Performance study of a new epoxy resin IR-3 in HTS-based high-field magnet application
Performance study of a new epoxy resin IR-3 in HTS-based high-field magnet application
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DOI：
10.1088/2053-1591/ac7287
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发表时间：
2022-06-01
影响因子：
2.3
通讯作者：
Xu, Qingjin
中科院分区：
文献类型：
--
作者：
Yao, Huanli;Zhang, Zhen;Xu, Qingjin
REBCO（稀土基钡氧化铜）导体是高磁场磁体应用的合适材料。利用环氧树脂真空浸渍是超导线圈稳定运行的一种广泛应用的技术。然而，环氧树脂浸渍的REBCO线圈经常遇到严重的电流降解问题。寻找合适的浸渍材料对REBCO线圈在高场超导磁体中的应用具有重要意义。最近研制出一种新型韧性环氧树脂IR-3。深入了解IR-3对REBCO线圈性能的影响对其应用至关重要。因此，本文探讨了IR-3浸渍对77 K和4.2 K REBCO线圈性能的影响。试验结果与ctd - 101k和MY750浸渍的类似线圈进行了比较。同时，模拟了自场77 K和10 T下4.2 K的径向应力。经77 K热循环后，所有环氧树脂浸渍的REBCO线圈的临界电流均无衰减。当在5 T和10 T的外场中以4.2 K充电时，IR-3浸渍的REBCO线圈避免了性能下降问题，并具有优异的电稳定性。IR-3具有优异的低温性能，是一种很有前途的高场REBCO线圈浸渍材料。
REBCO (Rare-earth-based barium copper oxide) conductors are appropriate materials for high-field magnet applications. Vacuum impregnation using epoxy resin is a technique widely used for stable operation of superconducting coils. However, epoxy-impregnated REBCO coils often experience critical current degradation problems. Finding a suitable impregnating material for REBCO coils is important for their application in high-field superconducting magnets. A new toughness epoxy, IR-3, was developed recently. An in-depth understanding of IR-3 on the performance of REBCO coils is critically necessary for its application. Thus, this paper explores the effects of IR-3 impregnation on the performance of REBCO coils at 77 K and 4.2 K. The test results are compared to similar coils impregnated with CTD-101 K and MY750. Meanwhile, the radial stresses at 77 K in self-field and 4.2 K under 10 T were simulated. All epoxy impregnated REBCO coils showed no decay in critical current after thermal cycles at 77 K. When charged at 4.2 K in external fields of 5 T and 10 T, the IR-3 impregnated REBCO coils avoided performance degradation problems and had superior electrical stabilities. Combing the excellent performance at low temperatures, IR-3 is a promising candidate material for impregnating high-field REBCO coils.