Conveners
Tue-Af-Posters Session 1.4: Instrumentation and Process Controls
- Christine Darve (European Spallation Source)
Mr
Luis Gomez Palacin
(CERN)
08/07/2014, 14:15
Poster presentation (105min)
This work deals with the optimal management of a cryogenic plant composed by refrigeration plants in parallel, which provide supercritical helium to pulsed heat loads. First, different strategies to estimate the efficiency of each refrigerator are analyzed. Then, taking into account these efficiencies, an optimal operation of the cryoplant is proposed and studied. It ensures a long and stable...
Prof.
Isabel Catarino
(CEFITEC, Departamento de Física, FCT - Universidade Nova de Lisboa, 2829-516 Caparica, Portugal)
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
A gas gap heat switch (GGHS) reaches its highest conductance state when the gap between two exchange surfaces is filled with a conducting gas in a viscous regime. The broader the surface and the thinner the gap, the higher the ON conductance achieved. In this presentation we describe a very thin cold gas gap heat switch based upon the use of the differential thermal expansion of the...
Prof.
Karunanithi Rangasamy
(Indian Institute of Science)
08/07/2014, 14:15
Poster presentation (105min)
The cryogen level measurement for space missions is very crucial. At the same time, the weight of the sensor should be less because the payload fraction would be reduced; resulting in increase in the mission cost. An attempt was made to develop HTS based level sensor of 400 mm for LOX measurement. In the initial phase of testing, the sensor goes to normal state due to increase in temperature...
Ruud Van der Woude
(Demaco Holland bv)
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
Demaco was awarded with the contract for the design, manufacturing and installation of the Accelerator Module Test Facility (AMTF) for XFEL at DESY, Hamburg.
The scope consisted of a Sub-cooler Box XASB, a Valve Box XAVB and all interconnecting multiple Helium Transfer Lines. The instrumentation was part of the responsibility and based on the specifications of DESY.
For Temperature...
Prof.
Zhengyu Li
(Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS)
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
Self-heating of resistance thermometers is a well-known phenomenon, which occurs when the measuring current additionally heats up the sensing element.The temperature difference caused by the self-heating can be corrected by basic two-current method. However, in measurements of the highest accuracy, uncertainty of the self-heating correction, achieved by basic two-current method, may not be...
Yury Filippov
(J)
08/07/2014, 14:15
Poster presentation (105min)
This report presents long-term experience in cryodiagnostics of superconducting accelerators cooled with two-phase helium flows. It concerns: resistive temperature (T) sensors for wide applications including the magnetic field and irradiation environments, their calibration system and features to mount these sensors; RF-void fraction (VF) sensors and set-up to calibrate them; a discrete...
Dr
Marcos Turqueti
(L)
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
LBNL has developed an innovative data acquisition module for superconductive magnets where the front-end electronics and digitizer resides inside the cryostat. Currently, in most cases, the digitization of signals internal to the cryostat containing the superconducting magnet is done outside the cryostat. This kind of setup can degrade the performance of the data acquisition in several ways,...
Dr
Tao Yan
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
08/07/2014, 14:15
Poster presentation (105min)
Abstract. A 40L/h Helium Liquefier is established at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. A measurement and control system based on Siemens PLC S7-300 for this Helium Liquefier is developed. Proper sensors are selected, for example, three types of transmitters are adopted respectively according to detailed temperature measurement requirements. Siemens...
Mr
Thomas Richter
(Karlsruhe Institute of Technology ( campus North))
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
The use of High Temperature Superconducting (HTS) magnets has increased in recent years in many applications due to its chances of achieving high current carrying capacity and the possibility of avoiding the HTS cooling by costly, less available liquid helium. While most of the applications aimed at liquid nitrogen coolant, some special applications like HTS Generator, for example, use liquid...
Mr
Kazuma Maekawa
(Kobe University)
08/07/2014, 14:15
Poster presentation (105min)
Hydrogen energy is attracting attention as an alternative energy source to fossil fuels and nuclear power. In the storage and transport of a huge quantity of hydrogen on the sea, liquid hydrogen (LH2) is very effective because its density is about 788 times that of gaseous hydrogen ( 273 K, 1 atm). We are currently developing an external-heating-type superconducting magnesium diboride (MgB2)...
Christine Hoa
(CEA SBT)
08/07/2014, 14:15
Poster presentation (105min)
Superconducting magnets are subjected to large variations of heat loads due to the cycling operation of tokamaks. The cryogenic system shall operate smoothly to extract the pulsed heat load by circulating supercritical helium into the coils and structures. However the value of the total heat loads and its temporal variation are not known before the plasma scenario starts. A real-time heat...
Mr
Czeslaw Fluder
(CERN)
08/07/2014, 14:15
Poster presentation (105min)
The control system of the cryogenic in the LHC tunnel is based on an automatic approach for the control software production process due to its overall complexity. Consequently, an extensive use of various IT technologies - databases, repositories, commercial engineering software, CERN frameworks and dedicated tools are required. The software development is partially automatized, however, every...
Prof.
Hiroshi Ikeda
(University of Tsukuba)
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
The operating conditions of internal purifiers of commercial helium liquefiers are determined by the adjustment of the cold end temperature, the cold flow, the regeneration completion temperature and the heater temperature.
By changing the cold end temperature of the purifier from 32.5 K to 22 K, the purity of the recovered gas is improved from 33% to 99%, The current regulation values for...
Dr
Christine Darve
(European Spallation Source)
08/07/2014, 14:15
Poster presentation (105min)
The European Spallation Source (ESS) is one of Europe's largest research infrastructures, to bring new insights to the grand challenges of science and innovation in fields as diverse as material and life sciences, energy, environmental technology, cultural heritage, solid-state and fundamental physics by the end of the decade. The collaborative project is funded by a collaboration of 17...
Mr
Andreas Janzen
(Karlsruher Institut of Technology - Institute of Technical Thermodynamics and Refrigeration (ITTK))
08/07/2014, 14:15
C-16: Instrumentation and process control
Poster presentation (105min)
A new thermal method for flow measurement in cryogenic systems was recently published, featuring the capability for intrinsic calibration. The new method minimizes the differences between two physically exact evaluation functions for the flow rate, which are based on the same input parameters, i.e. the measurement readings of temperature differences and heater power of a heat exchanger. The...
