CHATS on Applied Superconductivity 2019

9 Jul 2019, 08:00 → 12 Jul 2019, 18:00 Europe/Zurich

Faculty of Mechanical Engineering and Mechatronics of the West Pomeranian University of Technology, Szczecin

Monika Lewandowska (West Pomeranian University of Technology, Szczecin), Dariusz Bocian (Institute of Nuclear Physics Polish Academy of Sciences (Kraków, PL))

                                                  

CHATS AS 2019 will be held 9-12 July 2019, hosted by the Faculty of Mechanical Engineering and Mechatronics of the West Pomeranian University of Technology, Szczecin (WPUT) in collaboration with the The Henryk Niewodniczanski Institute of Nuclear Physics (IFJ), Polish Academy of Sciences, Krakow.

Objectives and Topics

CHATS-AS 2019 will be the 13th  in a series of international workshops that have followed the advancements in the state-of-the-art of modeling of superconducting systems, from cables to magnets and other devices used for power generation and transmission, fusion, high-energy physics as well as other applications. CHATS-AS is focused on novel principles and tools in engineering design and analysis of superconducting systems. The Workshop also aims at building bridges between modeling and experiments, in order to validate the sophisticated analysis tools available with proper data sets. The CHATS-AS 2019 welcomes contributions fitting this scope, with a particular interest in the following topics:

   -  Quench simulation and analysis for all classes of LTS and HTS magnets (e.g. accelerator, fusion, MRI/NMR, and other applications) and devices (e.g. power cables).

   -  Quench detection and protection of HTS magnets: novel concepts, models and experiments.

   -  Electro-mechanical modeling of Nb3Sn and HTS magnets.

   -  Multi-scale modeling of cables and magnets made of LTS and HTS materials, and their relation to the strand or short-sample performance.

   -  Simulation and optimization of large-scale superconducting and cryogenic systems, covering the combination of thermo-hydraulics, AC loss, current distribution, field quality, and operating margin calculations.

   -  Modeling in support of the design and development of cryocoolers, and conduction-cooled superconducting devices.

CHATS-AS 2019 First circular.pdf

Tuesday, 9 July

08:30 → 09:20 REGISTRATION

09:20 → 09:30 Opening welcome

Conveners: Krzysztof Danilecki, Monika Lewandowska (West Pomeranian University of Technology, Szczecin)

09:30 → 10:30 Session I: Experimental results in support of superconducting system modeling

Convener: Arend Nijhuis (University of Twente)

09:30 Heat transport in tilted stacks of HTS tapes at temperatures above 20K

Speaker: Łukasz Tomków (University of Cambridge)

P1.2019.07.09.lukasz tomkow.pdf

10:00 Hydraulic characterization of conductor prototypes for fusion magnets

Speaker: Monika Lewandowska (West Pomeranian University of Technology, Szczecin)

ML_CHATS-AS-2019_hydraulic.pdf

10:30 → 10:50 Coffee break

10:50 → 11:50 Session I: Experimental results in support of superconducting system modeling

Convener: Arend Nijhuis (University of Twente)

10:50 Strand-Jacket Thermal Contact Resistance of REBCO Conductor Measured on Dummy Conductors

Speaker: Rui Kang

Strand-jacket contact thermal resistance measurment 1.pdf

Strand-jacket contact thermal resistance measurment 1.pptx

11:20 Steady-state transverse heat transfer in a single channel CICC

Speaker: Aleksandra Dembkowska (West Pomeranian University of Technology, Szczecin)

P4.2019.07.09.CHATS_2019_h_exp AD v2.pdf

11:50 → 12:50 Session II: Electro-mechanical modeling

Convener: Alfredo Portone (Fusion For Energy/European Commission)

11:50 On the Mechanical Behavior of a Nb3Sn Superconducting Coil During a Quench: Three-Dimensional Finite Element Analysis of a Quench Heater Protected Quench

Speaker: Jose Ferradas Troitino (Universite de Geneve (CH))

JFT_CHATS_Quench_2019_vF.pdf

JFT_CHATS_Quench_2019_vF.pptx

12:20 LTS magnets electro-mechanical modelling taking into account magnetic iron forces

Speaker: Douglas Martins Araujo (CERN)

P6.2019.07.09.CHATS_2019_MARTINS_ARAUJO.pdf

12:50 → 14:10 Lunch break

14:10 → 14:40 Session II: Electro-mechanical modeling

Convener: Alfredo Portone (Fusion For Energy/European Commission)

14:10 Electro-Mechanical FE modeling of CORC® cable configurations based on bending experiments.

Speaker: Arend Nijhuis (University of Twente)

P7.2019.07.09.Strain in CORC_CHATS19_ANijhuis_Final.pdf

14:40 → 15:40 Session III: Electromagnetics

Convener: Sylvie NICOLLET (CEA)

14:40 A-formulation method for full 3D FEM computation of the superconducting magnetization.

Speaker: Mykola Soloviov (Institute of Electrical Engineering Slovak Academy of Sciences )

P8.2019.07.09.CHATS19_Soloviov.pdf

15:10 Field Quality Analysis in the HTS Dipole Insert-Magnet Feather M2 with the Finite Element Method.

Speaker: Lorenzo Bortot (CERN)

2018_07_09_CHATS_BORTOT_V2.pdf

2018_07_09_CHATS_BORTOT_V2.pptx

15:40 → 16:00 Coffee break

18:00 → 20:30 Guided city walk

Wednesday, 10 July

09:00 → 10:30 Session IV: Thermo-hydraulic and cryogenics

Convener: Bertrand Baudouy (CEA Paris-Saclay)

09:00 Adaptation of the nuclear safety code CATHARE3 to supercritical helium flow.

Speaker: Sulayman Shoala (CEA/DRF)

CATHARE3_CHATS.pdf

09:30 Simulation of a cryogenic capillary tube: thermodynamic behavior subjected to heat load.

Speaker: Maria Barba (CEA (Commissariat à l'Énergie Atomique))

V2Poland2019.pdf

10:00 An update of dynamic thermal-hydraulic simulations of the JT-60SA Cryogenic system for preparing plasma operation

Speaker: François BONNE (CEA)

chats_190708.pdf

chats_190708.pptx

10:30 → 10:50 Coffee break

10:50 → 11:20 Session IV: Thermo-hydraulic and cryogenics

Convener: Bertrand Baudouy (CEA Paris-Saclay)

10:50 Parametric study and optimization of the cryo-magnetic system for EU DEMO at the pre-conceptual design phase

Speaker: Christine Hoa (CEA,IRIG)

CHATS_Parametric_Optimization_cryogenic_studies.pptx

11:20 → 12:50 Session V: Electro-thermal modeling

Conveners: Monika Lewandowska (West Pomeranian University of Technology, Szczecin), Dariusz Bocian (Institute of Nuclear Physics Polish Academy of Sciences (Kraków, PL))

11:20 Thermal analysis of AC loss heated Nb3Sn coil samples for the High Luminosity upgrade of the LHC.

Speaker: Kirtana Puthran (CERN)

AnalysisExpNumChats2019_KiPuthran.pdf

11:50 Electro-thermal 1D model of the SIS100 superconducting dipole magnet.

Speaker: Piotr Szwangruber (GSI Helmholtzzentrum für Schwerionenforschung GmbH)

Electro-Thermal_1D_Model_of_the_SIS100_Superconducting_Dipole_Magnet_PSz_CHATS_AS_2019.pdf

12:20 PSpice modeling of the inrush and fault currents in a 21 MVA HTS transformer.

Speaker: Pawel Surdacki (Lublin University of Technology)

Surdacki-pres-CHATS-AS-2019.pdf

12:50 → 14:10 Lunch break

14:10 → 15:10 Session V: Electro-thermal modeling

Conveners: Monika Lewandowska (West Pomeranian University of Technology, Szczecin), Dariusz Bocian (Institute of Nuclear Physics Polish Academy of Sciences (Kraków, PL))

14:10 1D and 2D finite-element approaches to extract the resistivity of the superconductor material from pulsed current measurements on HTS commercial tapes.

Speaker: Nicolo' Riva (EPFL - EPF Lausanne)

Chats_Riva2019_Upload.pdf

14:40 Analysis of Current Distirbution during Quench in a Pancake coil wound with REBCO Roebel cable.

Speaker: Marco Breschi (University of Bologna)

CHATS_2019_final_Breschi.pdf

15:10 → 15:40 Session VI: Multiphysics modeling of superconducting devices

Convener: Sylvie NICOLLET (CEA)

15:10 User Defined Elements in ANSYS for Multiphysics Modeling of Superconducting Magnets.

Speaker: Lucas Brouwer (Lawrence Berkeley National Laboratory)

2019_07_10_CHATS_AS_vfinal.pdf

2019_07_10_CHATS_AS_vfinal.pptx

15:40 → 16:00 Coffee break

16:00 → 17:00 Session VI: Multiphysics modeling of superconducting devices

Convener: Sylvie NICOLLET (CEA)

16:00 OLYMPE, a multi-physic platform for fusion magnet design.

Speaker: Quentin Le Coz (CEA)

CHATS2019_ZANI_final.pptx

16:30 Empowering the 4C code for the thermal-hydraulic analysis of coils for the design of future SC tokamaks: a novel, fully-3D model of the TF coil structures.

Speaker: Roberto Bonifetto (Politecnico di Torino)

Bonifetto_4C_structures3Dmodel_CHATS2019.pdf

19:00 → 22:00 Social dinner

Thursday, 11 July

08:55 → 10:00 Session VI: Multiphysics modeling of superconducting devices

Convener: Sylvie NICOLLET (CEA)

08:55 Fundamental description of Field Induced Josephson junctions and devices built on their base.

Speaker: Krzysztof Pomorski (University College Dublin)

presentation_JJ_vs_semiqQQ3_Pomorski.pdf

09:25 FEM Modeling Of Multilayer Canted Cosine Theta (CCT) Magnets.

Speaker: Rafal Ortwein / Przemyslaw Wachal

CHATS_RO_PW_GK_JvN_CCT.pdf

10:00 → 10:30 Session VII: Quench in HTS conductors

Convener: Marco Breschi (University of Bologna)

10:00 Analysis of quench in HTS conductors for fusion applications: a novel 1D thermal-hydraulic modeling approach.

Speaker: Andrea Zappatore (Politecnico di Torino)

Zappatore_Andrea_polito_chats2019.pdf

10:30 → 10:50 Coffee break

10:50 → 12:20 Session VII: Quench in HTS conductors

Convener: Reinhard Heller (Karlsruhe Institute of Technology)

10:50 Study on conditions for successful quench protections of coils wound with coated conductors by short-sample experiments and quench simulations.

Speaker: Naoyuki Amemiya (Kyoto University)

CHATS-AS_2019-Amemiya-DC.pdf

11:20 Modelling of a 50 kA REBCO Conductor with Multi-strand Made by Twisted Stacked Tapes.

Speaker: Rui Kang

Modelling quench of a 50 kA REBCO conductor with twisted-soldered-stacked strands.pdf

Modelling quench of a 50 kA REBCO conductor with twisted-soldered-stacked strands.pptx

11:50 Design and analysis of HTS subsize-conductors for quench investigations towards future HTS fusion magnets.

Speaker: Michael Wolf (Karlsruhe Institute of Technology (KIT))

12:20 → 12:50 Session VIII: Quench and thermo-hydraulic LTS

12:20 Quench Thermohydraulic Analysis of Tore Supra/WEST TF Coil and Smooth Quench Occurrence in Tokamak.

Speaker: Sylvie NICOLLET (CEA)

2019-07-01_CHATS_S-Nicollet_TS-WEST-Quench_vSN3.pptx

12:50 → 14:10 Lunch break

14:10 → 15:40 Session VIII: Quench and thermo-hydraulic LTS

Convener: Naoyuki Amemiya (Kyoto University)

14:10 Numerical Investigation of Quench Event in the Innermost Pair of the KSTAR Central Solenoids.

Speaker: Dong Keun Oh

SessionVIII2_DKO.pdf

14:40 Quench Protection Design of the HL-LHC Hollow Electron Lens System.

Speaker: Michal Maciejewski (Technical University of Lodz(PL))

190711_HEL_Quench_Protection_Studies.pdf

190711_HEL_Quench_Protection_Studies.pptx

15:10 Towards to Quench Limit Determination of Superconducting Magnet with use of Thermal-Electrical Analogy

The superconducting magnets are an essential part of large particle accelerators. The superconductors used in winding the coils of these magnets are characterized by the critical surface determined by three parameters: the critical temperature (Tc), the critical current density (Jc) and the critical magnetic field (Bc). The energy deposited in the superconductors by the particles lost from the beam or coming from the experiment collision debris may heat up the conductor in the magnet coil and provoke the magnet to quench. The modern design of the superconducting accelerator magnets requires the thermal optimization at cryogenic conditions in terms of heat transfer from magnet coils to heat reservoir. The main challenge of the accelerators operating with the superconducting magnets is their protection against the energy deposits to the coils from the particles lost from the beam and determination of the energy limits at which beam should be dump from the accelerators in order to avoid the magnets quench.
The thermo-electrical analogy was used to develop a model of the superconducting magnets which has been used to study the thermal behavior of magnet and to determine the limits of quench of the magnets for expected beam loss profiles. The developed Network Model was used for thermal analysis of LHC Nb-Ti magnets and for optimization of Nb3Sn quadrupole magnets developed for use in the LHC luminosity upgrade. The analysis focuses on the heat transfer from the superconductor to the heat exchanger through a multilayer structure of magnet made of solid elements and channels occupied by the normal fluid or the superfluid helium. The results of the simulation by means of the Network Model were validated with measurements. A different sources of heat were implemented (magnet quench heaters, Inner Heating Apparatus) in different configurations. All simulations showed a very good agreemnt with measurements and with expected accuracy. The sources of discrepancy between the results of the simulations and measurements were related to the thermal properties of materials used in simulatiions. The developed model was successfully implemented to study of the thermal behavior of the newly developed enhanced insulation and newly designed Nb3Sn magnets. The future development of the model is foreseen by the design of a dedicated module which will introduce the energy deposits compatibile with the LHC beam pattern as well as module to study the transient mode.

Speaker: Dariusz Bocian (Institute of Nuclear Physics Polish Academy of Sciences (Kraków, PL))

CHATS-AS_QL_MAGNETS.pdf

15:40 → 16:00 Coffee break

16:00 → 17:00 Wrap-up session

16:00 Workshop wrap-up

CHATS_Session1_Discussion_Summary_AN.pptx

CHATS_Session2_on_Tuesday.pdf

CHATS_Session3&6-Wrap-Up.pptx

CHATS_Session4_Discussion.pdf

CHATS_Session5-Wrap-Up.pptx

CHATS_Session7_Discussion_Breschi.pdf

Friday, 12 July

07:45 → 16:00 Wendelstein 7-X tour