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Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable
Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 WP10 Future Magnets collaboration is aiming at testing HTS-based Roebel cables in an accelerator magnet. The demonstrator should produce around 17 T, when inserted into the 100 mm aperture of Feathe...
Autores principales: | , , , , , , |
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Formato: | info:eu-repo/semantics/article |
Lenguaje: | eng |
Publicado: |
IEEE Trans. Appl. Supercond.
2017
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1109/TASC.2017.2665882 http://cds.cern.ch/record/2271144 |
_version_ | 1780954877501898752 |
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author | Murtomaki, Jaakko S Murtomaeki, Jaako van Nugteren, Jeroen Kirby, Glyn Rossi, Lucio Ruuskanen, Janne Stenvall, Antti |
author_facet | Murtomaki, Jaakko S Murtomaeki, Jaako van Nugteren, Jeroen Kirby, Glyn Rossi, Lucio Ruuskanen, Janne Stenvall, Antti |
author_sort | Murtomaki, Jaakko S |
collection | CERN |
description | Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 WP10 Future Magnets collaboration is aiming at testing HTS-based Roebel cables in an accelerator magnet. The demonstrator should produce around 17 T, when inserted into the 100 mm aperture of Feather-M2 13 T outsert magnet. HTS Roebel cables are assembled from meander shaped REBCO coated conductor tapes. In comparison with fair level of uniformity of current distribution in cables made out of round Nb-Ti or Nb$_{3}$Sn strands, current distribution within the coils wound from Roebel cables is highly non-homogeneous. It results in nonuniform electromagnetic force distribution over the cable that could damage the very thin REBCO superconducting layer. This paper focuses on the numerical models to describe the effect of the non-homogenous current distribution on stress distribution in the demonstrator magnet designed for the EuCARD-2 project. Preliminary results indicate that the impregnation bonding betweenthecableglassfiberinsulationandlayer-to-layerinsulation plays a significant role in the pressure distribution at the cable edges. The stress levels are safe for Roebel cables. Assuming fully bonded connection at the interface, the stresses around the edges are reduced by a large factor. |
format | info:eu-repo/semantics/article |
id | cern-2271144 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2017 |
publisher | IEEE Trans. Appl. Supercond. |
record_format | invenio |
spelling | cern-22711442019-09-30T06:29:59Z doi:10.1109/TASC.2017.2665882 http://cds.cern.ch/record/2271144 eng Murtomaki, Jaakko S Murtomaeki, Jaako van Nugteren, Jeroen Kirby, Glyn Rossi, Lucio Ruuskanen, Janne Stenvall, Antti Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable Accelerators and Storage Rings 10: Future Magnets (MAG) 10.1: Coordination and Communication Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 WP10 Future Magnets collaboration is aiming at testing HTS-based Roebel cables in an accelerator magnet. The demonstrator should produce around 17 T, when inserted into the 100 mm aperture of Feather-M2 13 T outsert magnet. HTS Roebel cables are assembled from meander shaped REBCO coated conductor tapes. In comparison with fair level of uniformity of current distribution in cables made out of round Nb-Ti or Nb$_{3}$Sn strands, current distribution within the coils wound from Roebel cables is highly non-homogeneous. It results in nonuniform electromagnetic force distribution over the cable that could damage the very thin REBCO superconducting layer. This paper focuses on the numerical models to describe the effect of the non-homogenous current distribution on stress distribution in the demonstrator magnet designed for the EuCARD-2 project. Preliminary results indicate that the impregnation bonding betweenthecableglassfiberinsulationandlayer-to-layerinsulation plays a significant role in the pressure distribution at the cable edges. The stress levels are safe for Roebel cables. Assuming fully bonded connection at the interface, the stresses around the edges are reduced by a large factor. info:eu-repo/grantAgreement/EC/FP7/312453 info:eu-repo/semantics/openAccess Education Level info:eu-repo/semantics/article http://cds.cern.ch/record/2271144 IEEE Trans. Appl. Supercond. IEEE Trans. Appl. Supercond., 4 (2017) pp. 4100405 2017 |
spellingShingle | Accelerators and Storage Rings 10: Future Magnets (MAG) 10.1: Coordination and Communication Murtomaki, Jaakko S Murtomaeki, Jaako van Nugteren, Jeroen Kirby, Glyn Rossi, Lucio Ruuskanen, Janne Stenvall, Antti Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable |
title | Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable |
title_full | Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable |
title_fullStr | Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable |
title_full_unstemmed | Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable |
title_short | Mechanical Effects of the Non-Uniform Current Distribution on HTS Coils for Accelerators Wound with REBCO Roebel Cable |
title_sort | mechanical effects of the non-uniform current distribution on hts coils for accelerators wound with rebco roebel cable |
topic | Accelerators and Storage Rings 10: Future Magnets (MAG) 10.1: Coordination and Communication |
url | https://dx.doi.org/10.1109/TASC.2017.2665882 http://cds.cern.ch/record/2271144 http://cds.cern.ch/record/2271144 |
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