First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T
First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T
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首次在重达 25 吨的大型 20 煎饼原型上验证稳健的 REBCO 插入概念
DOI：
10.1109/tasc.2023.3255178
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发表时间：
2023
影响因子：
1.8
通讯作者：
Awaji S.
中科院分区：
文献类型：
--
作者：
Badel A.;Takahashi K.;Zampa A.;Okada T.;Nishijima G.;Uto T.;Takewa H.;Hanai S.;Ioka S.;Inagaki J.;Awaji S.
我们最近在一个项目框架中提出了一个强大的REBCO HTS（稀土BaCuO）插入线圈概念，该项目旨在将超导材料高场实验室的25 T无低温超导磁体升级到30 T。在这篇文章中，导体由两个磁带束组成，以减轻局部磁带退化带来的风险。所谓的边缘浸渍用于提高机械刚度，同时降低分层风险，同时提供传导冷却能力。由于早期检测概念，该插入件可以通过使用转储电阻器来防止热失控的风险。形成坚固的REBCO插入线圈概念的不同想法在各种小规模原型上成功地进行了测试。我们在这里报告了他们在大尺寸插入线圈上的首次实现，该线圈由30 T CSM升级插入的20个堆叠煎饼组成。建立了线圈的力学性能模型，并进行了实验验证。介绍了热失控检测装置。在前人热失控研究的基础上，讨论了其灵敏度和选择性。
We recently proposed a robust REBCO HTS (RareEarth BaCuO) insert coil concept in the framework of a project to upgrade the 25 T Cryogen-Free Superconducting Magnet at the High Field Laboratory For Superconducting Materials to reach 30 T. In this article, the conductor consists of a two-tape bundle to mitigate the risks posed by local tape degradation. So-called edge impregnation is used to enhance the mechanical stiffness while reducing delamination risk, providing conduction-cooling capability at the same time. This insert is to be protected against the risk of thermal runaway simply by using dump resistor, thanks to an early detection concept. The different ideas forming the robust REBCO insert coil concept were tested successfully on various small scale prototypes. We report here their first implementation on a large-size insert coil, consisting of 20 stacked pancakes from the 30 T CSM upgrade insert. The mechanical behavior of the coil is modelled and validated with experiments. The thermal runaway detection setup is introduced. Its sensitivity and selectivity is discussed based on previous works on thermal runaway scenarios.