期刊
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
卷 31, 期 5, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2021.3069685
关键词
Electromagnetic stress; high field superconducting magnet; hoop stress; REBCO coil
资金
- JSPS KAKENHI [18H05248]
- Grants-in-Aid for Scientific Research [18H05248] Funding Source: KAKEN
The upgrading of the 25T cryogen-free superconducting magnet to a 30T-class magnet using REBCO coils is being considered. The strategy involves adopting a two tapes co-winding technique to increase the current density and prevent hotspot generation. Electromagnetic and mechanical properties of two bundle co-wound pancake coils were investigated as part of the R&D process for the 30T-class superconducting magnet.
An upgrading of the 25 T cryogen-free superconducting magnet (CSM) at the HFLSM to a 30T-class CSM is considered by replacing the present Bi2223 insert coil with a REBCO ones, since REBCO tapes have better mechanical and in-field critical current properties. In our strategy for the REBCO coil of the 30T-CSM, two tapes co-winding technique will be adopted in order to increase the space current density in the coil and to avoid a hotspot generation due to local degradation. Electromagnetic and mechanical properties of two bundle co-wound (two-ply) pancake coils are investigated as an R&D test coil for the 30T-CSM. The R&D coils were fabricated with Fujikura REBCO tapes that have 4.1 mm width and 0.11 or 0.15 mm thickness depending on the coil. The coil voltages and strains were measured at 4.2 K under a background field of 11 T. The maximum hoop stress up to 460-530 MPa at the outermost winding estimated by the BJR relation was applied, and no degradation by the hoop stress was found.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据