https://doi.org/10.1140/epjb/s10051-025-00994-3
Regular Article - Solid State and Materials
Optimized design and performance test of 16 kA HTS current leads used for fusion HTS magnets
1
Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, China
2
China Electric Power Research Institute, Beijing, China
3
State Grid Jiangsu Electric Power Research Institute Co., Ltd, Nanjing, China
Received:
4
April
2025
Accepted:
25
June
2025
Published online:
3
July
2025
Heat leakage from current leads is a primary factor influencing the heat load of large superconducting magnet systems. High Temperature Superconducting current leads (HTSCL), in comparison to traditional copper current leads, can significantly reduce both Joule heat and conductive heat leakage in superconducting magnet systems, thereby reducing operational costs. This paper provides a comprehensive optimization of a pair of 16 kA HTSCL intended for the performance test of HTS fusion magnets. Several optimization models were constructed to determine the optimal parameters. The heat load and maximum current-carrying capacity of 16 kA HTSCL are calculated and optimized, and the performance in steady state and loss of flow accident (LOFA) transient process are also analyzed. After about a year of manufacturing, this 16 kA HTSCL were tested in November 2024. The performance test scheme and test results are introduced in detail, mainly including steady state test, LOFA test, joint resistance test, etc. The experimental results are in good agreement with the simulation results, with all indicators meeting the design requirements for fusion HTS magnets.
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
