Robust REBCO Insert Coil for Upgrade of 25 T Cryogen-Free Superconducting Magnet
Robust REBCO Insert Coil for Upgrade of 25 T Cryogen-Free Superconducting Magnet
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用于升级 25 T 无制冷剂超导磁体的坚固 REBCO 插入线圈
DOI：
10.1109/tasc.2021.3061896
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发表时间：
2021
影响因子：
1.8
通讯作者：
Kajikawa Kazuhiro
中科院分区：
文献类型：
--
作者：
Awaji Satoshi;Badel Arnaud;Okada Tatsunori;Takahashi Kohki;Miyazaki Hiroshi;Hanai Satoshi;Ioka Shigeru;Fujita Shinji;Muto Shogo;Iijima Yasuhiro;Daibo Masanori;Kajikawa Kazuhiro
25 T-CSM到30 T的升级项目正在东北大学IMR的HFLSM进行。目标是通过使用REBCO将当前的Bi 2223插入线圈替换为一个线圈，在32 mm的热孔中获得30 T。为了开发一个强大的REBCO高磁场插入，我们采用了两个磁带分裂导体与面对面的配置。我们证实，这种导体配置有效地减轻了R&D线圈中的局部缺陷所带来的风险：即使两个带中的一个上存在严重的局部缺陷，线圈Iceven的退化也可以忽略不计，从而实现了稳定的操作。通过双带束配置和厚铜稳定剂，可以使用早期检测方法防止REBCO插入件中可能的热点失超。使用这种导体的其他R&D线圈在高达460 MPa的大环向应力下进行测试，没有退化。在这些研发研究的基础上，我们设计了一种坚固耐用的REBCO刀片，用于升级。如果我们接受500 MPa的最大环向应力，所设计的REBCO内衬能够达到35 T并具有足够的Icmargin。
The upgrade project of the 25T-CSM to 30 T is on-going at HFLSM, IMR, Tohoku University. The goal is to obtain 30 T in a 32 mm warm bore by replacing the present Bi2223 insert coil with one wound using REBCO. In order to develop a robust REBCO high field insert, we adopt a two-tape bundle conductor with a face-to-back configuration. We confirmed that this conductor configuration mitigates effectively the risk posed by local defects in an R&D coil: a stable operation was achieved with negligible degradation in coil Iceven with a severe local defect on one of the two tapes. Quench protection from possible hotspot in the REBCO insert using an early detection method is made possible by the two-tape bundle configuration and the thick Cu stabilizer. Other R&D coils using such conductor were tested with large hoop stresses up to 460 MPa with no degradation. On the basis of these R&D studies, a robust REBCO insert is designed for the upgrade. The designed REBCO insert has a capability to achieve 35 T with enough Icmargin if we accept a maximum hoop stress of 500 MPa.
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影响因子：
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作者：
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影响因子：
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