Recent Developments in High-Temperature Superconducting Magnet Technology (Review)
Recent Developments in High-Temperature Superconducting Magnet Technology (Review)
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DOI：
10.1109/tasc.2013.2287707
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发表时间：
2014-06-01
影响因子：
1.8
通讯作者：
Yanagisawa, Yoshinori
中科院分区：
文献类型：
--
作者：
Maeda, Hideaki;Yanagisawa, Yoshinori
使用高温超导体（Furs）制成的磁体，如BSCCO和REBCO，容易提供更高的磁场和更高的工作温度，使超导磁体技术得到显着改进。LTS磁体技术在M. N. Wilson（超导磁体，Clarendon Press Oxford, 1983）和V. Iwasa（超导磁体案例研究，第二版，施普林格，2009）撰写的教科书中得到了很好的总结，涵盖了稳定性，保护，交流损耗等主题。相反，高温超导导体直到最近才商业化，因此高温超导导体的磁体技术仍然不发达，特别是REBCO导体。迄今为止，高温超导线圈遇到的技术问题是：1)屏蔽电流感应磁场的巨大影响；2)由于纵向和横向施加的过大机械应力导致线圈性能下降；3)在突然热失控的情况下难以保护磁体。本文综述了高温超导磁体在克服这些技术问题方面的最新进展。BSCCO和REBCO导体已被用于高磁场设施、核磁共振、核磁共振、磁悬浮列车等领域的高温超导磁体。筛选电流的影响是核磁共振、核磁共振和加速器的主要问题，因为它严重扭曲了空间场均匀性和时间场稳定性；另一方面，对于高场磁体来说，由于过度应力而导致的退化是实质性的。此外，在高电流密度高温超导磁体中，线圈保护是一个普遍而实质性的问题。本文综述了世界范围内开发BSCCO和REBCO磁体的活动。
The use of magnets made of high temperature superconductors (Furs) such as BSCCO and REBCO easily provide higher magnetic fields and higher operating temperatures, enabling dramatic improvements in superconducting magnet technology. The LTS magnet technology is very well summarized in text books written by M. N. Wilson (Superconducting magnets, Clarendon Press Oxford, 1983) and V. Iwasa (Case studies in superconducting magnets, 2nd edition, Springer, 2009), covering such topics as stability, protection, ac loss and so forth. To the contrary, HTS conductors were commercialized only recently and therefore the magnet technology for HTS conductors remains undeveloped, especially so in the case of REBCO conductors. The technological problems for HTS coils thus far encountered are 1) an enormous effect of a screening current-induced magnetic field, 2) degradation in the coil performance due to excessive mechanical stresses applied along the longitudinal and transverse direction, and 3) the difficulty in protecting the magnet in the case of an abrupt thermal runaway. This paper reviews recent progress in overcoming these technological problems for HTS magnets. Both BSCCO and REBCO conductors have been used for HTS magnets in areas such as high field facilities, NMR, MRI, magnetic levitation trains and so firth. The effect of the screening current is the major problem for NMR, MRI, and accelerators, as it substantially distorts spatial field homogeneity and temporal field stability; on the other hand, degradation due to excessive stresses is substantial for high field magnets. Additionally, coil protection is a common and substantive problem among high current density HTS magnets in general. World-wide activities in developing BSCCO and REBCO magnets are overviewed in this paper.