
Mr
ASHISH ALEX SAM
(Cryogenic Engineering Centre, Indian Institute of Technology Kharagpur, India), Prof.
PARTHASARATHI GHOSH
(Cryogenic Engineering Centre, Indian Institute of Technology Kharagpur, India)
01/07/2015, 09:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
Helium liquefaction and refrigeration plants are an essential part of nuclear fusion reactors, particle accelerators etc. The thermodynamic efficiency of these plants depends upon the performance of the turboexpander which is the main cold generating component and therefore they should be designed for higher thermodynamic efficiencies. Balje’s ns – ds chart, which is a contour of isentropic...
Dr
Philip Michael
(MIT - Plasma Science and Fusion Center)
01/07/2015, 09:00
ICMC-12 - Insulation and Impregnation Materials
Poster Presentation
Large-scale superconductor applications, like fusion magnets, require high-current capacity conductors to limit system inductance and peak operating voltage. Several cabling methods using high temperature superconductor (HTS) tape are presently under development so that the unique high-field, high-current-density, high operating temperature characteristics of 2nd generation ReBCO coated...
Mr
Guochao Feng
(Technical Institute of Physics and Chemistry of Chinese Academy of Science), Mr
Linghui Gong
(Technical Institute of Physics and Chemistry of Chinese Academy of Science), Mr
Peng Xu
(Technical Institute of Physics and Chemistry of Chinese Academy of Science)
01/07/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Wall-type heat exchanger(WTHX) and Fin-type heat exchanger(FTHX) are attached to the first and second stage cold head of two G-M crycoolers respectively in the simulating experimental platform of the internal purifier(SEPEIP). WTHX and FTHX play a significant role in SEPEIP, WTHX is designed to remove heat from helium and freeze-out extremely few impurities, FTHX is for further cooling the...
Sonja Schlachter
(Karlsruhe Institute of Technology)
01/07/2015, 09:00
CEC-06 - Superconducting Magnet Systems
Poster Presentation
In the framework of the Helmholtz-Russia Joint Research Group “COMBIT” a conduction-cooled HTS magnet has been designed and built for a radio blackout mitigation experiment. Radio blackout phases often occur during hypersonic or reentry flight of space vehicles. A dense plasma layer created during hypersonic or re-entry flight leads to attenuation or reflection of radio waves and therefore to...
Prof.
Parthasarathi Ghosh
(Cryogenic engineering centre, Indian Institute of Technology Kharagpur, India)
01/07/2015, 09:00
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
*For manned space mission and deep space probe, reusable launch vehicles are envisaged to be utilized with high fidelity. For low cost, high impulse, long endurance mission with high execution and high reliability, hence demand to be curtailed the inert weight and thereby increasing the delivered payload. Turbopump (TP) feed system for a liquid rocket engine has the highest power to weight...
Dr
JunJie LI
(High Magnetic Field Laboratory, Chinese Academy Sciences), Prof.
Zheng Rong OUYANG
(High Magnetic Field Laboratory, Chinese Academy Sciences)
01/07/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
The 40T hybrid magnet under construction at High Magnetic Field Laboratory of Chinese Academy Sciences (CHMFL) consists of resistive inserts and an 11T superconducting outsert with a clear bore of 800 mm. The outsert made of Nb3Sn CICC is cooled with forced flow supercritical helium at 4.5 K. The main cryogenic system includes a helium refrigerator (360W@4.5K) and a helium distribution system...
Elijah Shoemake
(HYdrogen Properties for Energy Research (HYPER) Laboratory, Washington State University)
01/07/2015, 09:00
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
Advances in additive manufacturing technology have made 3D printing a viable solution for many industries, allowing for the manufacture of designs that could not be made through traditional subtractive methods. Applicability of additive manufacturing in cryogenic applications is hindered, however, by a lack of accurate material properties at cryogenic temperatures. Nylon, commonly used in...
Mr
Liujin Pei
(Fermi National Accelerator Laboratory)
01/07/2015, 09:00
The Muon Campus (MC) is able to measure muon g-2 with high precision and comparing its value to the theoretical prediction. The MC has four 300 KW screw compressors, four liquid helium refrigerators. The centerpiece of the muon g-2 experiment at Fermilab is a large, 50-foot-diameter superconducting muon storage ring. This one-of-a-kind ring, made of steel, aluminum and superconducting wire,...
Yuko Shiroyanagi
(Argonne National Laboratory)
01/07/2015, 09:00
CEC-06 - Superconducting Magnet Systems
Poster Presentation
A cryocooler-cooled superconducting undulator (SCU0) has been operating in the Advanced Photon Source (APS) storage ring since January of 2013. Based on lessons learned from the construction and operation of SCU0, the 2nd superconducting undulator (SCU1) has been built and cold tested stand-alone. An excess cooling capacity measurement and static heat load analysis show a large improvement...
Nadezda Bagrets
(Karlsruhe Institute of Technology – KIT)
01/07/2015, 09:00
ICMC-12 - Insulation and Impregnation Materials
Poster Presentation
In the growing field of HTS applications, finding an appropriate impregnation material for cables and coils remains a challenging task.
In HTS cables and coils, tapes have to be able to withstand mechanical loads during operation. Impregnation is playing a role of mechanical stabilization. However, material properties usually change significantly when going to low temperatures that can...
Dr
Klaus-Peter Weiss
(KIT, Institute for Technical Physics)
01/07/2015, 09:00
ICMC-12 - Insulation and Impregnation Materials
Poster Presentation
Insulating materials for use in cryogenic boundary conditions are still limited to a proved selection as Polyamid, Glasfiber reinforced resins, PEEK, Vespel etc. These materials are usually formed to parts by mechanical machining or sometimes by cast methods. Shaping complex geometries in one piece is limited. Innovative 3D printing is now an upcoming revolutionary technology to construct...
roberto zanino
(politecnico di torino)
01/07/2015, 09:00
CEC-06 - Superconducting Magnet Systems
Poster Presentation
The HELIOS facility at CEA Grenoble is a supercritical helium (SHe) loop for the study of pulsed heat loads effects on the cryogenic cooling system as typical of superconducting tokamak operation. In order to avoid instabilities in the refrigerator, mitigation strategies with a thermal buffer have been investigated to smooth the pulsed heat loads.
In the standard HELIOS configuration no...
HIDEKI TATSUMOTO
(Japan Atomic Energy Agency)
01/07/2015, 09:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Liquid hydrogen has been used as a fuel for a rocket engine and moderator material for cold neutron source. Recently, it is expected as a coolant for high-Tc superconducting devices because of its excellent cooling properties. The knowledge of transient heat transfer in forced flow of liquid hydrogen is necessary for the cooling design. However, there have been no experimental data on the...
carlo ferdeghini
(CNR)
01/07/2015, 11:00
ICMC-07 - Pnictides and New Superconducting Materials
Invited Oral Presentation
Among the various families of Fe-based superconductors, iron chalcogenides, while present a transition temperature not particularly high, show great advantages for potential applications in high field, albeit at liquid helium temperature.
In thin films, the strain can push the critical temperature up to 21K, the critical field up to more than 50 T and the irreversibility field close to this...
Alexey Koveshnikov
(TRIUMF)
01/07/2015, 11:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
The Advanced Rare IsotopE Laboratory (ARIEL) is a major expansion of the Isotope Separator and Accelerator (ISAC) facility at TRIUMF. A key part of the ARIEL project is a 10 mA 50 MeV continuous-wave superconducting radiofrequency (SRF) electron linear accelerator (e-linac). The 1.3 GHz SRF cavities are operated at 2 K. HELIAL LL helium liquefier by Air Liquide Advanced Technologies (ALAT)...
Ian Richardson
(Washington State University)
01/07/2015, 11:00
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Although cryogenic helium-hydrogen mixture properties remain essential to modeling long-duration propellant storage, the property measurements and models have not been extensively studied in nearly 50 years. The majority of the available measurements are vapor-liquid-equilibrium (VLE) with little or no pressure-volume-temperature-composition (PVT-x) measurements which are important for...
Guangze Li
(The Ohio State University)
01/07/2015, 11:00
ICMC-04 - MgB2 Processing and Properties
Contributed Oral Presentation
Significantly enhanced critical current density (Jc) for MgB2 superconducting wires can be obtained following the advanced internal Mg infiltration (AIMI) route. But unless suitable precautions are taken, the AIMI-processed MgB2 wires will exhibit incomplete MgB2 layer formation, i.e. reduced superconductor core size and hence suppressed current-carrying capability. Therefore, it is crucial to...
Mingyao Xu
(Sumitomo Heavy Industries, Ltd.)
01/07/2015, 11:00
A novel GM cycle, called as asymmetric GM cycle is proposed. In an asymmetric GM cycle, the displacer moves slowly when it is close to the upper dead point, but moves rapidly when it is close to the lower dead point. Therefore, the expansion process is longer, while the discharging process is shorter than that in a conventional GM cycle. Meanwhile, the duration of the charging process can be...
Mr
C. Hudson DeLee
(NASA GSFC), Mr
Robert Boyle
(NASA)
01/07/2015, 11:00
The progress of the Robotic Resupply Mission III (RRM III) Cryogen Demonstration System (CDS), an on-orbit experiment to store, transfer and solidify a cryogen, is described. This experiment would demonstrate techniques for resupplying science missions that use liquid or solid cryogens. RRM III has progressed through System Requirements Review, and is moving towards Preliminary Design...
Mr
Mike Tomsic
(Hyper Tech Research)
01/07/2015, 11:15
ICMC-04 - MgB2 Processing and Properties
Invited Oral Presentation
Hyper Tech Research will report on progress that has been made on developing magnesium diboride superconductor wires for research and commercialization efforts, with a specific emphasis on relating superconductor properties to the requirements of the application. The status of Hyper Tech Research’s current demonstration projects for fabricating MgB2 wire and coils for MRI, FCL, motors, and...
Peter Knudsen
(Jefferson Lab)
01/07/2015, 11:15
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The new 4.5 K refrigerator system at the Jefferson Lab (JLab) Central Helium Liquefier (CHL-2) for the 12 GeV upgrade was commissioned in late spring of 2013, following the commissioning of the new compressor system, and has been supporting 12 GeV LINAC commissioning since that time. The six design modes were tested during commissioning, consisting of a maximum capacity condition, nominal...
Sastry Pamidi
(The Florida State University)
01/07/2015, 11:15
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Various high temperature superconducting (HTS) power system components have been demonstrated using liquid nitrogen as the cryogen. Gaseous helium is being explored as a viable option for cooling HTS power devices. One of the major advantages of using helium is the versatility of operating temperature of HTS systems that provides adaptable and compact power distribution networks. However,...
Dr
Xihuan Hao
(Advanced Research Systems, Inc.)
01/07/2015, 11:15
High cooling power 4.2 K stage cryocoolers are in high demand, given their broad applications in such fields as magnetic resonance imaging (MRI) and low temperature superconductors. ARS has recently designed and developed a high cooling power 4.2 K stage pneumatic-drive G-M cryocooler which achieves a typical cooling power of 1.8 W/4.2 K. Steady input power of our newly developed helium...
Michael DiPirro
(NASA/Goddard Space Flight Center)
01/07/2015, 11:15
The James Webb Space Telescope will operate in space at temperatures lower than 50 K. To test the major parts of the telescope and instruments on the ground requires a very large thermal vacuum chamber with a helium-cooled shroud operating below 20 K. This chamber and shroud are being subjected to a series of 4 preliminary tests to characterize the chamber and the ground support equipment...
Mr
Peter Knudsen
(Jefferson Lab)
01/07/2015, 11:30
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The new compressor system at Jefferson Lab (JLab) for the 12 GeV upgrade was commissioned in the spring of 2013 and incorporates many design changes, discussed in previous publications, to improve the efficiency, reliability and maintainability as compared to previous compressor skids used for this application. The 12 GeV helium compression system has five compressors configured with four...
Rodrigo Barraza
(University of Wisconsin-Madison)
01/07/2015, 11:30
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
The use of mixed gas working fluids has become common in Joule–Thomson (JT) type cryocoolers for a variety of applications in the cooling temperature range from 80 to 230 K. The thermal efficiency of mixed gas JT cryocoolers is dependent on the optimization of the gas mixture composition. Most optimization methodologies focus on thermodynamic criteria of the cycle because there are very...
Dr
Anatolii Polyanskii
(FSU, NHMFL, ASC)
01/07/2015, 11:30
Low angle grain boundaries (GB) are still the most important current-limiting mechanism operating in rare earth barium copper oxide (REBCO) coated conductors. While Ca-doping is found to improve the transparency of low angle GBs in weak fields at high temperatures, the growing interest of building high field magnets using REBCO coated conductors requires evaluating the effectiveness of...
Nathaniel Garceau
(Hylium Industries Inc.)
01/07/2015, 11:30
A 1 L liquid hydrogen fuel tank has been designed, fabricated and tested to optimize boil-off rate and minimize weight for a 200 W light weight fuel cell in an unmanned aerial vehicle (UAV). A 200 W fuel cell requires maximum flow rate of 2.6 SLPM or less of liquid hydrogen boil-off rate in the fuel tank. After looking at several different insulation schemes, the system was optimized as two...
Qian Bao
(Sumitomo Heavy Industries, Ltd.)
01/07/2015, 11:30
To meet the growing demand for compact cooling solution required by superconducting electronic devices, we developed a two-stage 2K GM cryocooler with cryostat system which can provide 0.1 W / 20 mW cooling power at 45 K / 2.3 K for first and second stage under no-load condition. Nevertheless, with several innovative technologies applied, the total length of expander cylinder is shortened to...
471.
Cool-down acceleration for G-M cryocoolers with thermal oscillations passively damped by helium
Robert Webber
(Hypres, Inc.)
01/07/2015, 11:45
4 K Gifford-McMahon cryocoolers suffer from inherent temperature oscillations which can be a problem for certain attached electronic instrumentation; Sumitomo Heavy Industries has exploited the high volumetric specific heat of super-critical He to quell these oscillations (approx. 10 dB) by strongly thermally linking a separate vessel of He to the second stage; no significant thermal...
Matthew Howell
(UT Battelle/ORNL)
01/07/2015, 11:45
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The helium cryogenic system at Spallation Neutron Source (SNS) provides cooling to 81 superconducting radio frequency cavities. During the first ten years of operation, much operational experience and lessons learned have been gained. The lessons learned include integrated system issues as well as component failures in the areas of mechanical, electrical and controls. Several single point...
Gary Mills
(Ball Aerospace)
01/07/2015, 11:45
The Stratospheric TeraHertz Observatory (STO) is a NASA funded, Long Duration Balloon experiment designed to address a key problem in modern astrophysics: understanding the Life Cycle of the Interstellar Medium. STO surveys a section of the Galactic plane in the dominant interstellar cooling line at 1.9 THz and the important star formation tracer at 1.46 THz, at ~1 arc minute angular...
Dr
Xifeng PAN
(Western Superconducting Technologies Co . Ltd.)
01/07/2015, 11:45
ICMC-04 - MgB2 Processing and Properties
Contributed Oral Presentation
In this paper, we present recent progress of long multifilamentary MgB2 wires and tapes in our group. Now we have fabricated the MgB2 wires with unit length of 1500 m and diameter of 1.0 mm by in-situ Powder-in-Tube (PIT) method using Nb as the barrier and copper as the stabilizer. To improve the strength of wires, the Cu, Cu–Nb and NbTi core was used as the central filament. The Cu–Nb...
Guangze Li
(The Ohio State University)
01/07/2015, 11:45
Various dopants have been investigated for increasing Bc2 in MgB2. Most of these have not been beneficial, with the exception of C or C-bearing materials (increasing 4 K Bc2) and Dy2O3 (at higher temperatures). While Bc2 approximately doubled with C additions at 4.2 K, the high Bc2 results of the thin films have not been replicated in wires. Hence we re-investigate oxygen additions, with a...
Mr
Jacob Hinze
(University of Wisconsin-Madison)
01/07/2015, 11:45
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Mixed refrigerant (MR) working fluids can significantly increase the cooling capacity of a Joule Thomson (JT) cycle. The optimization of MRJT systems has been the subject of substantial research. However, most optimization techniques do not model the recuperator in sufficient detail. For example, the recuperator is usually assumed to have a heat transfer coefficient does not vary with the ...
Matthew Howell
(UT Battelle/ORNL)
01/07/2015, 12:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The Spallation Neutron Source (SNS) linear accelerator consists of 81 superconducting radio frequency (SCRF) cavities cooled to 2.1K by a cryogenic refrigeration system. The 2.1 K cold box consists of four stages of cold compressors with LN2 cooled variable speed motors. Transitioning from 4K operation to 2.1K operation in the cryomodules involves pumping the cryomodules down from...
Raluca Dumitrescu
(Eindhoven University of Technology)
01/07/2015, 12:00
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Contributed Oral Presentation
We evaluate the feasibility of the natural gas liquefaction process with very limited gas treatment or heavy carbons removal. Such reduction in system processing would significantly reduce treatment steps and thus also maintenance costs. Phase transitions in a binary gas mixture of carbon dioxide and methane need be determined. In order to do so, we first focus on homogeneous nucleation...
Mr
Xiaogang Lin
(Sumitomo Heavy Industries,Ltd.)
01/07/2015, 12:00
A high-capacity 4K two-stage pulse tube cryocooler (PTC) with a remote valve unit that produces cooling capacity of 1.5 W at 4.2 K and 36 W at 45 K simultaneously has been under development at Sumitomo Heavy Industries, Ltd. (SHI). The PTC can be used for dilution cryocoolers, magnet cooling and other cryogenic devices. Compared to the SHI 1W commercial PTC Model RP-082B2S, the cooling...
Prof.
Tatiana Prikhna
(Institute for Superhard Materials of the National Academy of Sciences of Ukraine)
01/07/2015, 12:00
The results of the investigations of crystal structure, phase composition, relief, and superconducting characteristics of the oxygen-containing thin films from magnesium diboride (MgB2), which are deposited on the dielectric wafers by a magnetron sputtering of the magnesium diboride targets, are presented. It has been demonstrated that depending on the parameters of the deposition and...
Prof.
Douglas Finnemore
(Ames Laboratory, Iowa State University)
01/07/2015, 12:00
ICMC-04 - MgB2 Processing and Properties
Contributed Oral Presentation
A procedure has been developed for the preparation of small grained magnesium diboride (MgB2) powder by reacting nanometer size boron powder in a magnesium vapor. Plasma synthesized boron powder that has particle sizes ranging from 20 to 300nm was mixed with millimeter size chunks of Mg by rolling stoichiometric amounts of the powders in a sealed cylindrical container under nitrogen gas. This...
Prof.
Tatiana Prikhna
(Institute for Superhard Materials of the National Academy of Sciences of Ukraine)
01/07/2015, 12:15
ICMC-04 - MgB2 Processing and Properties
Contributed Oral Presentation
MgB2-based bulk materials synthesized under 30 MPa – 2 GPa pressure demonstrated an enhanced connectivity, AF ~50–98% compared to other reports (below 50%) and a shielding fraction of 75–100 %. The materials demonstrate high critical current densities, jc, but no strict correlation was found between AF and jc. On the other hand, we found correlations between jc and the distribution of...
Dr
Jens Haenisch
(Karlsruhe Institute for Technology)
01/07/2015, 12:15
ICMC-10 - Flux Pinning and Critical Current
Contributed Oral Presentation
YBa2Cu3O7-x based coated conductors have large potential in such diverse applications as wires/cables, motors/generators, high-field coils, and superconducting permanent magnets, each of them with a certain range of temperature and magnetic field and a certain need in magnitude and isotropicity in critical current density Jc. In order to use the full potential of YBa2Cu3O7-x, it is mandatory...
Prof.
Eric Hellstrom
(Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University)
01/07/2015, 14:00
ICMC-03 - BSCCO Processing and Properties
Invited Oral Presentation
Overpressure (OP) processing Bi-2212 round wire increases Jc and Je in long-length wire to values needed for practical applications in high-field magnets. In the past, OP processing of Bi-2212 coils was limited to small coils ~45 mm OD and ~25 cm long that could fit in the small, horizontal OP furnaces available at ASC and Fermi National Accelerator Laboratory. We worked with a furnace...
Philippe Masson
(University of Houston)
01/07/2015, 14:00
ICMC-09 - HTS Cables
Invited Oral Presentation
The study of large superconducting generators for wind turbines has been ongoing for several years both in Europe and in the US. Several very promising fully and partially superconducting designs have been developed using both YBCO and MgB2 conductors. Most of the activities entails detailed designs and derisking activities, however, no full size prototype has been fabricated and tested yet....
Bernard ROUSSET
(CEA Grenoble),
Christine Hoa
(CEA SBT)
01/07/2015, 14:00
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
During ITER plasma operation, large thermal loads are generated in the stainless steel Toroidal Field (TF) coil casing. To avoid the increase of the TF conductor temperature in Cable in Conducts (CICC), cooling channels are implemented in between conductors and casings inner side, in particular in the plasma facing wall where the most stringent operating conditions in term of magnetic field,...
Scott Courts
(Lake Shore Cryotronics, Inc.)
01/07/2015, 14:00
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Much of the work to develop internationally recognized temperature scales over the past 50 years was performed with thermometers whose sensing elements were constructed from platinum wire, rhodium-iron wire, or doped germanium elements. For high stability the best results were obtained when the sensing element was strain-free mounted which reduced the effects of temperature-induced mechanical...
Ziemowit Malecha
(Wroclaw Univ of Technology)
01/07/2015, 14:00
Modern physics laboratories require very large amounts of cryogenics fluids. Often the fluid must be transported along the tunnels or stored in the underground cavities. Currently there is several ongoing projects where vary large amounts of liquid (LAr) or gaseous Argon (GAr) will be used. One of them is a part of LAGUNA-LBNO (Large Apparatus studying Grand Unification and Neutrino...
Lars Blum
(Linde Kryotechnik AG)
01/07/2015, 14:00
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
The European XFEL project is under construction at DESY in Germany. The superconducting XFEL linac is supplied by the XFEL helium refrigerator plant. This plant consists of two existing refrigerators, which were in service for the HERA storage ring until 2007. Since the XFEL linear accelerator requires cryogenic cooling at 2K, the existing cryogenic infrastructure had to be modified.
Two of...
Rajinikumar Ramalingam
01/07/2015, 14:15
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
The sensor characteristics of a coated Fiber Bragg grating (FBG) cryogenic temperature sensor depends mainly on the coating materials. The sensitivity of the coated FBG can be improved by enhancing the effective thermal strain transfer between the layers and the bare FBG. The dual coated FBG’s has a primary layer and the secondary coating layer. The primary coating layer acts as an...
Dr
Bernd Petersen
(DESY)
01/07/2015, 14:15
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
The European X-ray Free Electron Laser (XFEL), which is under construction at DESY, will produce pulsed electron beam with energy of 17.5 GeV. 800 superconducting niobium 1.3 GHz nine cell cavities and 100 superconducting magnet packages will be installed in 100 cryomodules. Each cryomodule of 12 m total length includes the 2K cold mass and two radiation shields at ca. 5-8K and 40-80K...
laura savoldi
(Politecnico di Torino)
01/07/2015, 14:15
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
Tokamak-type nuclear fusion reactors like ITER, under construction in France, use superconducting (SC) magnets cooled by supercritical helium (SHe) to confine the plasma. The small temperature margin available between operation and quench of the magnet requires a careful design of the magnet operating scenarios to guarantee adequate cooling in all phases. Sophisticated thermal-fluid dynamic...
Dr
Luigi Serio
(CERN)
01/07/2015, 14:30
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
CERN operates and maintains the world largest cryogenic infrastructure ranging from ageing installations feeding detectors, test facilities and general services, to the state-of-the-art cryogenic system serving the flagship LHC machine complex.
After several years of exploitation of a wide range of cryogenic installations and in particular following the last two years major shutdown to...
Yavuz Oz
(National High Magnetic Field Laboratory)
01/07/2015, 14:30
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
It is now understood that the critical current density $J_c$ of Bi-2212 is optimized when the density of the filaments is maximized by overpressure processing. What is not yet clear is the way that the intrinsic current density determined by vortex pinning may be compromised by poor connectivity. Overpressure processing almost completely removes obstructions to the current path introduced by...
Dr
Agnieszka Piotrowska
(Wroclaw University of Technology)
01/07/2015, 14:30
To mitigate the results of potential failures of cryogenic systems a risk analysis should be performed during the system design phase. The risk analysis output is sensitive to input parameters reflecting failure rates of the system elements like welds, pipes, valves, bellows and others. Big helium cryogenic systems are relatively rare and they do not allow to create a data base allowing...
Mr
Jérôme ANDRE
(CEA-SBT, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France)
01/07/2015, 14:30
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
In the framework of the ITER project, the CEA-SBT has been contracted to supply 277 venturi tube flowmeters to measure the distribution of helium in the superconducting magnets of the ITER tokamak. Six sizes of Venturi tube have been designed so as to span a measurable helium flowrate range from 0.1 g/s to 400 g/s. They operate, in nominal conditions, either at 4K or at 300K, and in a nuclear...
Dr
Hirofumi Yamasaki
(National Institute of Advanced Industrial Science and Technology)
01/07/2015, 14:40
CEC-06 - Superconducting Magnet Systems
Invited Oral Presentation
In the field of wind power generation, there is a general trend of developing wind turbines larger than the present 5 MW size because use of larger capacity turbines can increase the total capacity of a wind farm and reduce the cost of power generation. An extension of the conventional technologies (copper coils or permanent magnets) to build gearless, direct-drive generators may result in an...
Gerard Ferlin
(CERN)
01/07/2015, 14:45
CEC-01 - Large-Scale Refrigeration and Liquefaction
Contributed Oral Presentation
Since 2009, the Large Hadron Collider (LHC) is in operation at CERN. The LHC superconducting magnets distributed over eight sectors of 3.3-km long are cooled at 1.9 K in pressurized superfluid helium. The nominal operating temperature of 1.9 K is produced by eight 1.8-K refrigeration units based on centrifugal cold compressors (3 or 4 stages depending to the vendor) combined with warm...
Ms
Carolin Heidt
(Karlsruhe Institute of Technology (KIT))
01/07/2015, 14:45
The sizing of cryogenic safety relief devices requires detailed knowledge on the evolution of the pressure increase in cryostats following hazardous incidents such as the venting of the insulating vacuum with atmospheric air. Based on typical design and operating conditions in liquid helium cryostats, the new test facility PICARD, which stands for Pressure Increase in Cryostats and Analysis of...
Michael Green
(Michigan State University)
01/07/2015, 14:45
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
The two cyclotron gas stopper superconducting solenoid coils were designed to be cooled down and to be kept cold in the range 4.25 K to 4.6 K using three pulse tube coolers per coil. These coolers are designed to produce from 1.4 to 1.7 W per cooler when the cooler first stage is at about 40 K. The cyclotron gas stopper coils are designed that they can be separated while cold, but unpowered....
Prof.
Minoru Takeda
(Kobe University)
01/07/2015, 14:45
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
To establish hydrogen worldwide storage and marine transportation, it is important to develop liquid hydrogen tanks/carriers like liquefied natural gas tanks/carriers as well as a long level sensor such as a superconducting magnesium diboride (MgB2) level sensor. In the case of lengthening the MgB2 level sensor, a whole MgB2 wire needs uniform superconducting characteristics. Long MgB2 wires...
Cory Myers
(Ohio State University)
01/07/2015, 14:45
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
Interfilamentary bridging in Bi2212 conductors influences magnetization levels that are important for accelerator magnet applications. Specifically, bridging-induced magnetization is a linear function of sample length (L) and twist pitch (Lp). Magnetization measurements were made on state of the art Bi2212 strands with an 37 x 18 filament configuration (both as short straight samples and small...
Prof.
Alphons de Waele
(Oswald Elektromotoren GmbH)
01/07/2015, 15:00
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
Superconducting coils in AC application have losses which tend to warm up the coil and so limit the performance. Good thermal contact between the coil and the cooling agent is very important. Cooling by heat conduction is no option since big metallic plates in close contact with the coil generate eddy-current heating. In this research we investigate the possibility of cooling the coil with by...
Peter Shirron
(NASA/GSFC)
01/07/2015, 15:00
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Heat switches are critical to many low temperature applications, where control of heat flow and selective thermal isolation are required. Their designs tend to be driven by the need for the lowest possible off-state conductance, while meeting requirements for on-state conduction. As a result, heat switches tend to be designed as close as possible to the limits of material strength and...
Artur Iluk
(Technical University of Wroclaw)
01/07/2015, 15:00
Helium inventory in big cryogenic systems may be of the order of hundred tons. During the warm up of the machine the helium has to be stored in warm pressurized tanks. A potential rupture of the tank may create a danger to adjacent objects. In order to formulate recommendations concerning storage of compressed gases in close vicinity of nuclear installations, like tokamaks, a thermodynamic...
Dr
Alexander Otto
(Solid Material Solutions, LLC)
01/07/2015, 15:00
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
This paper describes the development of a flexible approach for producing high-purity 2212 powder by low cost, single step aerosol spray pyrolysis (ASP) that also allows for the immediate packing and sealing of the powder into the silver billet, thereby avoiding contamination and agglomeration. Together these vital components form the superconducting filaments in the wire. The impurity content...
Bernard ROUSSET
(CEA Grenoble)
01/07/2015, 15:15
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Power generation in the next decades could be provided by thermo-nuclear fusion reactors like tokamaks.
There inside, the fusion reaction takes place thanks to the generation of plasmas at hundreds of millions of degrees that must be confined magnetically with superconductive coils, cooled down to about 4.4K.
The plasma works cyclically and the coil system is subject to pulsed heat loads...
Mr
Joshua Kellams
(Texas A&M University)
01/07/2015, 15:15
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
A new approach to the preparation of cores for Bi-2212/Ag wire is being developed. Nanoparticle Ag is homogeneously dispersed in Bi-2212 fine powder, and the mixture is uniaxially compressed to form highly textured, cold-sintered core rods. The rods can be assembled with a Ag matrix and drawn to form multifilament wire. Preliminary studies using tablet geometry demonstrate that a non-melt...
Gabriella Rolando
(CERN)
01/07/2015, 15:15
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
The superconducting solenoid of the PANDA experiment at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, is designed to provide a magnetic field of 2 T over a length of about 4 m in a bore of 1.9 m. To allow a warm target feed pipe oriented transversely to the solenoid axis and penetrating through the cryostat and solenoid, the magnet is split into 3 inter-connected...
Dr
Haran Karmaker
(TECO Westinghouse)
01/07/2015, 15:20
CEC-02 - Large-Scale Systems, Facilities, and Testing
Invited Oral Presentation
Design studies for a direct drive superconducting generator rated 2 MW 3.3 kV 18 rpm have been performed using various commercially available superconductors for the field coils. The electromagnetic design is performed using two-dimensional transient nonlinear finite element analysis by following three-step modeling approach. In the first step, an open circuit model is analyzed and the...
Grzegorz Tatkowski
(Fermilab)
01/07/2015, 15:30
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
The Mu2e Transport Solenoid (TS) consists of two separate but similar solenoids, TS-u and TS-d. Each solenoid is in the shape of a quadrant with a centerline radius of approximately 3 m and has a helium cooling loop consisting of 25 vertically oriented rings with diameters ranging from 1 m to 1.25 m connected in series. This cooling loop configuration has been deemed adequate for cooling via...
Dr
Sergiy Putselyk
(Deutsches Elektronen-Synchrotron (DESY))
01/07/2015, 15:30
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Since 2007, the European X-ray Free Electron Laser (XFEL) is being constructed at DESY, Germany. 800 superconducting niobium 1.3 GHz nine cell cavities and 100 superconducting magnet packages will be operated in a liquid helium II bath at 2K. The static and dynamic heat loads at 2K result in a vapour mass flow up to 96 g/s at 3100 Pa. A four stage cold compressor system is used to return the...
YUN ZHANG
(North Carolina State University)
01/07/2015, 15:30
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
Bi2Sr2CaCu2Ox (Bi2212)/Ag multifilamentary wires are manufactured via the powder-in-tube process using oxide powders. The properties of the precursor powders, including stoichiometry, purity, grain size and morphology, packing density and phase assembly, have significant impact on wire properties after heat treatment. Most research has focused on the processing of wire after deformation due to...
Ms
YUN ZHANG
(North Carolina State University)
01/07/2015, 15:45
ICMC-03 - BSCCO Processing and Properties
Contributed Oral Presentation
Bi2Sr2CaCu2Ox (Bi2212)/Ag multifilamentary wires are manufactured via the powder-in-tube process using metallic precursors (MP). After deformation, the MP is converted to Bi2212 by heating in flowing oxygen. Previous results on pellets show that via mechanical alloying, a controlled stoichiometry and homogeneous MP powder was synthesized. The MP powder was then converted to superconducting...
Venkat Selvamanickam
(University of Houston)
01/07/2015, 16:15
ICMC-02 - RE123 Conductors Processing and Properties
Invited Oral Presentation
Superconducting generators are a viable alternative to permanent-magnet-based generators for direct-drive, high-power wind turbines especially because of their potential low operating cost, reduced weight, and near elimination of rare-earth materials. A major challenge with the commercialization of superconducting generators for wind turbines is the high cost of present day’s high temperature...
290.
[Invited] Heat transfer during bubble shrinking in saturated He II under microgravity condition
Suguru Takada
(National Institute for Fusion Science)
01/07/2015, 16:15
CEC-13 - Helium II Properties and Systems
Invited Oral Presentation
Microgravity experiments of He II boiling using a drop tower were carried out. The small cryostat equipped with optical windows and whole the equipment was dropped more than 100 times. Time duration of microgravity environment less than 1 m-g is about 1.2 sec. The process of bubble shrinking in He II in microgravity was observed by a high speed camera with a telecentric lens under the...
Mr
Xuan Tao
(Institute of Refrigeration and Cryogenics,Zhejiang University)
01/07/2015, 16:15
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
Heat exchangers of high efficiency are critical components in cryocoolers, whose performance influences the overall performance of the cryocoolers to a large extent. The entropy generation in heat exchangers primarily is a result of heat transfer across finite temperature difference. The traditional approach is to increase the heat transfer area and heat transfer coefficient so as to reduce...
Milind Atrey
(Indian Institute of Technology Bombay), Dr
Rashmin Damle
(IIT Bombay)
01/07/2015, 16:30
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
Cryogenic temperatures are required for proper functioning of infrared sensors and thermal cameras, space chamber simulations, preservation of biological samples, etc. Such temperatures can be produced by expanding a high pressure gas in a relatively easier way. This is popularly known as the Joule-Thomson (J-T) effect. A typical miniature J-T cryocooler consists of a storage...
Kiruba Haran
(University of Illinois)
01/07/2015, 16:35
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Invited Oral Presentation
Several groups have worked to develop many different types of superconducting (SC) machines, successfully demonstrating different aspects of the technology. In spite of these efforts, commercial adoption has not taken place because of the perceived unfavorable risk/benefit assessment of SC technology. In this talk, we will describe efforts to try and break this impasse by leveraging advances...
Torsten Koettig
(CERN)
01/07/2015, 16:45
CEC-13 - Helium II Properties and Systems
Invited Oral Presentation
Oscillating Superleak Transducers (OSTs) can be used to localize quenches in superconducting radio-frequency cavities. Local hot spots at the cavity surface initiate temperature waves in the surrounding superfluid helium that acts as cooling fluid at typical temperatures in the range of 1.6 K to 2 K. The temperature wave is characterised by the properties of superfluid helium as the second...
Dr
Nir Tzabar
(University of Twente)
01/07/2015, 16:45
Sorption-based Joule-Thomson (JT) cryocoolers often operate with pure gases. A sorption-based compressor has many benefits; however, it is limited by the pressure ratios it can provide. Using a mixed-refrigerant (MR) instead of a pure refrigerant in JT cryocoolers allows working at much lower pressures. Therefore, it is desired to use MRs in sorption-based cryocoolers in order to reduce one...
Mr
Michael Tomsic
(Hyper Tech)
01/07/2015, 16:55
CEC-06 - Superconducting Magnet Systems
Invited Oral Presentation
The desire is for light weight wind turbine generators for both land and offshore wind that can be serviced on top of the wind towers. Hyper Tech has developed a modular concept design so the components can be shipped over conventional highways and assembled on top of a tower. The design can be scaled from 5-20MW. There is also the desire to have low operational and maintenance costs for...
Marcel ter Brake
(University of Twente, The Netherlands)
01/07/2015, 17:00
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
METIS, the Mid-infrared E-ELT Imager and Spectrograph, is one of the proposed instruments for the European Extremely Large Telescope (E-ELT) that will cover the thermal/mid-infrared wavelength range from 3- 14 μm. Its detectors and optics require cryogenic cooling at four temperature levels, 8 K for the N-band detectors, 25 K for the N-band imager, 40 K for the L/M-band detectors and 70 K for...
01/07/2015, 17:15
Prof.
SHRIDHAR BAPAT
(Mechanical Engineering Department, Indian Institute of Technology Bombay, Mumbai 400076, India)
01/07/2015, 17:15
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Contributed Oral Presentation
The requirement of a cryocooler with practically zero vibration and no electromagnetic interference has led to development of sorption compressor based Joule-Thomson (J-T) coolers. The adsorption is carried out at near room temperature and desorption process at an elevated temperature. High pressure is generated due to accumulation of desorbed gases inside the adsorber cell on providing heat...
Prof.
Masahide Murakami
(University of Tsukuba)
01/07/2015, 17:15
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Contributed Oral Presentation
Boiling phenomena in He II were studied on the basis of the flow velocity field derived from flow field visualization and a PIV (Particle Image Velocimetry) measurement. Noisy and silent film boiling modes together with non-boiling state were generated on/around a horizontal planar and a cylindrical heaters. For PIV tracer particles, H2-D2 micro solid particles that were neutrally buoyant in...
romain bruce
(CEA Saclay)
01/07/2015, 17:30
CEC-13 - Helium II Properties and Systems
Contributed Oral Presentation
The cryogenic design of the next generation of superconducting accelerator magnets depends on our ability to simulate the helium heat and mass transfer in the internal structure of these magnets. For that matter accurate tools must be developed such as numerical codes integrating the thermodynamic behavior and phase transition in superfluid helium. Moreover it would also help to understand the...
Mr
Michael Britt
(UPS)
02/07/2015, 08:00
UPS is an engineering company with a large of fleet of trucks. We have been running a "Rolling Laboratory" for many years and believe there are opportunities for many technologies to be deployed to improve the environments we operate in. We have been using LNG since 1999 in our fleet and want to share the following information.
Dr
Antonio Perin
(CERN)
02/07/2015, 09:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
To expand CERN testing capability to superconducting devices that cannot be installed in existing test facilities because of their size and/or mass, CERN is building a new cryogenic test facility for large and heavy devices. The first devices to be tested in the facility will be the S-FRS superconducting magnets for the FAIR project that is currently under construction at the GSI Research...
Alexey Radovinsky
(MIT Plasma Science and Fusion Center),
Philip Michael
(MIT Plasma Science and Fusion Center)
02/07/2015, 09:00
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
Turn-key superconducting magnet systems are increasingly conduction-cooled by cryogenerators. Gifford-McMahon systems are reliable and cost effective, but require annual maintenance. The most common maintenance method is to simply replace the cold head of the cryocooler with a reconditioned one. For conduction-cooled magnets, the direct replacement method requires a complicated design with a...
Prof.
SHRIDHAR BAPAT
(Department of Mechanical Engineering, Indian Institute of Technology Bombay)
02/07/2015, 09:00
CEC-17 - Novel Concepts and New Devices
Contributed Oral Presentation
Stirling cryocoolers are capable of satisfying the contemporary requirements of a low-capacity cooler. A compact mechanism that can drive Stirling cryocooler with larger stroke and thus enhance the cooler performance is the need at present. The increase in the stroke will lead to a higher volumetric efficiency. Hence, a cryocooler with larger stroke will experience higher mass flow rate of the...
Mr
Longyi Wang
(Institute of Refrigeration and Cryogenics, Zhejiang University)
02/07/2015, 09:00
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
A pulse tube cryocooler can not reach the Carnot efficiency basically because the expansion work must be dissipated at the warm end of the pulse tube, thus the ideal efficiency of a PTC is only Tc/Th, which is less than the Carnot efficiency Tc/(Th-Tc). How to recover this amount of dissipated work is a key to improve the PTC efficiency. A cascade PTC is consisted of PTCs those are staged by...
Dr
Chao Wang
(Cryomech)
02/07/2015, 09:15
CEC-17 - Novel Concepts and New Devices
Contributed Oral Presentation
Liquid helium cooled NMR magnets often use liquid nitrogen cooled radiation shields. Among these NMR magnets cryogen boil-off rates of 3L/day of liquid helium and 6L/day of liquid nitrogen are common. We have developed a cryogen recycler for closed loop operation of the helium and nitrogen circuits. With these closed loops, the recycler maintains zero boil-off of both helium and nitrogen. ...
Matthew Perrella
(Georgia Institute of Technology)
02/07/2015, 09:15
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
The regenerator is a critical component of all Stirling and Pulse Tube cryocoolers. It generally consists of a microporous metallic or rare-earth filler material contained within a cylindrical shell. The accurate modeling of the hydrodynamic and thermal behavior of different regenerator materials is crucial to the successful design of cryogenic systems. Previous investigations have used...
Dr
Jie Yuan
(AMSC)
02/07/2015, 09:15
CEC-08 - Cryogenic Power Cables and Leads
Contributed Oral Presentation
In the last decade, significant advances in the performance of second generation (2G) high temperature superconducting wire have made it suitable for commercially viable applications such as electric power cables and fault current limiters. Currently, the U.S. Department of Homeland Security is co-funding the design, development and demonstration of an inherently fault current limiting HTS...
Prof.
Shaowei ZHU
(School of Mechanical Engineering, Tongji University)
02/07/2015, 09:15
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
Solid piston as phase shifter for the second stage of a two-stage pulse tube refrigerator is effective for getting higher performance. If a step displacer is used as the phase shifter, both stages can used higher performance phase shifter. In this paper, a gas separation type two-stage pulse tube refrigerator with the step displacer is discussed with numerical simulation. It is shown that the...
jinhui zhang
(Zhejiang University)
02/07/2015, 09:30
CEC-17 - Novel Concepts and New Devices
Contributed Oral Presentation
Dynamic visualization is of great significance in the research of flow conditions and mass transfer process of cryogenic fluids. At present, spot sampling is commonly used in concentration analysis of cryogenic fluids. However, it cannot provide two-dimensional information for large area and will disturb the fluid. In this paper, a non-contact dynamic optical measurement system using laser...
Alain Girard
(CEA),
Bernard Rousset
(CEA)
02/07/2015, 09:30
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
Recently, CEA Grenoble SBT has designed, built and tested three liquid helium facilities dedicated to turbulence studies.
All these experiments are able to operate either in HeI or HeII within the same cooldown. Another common technical specificity of these three facilities is the use of moving parts inside liquid helium.
The SHREK experiment is a von Karman swirling flow between 72cm...
338.
Experimental verification of cylindrical adjustable inertance tube for pulse tube refrigerators
Prof.
John Pfotenhauer
(Adviser, second author)
02/07/2015, 09:30
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
The performance of the Stirling type pulse tube cryocooler increases significantly with optimal use of an inertance tube. The phase angle produced by the inertance tube is very sensitive to its diameter(s) and length(s). Recent developments are reported here regarding an adjustable inertance tube whose length and diameter can be adjusted in real time during the operation of the cryocooler. The...
Dr
Haishan Cao
(University of Twente)
02/07/2015, 09:45
CEC-17 - Novel Concepts and New Devices
Contributed Oral Presentation
The aim of the Joule Thomson microcooling research at the University of Twente is to develop small and fully integrated cryogenic cooling systems for cooling small electronic devices. In the previous project, we have successfully developed 100 K single-stage microcoolers and 30 K two-stage microcoolers using standard micromachining technology. In the paper, we now present three new...
Patrícia Borges de Sousa
(LIBPhys, Physics Department, Faculty of Sciences and Technology, Universidade Nova de Lisboa)
02/07/2015, 10:00
CEC-17 - Novel Concepts and New Devices
Contributed Oral Presentation
The X-IFU instrument for X-ray observation on ESA’s new ATHENA satellite will employ a complex cryogenic chain for detector-cooling down to 50 mK, similar to the one foreseen for the European SAFARI instrument onboard SPICA (JAXA). A problem that typically arises from the use of such systems is the existence of heat peaks during the recycling stages of some parts that can compromise the...
Mr
Qiyong Zhang
(Institute of Plasma Physics, Chinese Academy of Sciences)
02/07/2015, 10:00
CEC-02 - Large-Scale Systems, Facilities, and Testing
Contributed Oral Presentation
Superconducting magnet of Central Solenoid (CS) model coil of China Fusion Engineering Test Reactor (CFETR) is made of Nb3Sn/NbTi cable-in-conduit conductor (CICC), and operated by forced-flow cooling with a large amount of supercritical helium. The cryogenic circulation pump can be effective to achieve the supercritical helium (SHe) circulation to the forced-flow cooled (FFC) cable-in-conduit...
Dr
Nikolay Tsyrulin
(attocube systems AG)
02/07/2015, 10:30
CEC-17 - Novel Concepts and New Devices
Contributed Oral Presentation
Dimensional changes of solids in varying external conditions such as temperature, pressure, magnetic and electric fields or even light play important role in material science, cryogenic and aerospace engineering. Often the measurements of dimensional changes require high precision combined with ease of use and absence of gravitational effects. We developed a dilatometer based on our miniature...
Prof.
Peng LIN
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-15 - Instrumentation and Controls
Poster Presentation
An apparatus is developed to realize the lambda point of helium used as a temperature fixed point. A two-stage Gifford-McMahon (GM) mechanical refrigerator with the cooling power of 1.5W at 4.2K is employed. A closed-cycle of 4He is used to get the temperature of 1.8K. The helium gas with pressure of 1bar condenses at a pot located the second stage. Then the liquid helium flows into a pump-pot...
Mr
Dai Wei
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
With the advantages of high thermal efficiency, high reliability and compact structure, a free piston Stirling cryocooler with a large cooling capacity at 80 K is very attractive for applications such as natural gas re-condensation and power applications of superconductivity. This article introduces our recent progress on a free piston Stirling cryocooler which was designed based on...
Jean Louis Lizon
(ESO)
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
For the optimal trade-off between dark current, sensitivity, and cosmetics, these detectors need to be operated at a temperature of about 155 K. The detectors mosaic with a total area of 630 cm2 directly facing the Dewar entrance window, is exposed to a considerable radiation heat load. This can only be achieved with a very performing cooling system.
After a short explanation of the LN2...
Liubiao Chen
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS)
CEC-03 - Cryocoolers (Non-Aerospace)
Contributed Oral Presentation
This paper introduces a new structure of Stirling type two-stage cryocooler driven by a linear compressor with an input power of 250W at an operating frequency of 27 Hz. The cryocooler is compact in structure, for both of the two stages have a co-axial configuration and the reservoir of the second stage also works as the radiation shield. The warm end of the second stage is set at the cold end...
Liubiao Chen
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS)
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
This paper introduces a new kind of packed sphere matrix made with ErPr, and analyzes the application in Stirling type pulse tube cryocooler. In pulse tube cryocoolers, ideal regenerator requires regenerator matrix high in specific heat, low in flow resistance and conductive heat loss. However, below the liquid hydrogen temperature the specific heat of stainless steel decreases significantly,...
Mr
Lianyou Xiong
(Technical Institute of Physics and Chemistry , CAS), Mr
Liqiang Liu
(Technical Institute of Physics and Chemistry , CAS)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
The first large scale helium cryoplant with the cooling capacity of 10kW@20K has been successfully developed recently. Considering the large power consumption of this system, energy saving is very important. In this paper, a model which is described with Genetic Algorithm (GA) program and written in VC++ is established to simulate the cryoplant process. In this model, the pressure ratio and...
Prof.
Lai Feng Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
The heat loads of the superconducting magnets in an international fusion device are pulsating with time, which will cause the variation of the return mass flow of the refrigerator.It is necessary to mitigate the fluctuation of the mass flow to avoid the performance degradation of turbines and compressors which designed to operate in a narrow range of mass flow. In this paper, a novel...
Prof.
Lai Feng Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
The accuracy of correlations of colburn(j) and friction(f) factor have important effect on the accuracy of simulation results in the dynamic simulation of large scale helium systems. However，the most available correlations in the literatures and experimental results are used air as heat transfer medium. A steady-state three-dimensional numerical model was built to study the heat transfer and...
Dr
Biju Kuzhiveli
(National Institute of Technology Calicut)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
Attaining cooling effect by using laser induced anti-Stokes florescence in solids appears to have several advantages over conventional mechanical systems and has been the topic of recent analysis and experimental work. Using anti-Stokes fluorescence phenomenon to remove heat from a glass by pumping it with laser light, stands as a pronouncing physical basis for solid state cooling. Cryocooling...
323.
Comparative Study and Electromagnetic Analysis of Linear Drive System for a Stirling Cryocooler
Biju Kuzhiveli
(urn:Facebook)
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
Stirling cryocoolers are becoming more popular in the area of remote sensing and space applications because of their inherent characteristics viz., long life, high reliability, less weight etc. In order to have a good on-board performance, the selection of the compressor drive system is critical. Linear motors are simple in operation by avoiding side forces and the required axial force is...
Mr
Sundeep Ghosh
(Variable Energy Cyclotron Centre)
CEC-06 - Superconducting Magnet Systems
Contributed Oral Presentation
A compact superconducting cyclotron is being designed at Variable Energy Cyclotron Centre, Kolkata, India. This cyclotron shall be dedicated for medical applications specifically in the field of nuclear medicine and therapy. The cyclotron magnet will be made of NbTi superconducting coils wound on an Aluminium former. The coils will be segregated in two halves on either sides of the median...
Dr
Lianyou Xiong
(Technical Institute of Physics and Chemistry, CAS), Dr
Liqiang Liu
(Technical Institute of Physics and Chemistry of CAS-Academia Si)
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Medium-sized tokamak HL-2A has been operated for nearly ten years. In order to increase plasma parameters and extend experimental research space under the condition of higher power auxiliary heating, the HL-2A tokamak has been approved to be modified into HL-2M as the second step for HL-2A project. Cooling power of 300 W at 4.5 K is required to maintain operation of the cryogenic system of...
Ralf Eichhorn
(Cornell University)
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Managing the cryogenic flows inside a state-of-the-art accelerator cryomodule has become a demanding endeavor: In order to build highly efficient modules, all heat transfers are usually intercepted at various temperatures. For a multi-cavity module, operated at 2 K, this requires intercepts at 5 K and at 80 K at different locations with sometimes strongly varying heat loads which for...
William Soyars
(Fermilab)
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
A new helium cryogenic refrigeration system for operating large superconducting solenoid magnets for two future muon experiments at Fermilab has been designed, installed, and operated for initial commissioning. This cryogenic system will support the Muon g-2 and Mu2e experiments at Fermilab’s Muon Campus. Much of the system consists of equipment reused from the Tevatron including gaseous...
Shrikant Pattalwar
(STFC Daresbury Laboratory, UK)
CEC-07 - Superconducting RF Systems
Poster Presentation
A liquid helium cryostat has been developed for the measurement of surface resistance of thin-film coated SRF cavities at high frequencies (7.8 GHz). The technique is based on the measurement of RF power absorbed in the coated film using calorimetry.
The thin film substrate forms the lower end of a pillbox-like cavity, which is separated from the upper-half of the cavity by a vacuum gap....
Dr
El Hadj AILAM
(Univ Khemis Miliana, LESI Lab.)
ICMC-06 - HTS and MgB2 Bulk
Poster Presentation
In this paper an original topology of a superconducting motor is presented. The motor is based on the magnetic flux concentration principle when both superconducting wire and bulk are used. The superconducting wire creates a high homogeneous flux density when the superconducting bulk concentrates this flux density. The obtained flux density is variable in the air-gap of the motor. The inductor...
Dr
Liangbing HU
(Institute of Plasma Physics, Chinese Academy of Sciences), Dr
Zhiwei Zhou
(Institute of Plasma Physics, Chinese Academy of Sciences)
CEC-15 - Instrumentation and Controls
Poster Presentation
A 500W@4.5K helium refrigerator has been designed to provide forced flow cooling of 4.5K supercritical helium for the superconducting coils testing or as a helium liquefier with the capacity of 90L/hr liquefaction rate, and is now in built at the Institute of Plasma Physics, Chinese Academy of Sciences (CASIPP). Its control system is designed and developed based on a Programmable Logic...
Dr
Bo GAO
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-11 - Safety, Reliability, and Standards
Poster Presentation
A new constant pressure refractive index gas thermometer (CPRIT) is proposed that measures the thermodynamic temperatures T from 4.2 K to 24.5 K with a quasi-spherical microwave resonator. The pressure fluctuation plays the essential entry for the measurement uncertainty by traditional refractive index gas thermometers operating above the triple point of water and constant volume gas...
Mr
Qiang LI
(Technical Institute of Physics and Chemistry, CAS)
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
Integrated submerged liquid hydrogen pump was develoed. The whole pump with its driving motor runs in liquid hydrogen. There is no dynamic seal between motor and pump. Only electric wire contacts environment air. The characteristics of pump, experimental device, and results are described in this paper. The speed of the pump can be adjusted from 300 rpm to 1300rpm. The pressure head can be from...
Mrs
HONG ZHANG
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences), Prof.
Junjie WANG
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
The cryogenic treatment can improve wear resistance and mechanical properties of many metallic materials and the improvement is largely affected by the cryogenic treatment condition. In this work, samples of gray cast iron were treated at various cryogenic treatment temperature and cryogenic holding time. The main objective of this work is to investigate the effect of the cryogenic treatment...
Heetae Kim
(Institute for Basic Science)
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
Compared to uniform temperature distribution, thermal radiation properties of nonuniform temperature distribution are different. The effective temperature of cryogenic liquid can be defined for the nonuniform temperature distribution. The effective temperature is defined in one-dimension, two-dimension and three-dimension. The properties of the effective temperature will be presented.
Prof.
Junjie Wang
(Technical Institute of Physics and Chemistry , Chinese Academy of Sciences)
CEC-14 - Thermal Insulation Systems
Poster Presentation
As a cryogenic propellant of aircrafts, liquid oxygen has a low boiling point and can evaporate easily. It’s significant to conduct the research in the orbiting storage of liquid oxygen for deep space exploration. Spray-on foam insulation (SOFI) and Multilayer insulation (MLI) are combined in storage of liquid oxygen. In our research, we built the evaporation test-bed for liquid oxygen...
Dr
gang zhou
(Technical Institute of Physics and Chemistry, CAS)
CEC-15 - Instrumentation and Controls
Poster Presentation
A system for high precise control of the sample temperature using a 4K GM cryocooler is described. The maximum temperature fluctuations in a GM cryocooler without a high heat bath or thermal resistance are typically of the order of 400mK between 4K and 20K. It is particularly difficult to dramaticallydiminishthefluctuation of the sample cooled by the cryocooler at low temperatures. In this...
Prof.
Junjie Wang
(Technical Institute of Physics and Chemistry, CAS)
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
The pressure ratio of Vuilleumier(VM) cryocooler is generally smaller than GM cryocooler, which evidently affects its terminal temperature and refrigeration. In this paper, a detailed study on a VM cryocooler with larger pressure ratio is introduced. By increasing the hot displacer’s stroke distance and shortening its length on the original experimental system which could achieve a no-load...
Dr
Yanjie Liu
(Technical Institute of Physics and Chemistry CAS)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
Key Laboratory of Space Energy Conversion Technologies of TIPC, CAS has developed a 4.5K Joule-Thomson (J-T) refrigerator precooled by a three-stage pulse tube cooler.
In this paper, special attention is paid to the characteristics of the J-T cycle, so a commercial two-stage GM cryocooler is used to provide precooling for the J-T cycle for the purpose of shorten experimental time. The...
Prof.
Tao Yan
(Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences)
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
The aim of present experimental research is to find out the suitable correlations for designing the internally finned heat exchanger used in cryogenic applications. In order to conduct above experimental study, different size of internally finned heat exchangers were developed and tested in cryogenic environments. The experiments were conducted in the range of velocity varies from 0.001m/s to...
Prof.
Wang Junjie
(Technical Institute of Physics and Chemistry)
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
The Vuilleumier (VM) refrigerator, known as heat driven refrigerator, is one kind of closed-cycle Stirling type regenerative refrigerator. The VM refrigerator with power being supplied by liquid nitrogen was proposed by Hogen and developed by Y. Zhou, which shows great potential for development below 10K.
This paper describes the design and development of a VM cryocooler operating below 8K....
Dr
Qiang Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
Large-scale helium cryo-refrigerator is widely used in superconducting systems, nuclear fusion engineering, and scientific researches etc., however, its energy efficiency is quite low. We built a 2kW at 20.0K helium Brayton cryo-refrigerator. As to the characteristics of the plant/cycle, we put forward a model of helium Brayton cryo-refrigerator/cycle according to finite-time thermodynamics....
Prof.
Linghui gong
(Technical Institute of Physics and Chemistry, CAS), Prof.
Liqiang Liu
(Technical Institute of Physics and Chemistry, CAS), Prof.
lianyou xiong
(Technical Institute of Physics and Chemistry, CAS)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
Helium is an invaluable rare gas as it has a lot application in industrial and research. At present, helium is produced mainly from helium bearing natural gas which contains 1~8% helium. However, most of helium reserves dissolved in natural gas is located in only few countries in the world, and the low concentration of helium in Chinese natural gas field makes extracting helium from the...
Mr
Iason Zisis
(TU Eindhoven, The Netherlands)
CEC-10 - Aerospace
Contributed Oral Presentation
Orbiting satellites or manned spacecraft experience hypervelocity impacts from micrometeoroids and space debris. Thin shields are used for their protection, and are typically made of monolithic metals. For better weight-to-strength ratio, the use of metal/epoxy laminates offers an alternative and is investigated in this study.
The Smoothed Particle Hydrodynamics (SPH) numerical method has...
Dr
Jinze Li
(Beijing TIPC)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
Stirling-Type Pulse Tube Cryocooler is widely used in Aerocrafts which are often faced with changing acceleration. While the performance of the cryocooler will decay at the circumstance. Experiments find that both the cryogen’s temperature field in the cold finger and the Compressor’s pistion gap are affected by variable acceleration. A model is made for analyzing the changing of their...
Carl Kirkconnell
(Iris Technology)
CEC-04 - Cryocoolers (Aerospace)
Contributed Oral Presentation
In collaboration with the Jet Propulsion Laboratory, Iris Technology is developing second generation cryocooler control electronics. The present development retains key features from the TRL 6 Low Cost Cryocooler Electronics (LCCE) design. Architected for cost sensitive missions, LCCE and this second generation “LCCE-2” are also extremely robust. Class S active electronic components and...
Mr
Xin Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
Adsorption refrigerators are widely used in various kinds of cryogenic systems in space science. The performance of cooler is directly affected by the adsorption process of activated carbon. We present one adsorption model to describe the whole adsorption process and conduct relevant experiments to improve and optimize the model. This paper also presents experiment results of potential...
Mr
Sergey Shavkin
(NRC "Kurchatov Institute", Moscow, Russia)
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Poster Presentation
It is well known that in NbTi alloys the α-Ti nanostructure demonstrates pinning force anisotropy regarding magnetic field and Lorentz force directions. The investigation of such anisotropy is more appreciable using thin foil than round wires due to the absence of axial averaging. Earlier [1] we described the results of detailed study and developed the model of the critical current anisotropy...
zhenjun zhou
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
Thermodynamic vent system technology is a widely used method to achieve efficient cryogenic propellants storage in aerospace fields, the Joule-Thomson effect of the cryogenic propellants, such as liquid nitrogen, liquid oxygen and liquid hydrogen, is analyzed and calculated based on the thermodynamic vent system, and this will lay a certain foundation for the efficient storage of cryogenic...
Dr
Houlei Chen
(TIPC, Beijing China)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
Pulse tube cryocoolers consist of compressors, cold fingers and phase shifting devices. The cooling performance of pulse tube cryocoolers mainly depend on the following two aspects, the dynamic behaviors of the compressors and the oscillating flow in the regenerators of the cold fingers, which are associated with the phase shifting performance of the phase shift devices.
In this paper, the...
Dr
Leonid Muravey
(RSTU), Dr
Valery Grishin
(ANU)
ICMC-13 - Radiation and Other Degradation Effects
Poster Presentation
The transmission fluxon waves and plasmon waves are considered on Planar Multilayer Superconducting Lattice (PMSL). These nonlinear solitary waves are presented in the form of pulses that can propagate without change of form and without the loss or acquisition of energy. The wave-resistant, that can store information, also moving in the right direction that leads to the interaction with...
Dr
VOLODYMYR SHATERNIK
(G.V.Kurdyumov Institute for Metal Physics)
CEC-17 - Novel Concepts and New Devices
Poster Presentation
In this work, we have proposed, realized and analyzed trilayered Josephson junctions with a resonance-percolation charge transport (see [1] about this) consisting of two superconducting electrodes made of MoRe alloy with a critical temperature of about 10 K separated by a silicon layer of thicknesses up to 30 nm doped by tungsten with 4 - 12 at.%.
We have studied low-temperature (T=4.2...
Krishna Prasai
(California State University Bakersfield)
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
Most chemical processes to extract the Ho-163 isotope and insert it into a detector absorber involve yttrium based compounds. Rather than using yttrium as an intermediate step in the isotope extraction procedure, the metal yttrium silicide (Y5Si3) was a possible candidate to use directly as absorber material. We measured the heat capacity of small Yttrium Silicide (Y5Si3) sample in the...
Prof.
Abdelhamid El kaaouachi
(Faculty of sciebces, University Ibnou Zohr, Agadir, Morocco), Prof.
Jamal Hemine
(Université Hassan II – Mohammedia, Faculté des Sciences Ben M’sik, Avenue Colonel Driss El Harti, B.P.7955, Sidi Othman, Casablanca, Morocco)
ICMC-05 - Thin Films
Poster Presentation
In this work, we present a study of the temperature and carriers density dependence of the electrical transport of high mobility two dimensional hole system grown on the (311) surface of GaAs. At low temperatures, the analysis of the variation of conductivity data shows that a density inhomogeneity in the metallic phase leading to percolation-type transition to an insulating state at a...
Dr
gang zhou
(Technical Institute of Physics and Chemistry, CAS)
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
A numerical study is performed for time-varying natural convection of helium fluid at low temperatures in a bottom wall heated cylinder enclosure. The numerical results are analyzed in detail to show the damping of the temperature fluctuation amplitude from the cold up wall to the hot down wall, which is characterized by the ratio of the fluctuation amplitude of down wall and up wall. Fluid...
Prof.
Qing Li
(Technical Institute of Physics and Chemistry,University of the Chinese Academy of Sciences)
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
A partial emission cryogenic liquid hydrogen pump of radial-straight-blade was developed to meet an application requirement of small flow rate and high pump head. The exterior performance and flow characteristics of a partial emission cryogenic liquid hydrogen pump were simulated and studied in this paper. The external characteristic was predicted by using of sliding mesh method. The...
Mr
Karthik Sunil
(School of mechanical engineering)
ICMC-14 - Cryogenic Materials Testing and Methods
Poster Presentation
Composite materials are being used extensively in different realms of science and technology for various applications. Testing of these composite materials is of substantial importance, as the composite materials might be susceptible to failure due to the variation in the operating temperature ranges and the cryogenic temperatures at which the material have to endure.
In the present work,...
Dr
gang zhou
(Technical Institute of Physics and Chemistry, CAS)
CEC-15 - Instrumentation and Controls
Poster Presentation
Numerical investigation was performed on the temperature control of NIF cryogenic target in order to get a temperature uniformity of 0.1mK on the surface of the target capsule. Heat transfer process was discussed to find out major factors in the temperature control, tamping gas heat transfer and natural convection of the tamping gas was calculated. Spherically symmetric temperature field is...
Dr
Guram Bokuchava
(Sokhumi Ilia Vekua Institute of Physics and Technology), Ms
Natia Jalagonia
(Sokhumi Ilia Vekua Institute of Physics and Technology), Dr
Roin Chedia
(Sokhumi Ilia Vekua Institute of Physics and Technology), Mrs
Tinatin Kuchukhidze
(Sokhumi Ilia Vekua Institue of Physics and Technology)
ICMC-04 - MgB2 Processing and Properties
Contributed Oral Presentation
Magnesium diboride bulk superconductor samples (targets) with a diameter >50 mm has been obtained in an induction furnace, using hot press and spark-plasma synthesis methods. Those methods enable to obtain small diameter (up to <25 mm) samples without any difficulties by gradual temperature increase 20-10500C during 5-12 minutes. Increased diameter (>50 mm) of the samples reveal a number of...
Dr
gang zhou
(Technical Institute of Physics and Chemistry, CAS)
CEC-03 - Cryocoolers (Non-Aerospace)
Poster Presentation
Based on the linear thermoacoustic theory, the influence of geometric parameters of regenerator and phase mechanical (PM) tube on thermoacoustic refrigerator’s cooling capacity is studied in this paper. Theoretical analysis results show that there exists an optimal phase and impedance values to make the cooling capacity maximum. On this basis, the experimental study of the relationship between...
Dr
Biju.T Kuzhiveli
(Centre for Advanced Studies in Cryogenics (CASC), Department of Mechanical Engineering, National Institute of Technology, Calicut), Mr
Kishor Kumar V V
(Department of Mechanical Engineering, Government College of Engineering, Kannur)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
Stirling cryocoolers find applications in various military, commercial and scientific projects which require cooling of infrared (IR) sensors, imaging cameras and optical elements. They are used to produce cryogenic cooling in the range of 60-80 K with the cooling power ranging from mW to a few watts. The performance of the cooler largely depends on the effectiveness of the regenerative heat...
Mr
Zhenjun Zhou
(Key Laboratory of Space Energy Conversion Technologies, Technical Institute of Physics and Chemistry)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
A compact 4He Joule-Thomson(JT) cryocooler using two-stage Gifford-McMahon(GM) cooler as pre-cooling stages has been successfully designed and developed. The GM refrigerator cools the incoming helium gas to 91K at the first stage and 14K at the second stage. The JT system consists of three tube-in-tube heat exchangers(HEX), two spiral heat exchangers and a JT orifice. Experiments discussed in...
Liqiang Liu
(Technical Institute of Physics and Chemistry of CAS-Academia Si)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
Helium liquefier is widely used in the fields of superconducting, nuclear fusion energy and high-energy physics. However, the present PID controlling system of the liquefier is not well able to keep the compressor suction pressure, outlet pressure and turbine inlet pressure all in the expected range. Thus, a multi-strategy controller for a helium liquefier is proposed in this paper. A dynamic...
Prof.
HASSAN EL IDRISSI
(UNIVERSITE HASSAN II CASABLANCA MAROC)
ICMC-05 - Thin Films
Poster Presentation
The study of the existence of a possible percolation transition in a dilute two dimensional hole gas in GaAs/AlGaAs within a parallel magnetic field, was the aim of our investigation in this work at a fixed low temperature T= 260 mK. Following the evolution of the electrical conductivity as a function of magnetic field at high carrier densities, we have showed the creation of a densitity...
Mr
Qiang Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
Cryogenic transfer line is the key component of the large-scale helium cryo-refrigerator or cryostat. Heat leakage of modern cryogenic transfer line is quite low, so it is difficult to determine the heat leakage rate of the transfer line. For this reason, we design and built a test platform of thermal insulation performance of cryogenic transfer line. The test platform consists of several...
Annett D'Antonio
(Centennial Conferences)
Huajun Liu
(Chinese Academy of Sciences)
CEC-06 - Superconducting Magnet Systems
Poster Presentation
In order to reduce the heat load to liquid helium, totally 13 pairs of HTS current leads were used in EAST facility. This paper is focused on testing of the current leads. A test facility was set up and used to test the HTS current leads. A 500W/4.5K refrigerator was used to cool down the test system. The top side of the HTS current leads was cooled by LN2 and bottom side cooled by 4.5K...
Mr
Bao FU
(Institute of Plasma Physics, China Academy of Sciences)
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
The cryogenic system is one of the most important subsystems of EAST (Experimental Advanced Super-conducting Tokamak). Helium turbines is the core parts of cryogenic system. One of the four helium turbines is chose to be designed ,manufactured and tested. Some analysis of the helium turbine structure，testing process and the testing results are given. The starting up process and the operational...
Dr
Kaixuan Gu
(Key Laboratory of Cryogenics, TIPC, Chinese Academy of Sciences, Beijing 100190, China)
ICMC-11 - Metallic and Composite Materials
Poster Presentation
The 9Ni steel is widely used in cryogenic temperature due to its superior cryogenic properties. In the present paper, the tensile and impact properties of 9Ni steel at 20℃, -40℃, -70℃, -110℃, -140℃ and -196℃ were tested by the MTS-SANS CMT500 universal tensile testing machine. The result showed that the strength increased with the fall of temperature while the impact toughness decreased with...
Dr
Taihe Huang
(Technical Institute of Physics and Chemistry, Chinese academy of science)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
In order to have a more compact structure for the applications, for general design of the co-axial pulse tube cryocoolers (CPTCs), the pulse tube and regenerator share a thin stainless steel wall. In former theoretical analysis, this wall is considered to be adiabatic and few research pays attention to the thermal-coupling effect between the pulse tube and regenerator in CPTCs. In this...
Prof.
shaopeng Li
(IHEP),
zhuo zhang
(IHEP)
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
ADS-InjectorⅠis one of the important parts in the Accelerator Driven Sub-critical project. In order to reduce the quantity of impurities in the helium and to recover the helium during superconducting cavities tests or maintenance, a helium purification and recovery system is implemented in the ADS-Injector I cryogenic plant.
It is composed by two high pressure recovery compressors, a helium...
Dr
gang zhou
(echnical Institute of Physics and Chemistry, CAS)
CEC-15 - Instrumentation and Controls
Poster Presentation
The choice of the appropriate installation method plays an important role for accurate temperature measurement. In the cryogenic and high vacuum environment, due to poor contact between the cryogenic temperature sensor and the surroundings that the sensor is installed and intended to measure, the self-heating from sensor measuring current brings about temperature difference and creates a...
Gunn-Tae Park
(Institute for Basic Science)
CEC-07 - Superconducting RF Systems
Poster Presentation
At Rare Isotope Science Project (RISP) in Korea, the accelerator system based on the superconducting cavities has been developed. The superconducting cavities made of bulk high purity niobium has a superconducting transition temperature around 9K and it needs to be coold by liquid helium system. Since the operating RF bandwidth is very narrow around 80 Hz and sensitive to the deformation of...
Dr
Miao Wang
(Shaanxi Normal University)
CEC-06 - Superconducting Magnet Systems
Poster Presentation
The top-seeded infiltration and growth process (TSIG) is very effective method for the preparation of REBCO bulk superconductors. In this paper, we investigate the effect of preparing GdBCO bulk superconductors by the modified TSIG process using spatially graded solid phase source precursor powder. The single domain GdBCO bulk were prepared with the graded solid phase which was pressed with a...
Ms
Wei Pan
(01082543662)
CEC-01 - Large-Scale Refrigeration and Liquefaction
Poster Presentation
In the development of a helium refrigerator, the control of load temperature stability is an important requirement. We usually use multistage control strategies to achieve the precise control of it. Each level has its strict control logic. PID controller is the core control module in the process. Therefore, a research of its principle and parameter settings occupies an important position in...
Taihe Huang
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
CEC-04 - Cryocoolers (Aerospace)
Poster Presentation
For U-type pulse tube cryocoolers (UPTCs), the design of the cold end is the key questions for the performance optimization. Some former experimental researches showed us several kinds of design of the cold end of UPTCs. The object of this paper is to compare the different design of cold end of UPTCs to explain the performance differences between them through the CFD simulations. Through CFD...
Mr
Peng Xu
(The Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences)
CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties
Poster Presentation
As we know, the performance of the inner purifier plays an important role in the operation of the helium liquefier. In inner purifier, contaminated helium gas goes into the first stage heat exchanger (1st HEX) and is cooled down to nearly 65K, parts of impurity turn to liquid, which are subsequently removed when passing through liquid separate pot. Thus the heat and mass transfer performance...
Mr
Lei Hu
(Institute of electrical engineering chinese academy of science), Mr
Naihao Song
(Institute of electrical engineering chinese academy of science)
CEC-02 - Large-Scale Systems, Facilities, and Testing
Poster Presentation
Composite flywheel is a novel energy storage device which can realize energy conversion between mechanical energy and electric energy. It has many advantages including high energy storage, high power, no pollution, high
storage efficiency, noise free , wide application , long cycle life, and so on. The subject studied in this paper is a 0.5MJ/10000r/min superconducting composite flywheel...
Dr
Lianyou Xiong
(TIPC)
CEC-05 - Expanders, Pumps, Compressors, and Regenerators
Poster Presentation
In this paper, an optimization design for whole performance of a high-speed radial-axial flow cryogenic turbo-expander is discussed. The main structural parameters of the expander blade are obtained through a design method based on one-dimension steady flow. The non –developable ruled parabolic shaping method is used to design the leaf type. Then numerical simulation and detailed analysis are...
Prof.
Abdelhamid El kaaouachi
(University Ibn Zorh Faculty of sciences, Agadir, Morocco)
ICMC-05 - Thin Films
Poster Presentation
We studied the metal-insulator transition (MIT) induced by the magnetic field, in barely metallic and compensated p-type. 70Ge:Ga using the scaling laws, at low temperature in range (0.65 -0048 K) and in magnetic field up to 5.3 T. We have determined the magnetic field for which the conductivity changes from the metallic behaviour to the insulator regime. On the metal side of the MIT, the...
Prof.
Junjie Wang
(Key Laboratory of Cryogenics, TIPC, Chinese Academy of Sciences)
CEC-09 - Cryogenics for Power Applications, Energy, Fuels and Transportation
Poster Presentation
As a promising large scale energy storage system, the liquid air energy storage (LAES) has advantages like high energy density and no geographical limitation. This paper describes the liquefaction process for LAES and conducts the theoretical analysis of thermodynamic characteristics to investigate the performance of LAES system. Comparative analysis of the liquefaction process is studied...
Dr
WooKang Kim
(IBS)
CEC-16 - Cryogenics for Medical, Food, Environmental, and Manufacturing
Poster Presentation
The heavy ion accelerator that will be built in Daejeon, Korea utilizes superconducting cavities operating in 2 K, 4.5K. The cryomodules are QWR (quarter wave resonator), HWR (half wave resonator), SSR1 (sing spoke resonator 1) and SSR2 (sing spoke resonator 2). The main role of the cryomodule is supplying thermal insulation for cryogenic operation of the cavities alignment. Thermal and...
Dr
Leszek Motowidlo
(SupraMagnetics, Inc.)
ICMC-01 - NbTi/Nb3Sn/A15 Processing and Properties
Poster Presentation
Powder-in-Tube (PIT) Nb3Sn conductors have be fabricated. In this paper, we determine the effect of the nanoscale alumina on strengthening the tin through milling as a function of time to better match the mechanical properties of the Matrix NbTa. A closer match of the tin cores to the NbTa matrix is expected to help in uniform processing to achieve concentric tin cores. Characterization of...
