Mechanical and electromagnetic characteristics of MgB2 wires & Cable-in-Conduit Conductors for fusion magnet application
A study on a 4-stage sub-size MgB 2 Cable-in-Conduit Conductor (CICC), tested at the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), revealed a 20% degradation in critical current at 4.2 K compared to single-strand data. To address this issue, the mechanical properties of MgB 2 wires from Hyper Tech and WST were investigated, and two sub-size CICCs were manufactured using a “close-to-1-ratio” Twente design with smaller diameter wires. These cables demonstrated no significant degradation in critical current after cabling and compaction, nor after electromagnetic load cycling. The results indicate that the close-to-1-ratio cable design is optimal for brittle superconducting materials such as MgB 2 , Nb 3 Sn, and BSCCO, as it minimizes mechanical stress and preserves superconducting properties. This design shows significant potential for the application of MgB 2 in next-generation fusion reactors, particularly in Poloidal Field (PF) coils, Correction Coils (CC), and feeders.
Authors
- Peng Gao (ORCID: https://orcid.org/0000-0003-4512-056X)
- Chao Dai (ORCID: https://orcid.org/0000-0002-6559-1708)
- Xintao Zhang (ORCID: https://orcid.org/0000-0003-0827-819X)
- Weijun Wang (ORCID: https://orcid.org/0000-0003-1463-6483)
- Huajun Liu (ORCID: https://orcid.org/0000-0002-0540-6486)
- Tianli Dai (ORCID: https://orcid.org/0000-0002-5582-9807)
- Arend Nijhuis (ORCID: https://orcid.org/0000-0002-1600-9451)
- Jiahao Wan
- Chao Zhou (ORCID: https://orcid.org/0000-0003-0219-4067)
- Yishan Chen (ORCID: https://orcid.org/0009-0004-4469-6748)
- Huan Jin (ORCID: https://orcid.org/0009-0002-8390-6192)
- Hongjun Ma (ORCID: https://orcid.org/0000-0002-8490-5514)
- Fang Liu (ORCID: https://orcid.org/0000-0002-6996-3978)
- Mike Tomsic
- Min Yu (ORCID: https://orcid.org/0000-0003-1430-2803)
- M. Rindfleisch
- Jinggang Qin (ORCID: https://orcid.org/0000-0002-5652-3447)
Institutions
- University of Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Institute of Plasma Physics (CN)
- Hyper Tech Research (United States) (US)
- University of Twente (NL)
Publication Details
- Journal
- Superconductivity
- Published
- 2025-03-01
- DOI
- https://doi.org/10.1016/j.supcon.2025.100155
- Citations
- 5
- Primary Topic
- Superconductivity in MgB2 and Alloys
- Type
- article
- Field-Weighted Citation Impact
- 6.29
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences