Article (Scientific journals)
AC Loss Computation in Large-Scale Low-Temperature Superconducting Magnets: Multi-Scale and Semi-Analytical Procedures
Denis, Louis; Nuttens, Vincent; Vanderheyden, Benoît et al.
2025In IEEE Transactions on Applied Superconductivity, 35 (2), p. 1-19
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Keywords :
AC losses; finite-elements; low-temperature superconductors; magneto-thermal analysis; multi-scale
Abstract :
[en] In this article, we introduce two complementary approaches for the prediction of ac losses in large-scale low- temperature superconducting (LTS) magnets subjected to slow ramp rates. These methods account for the temperature rise within the LTS coil and its impact on ac losses. The first approach is multiscale and relies on the coupling between a macroscopic ho- mogenized model of the LTS coil and a mesoscopic model of a single filament for loss prediction. The second approach is semianalytical and is based on analytical approximations for the hysteresis losses, which are validated against the single filament model. The second approach offers a faster computation suitable for initial design considerations, while the multiscale method is shown to take into account more complex phenomena for the ac loss evaluation at the filament scale. We apply both methods to the prediction of ac losses generated in the LTS coil inside the IBA S2C2 synchrocyclotron during its ramp-up procedure. Additionally, we discuss the conver- gence properties of the multiscale approach and demonstrate the good agreement between the numerical results and experimental data.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Denis, Louis  ;  Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science
Nuttens, Vincent;  Ion Beam Applications, Louvain-la-Neuve, Belgium
Vanderheyden, Benoît  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Electronique et microsystèmes
Geuzaine, Christophe  ;  Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Applied and Computational Electromagnetics (ACE)
Language :
English
Title :
AC Loss Computation in Large-Scale Low-Temperature Superconducting Magnets: Multi-Scale and Semi-Analytical Procedures
Publication date :
March 2025
Journal title :
IEEE Transactions on Applied Superconductivity
ISSN :
1051-8223
Publisher :
Institute of Electrical and Electronics Engineers Inc.
Volume :
35
Issue :
2
Pages :
1-19
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
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since 14 January 2025

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