Splice resistance measurements of REBCO tapes for a REBCO sextuple magnet
Splice resistance measurements of REBCO tapes for a REBCO sextuple magnet
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REBCO 六重磁铁的 REBCO 胶带的熔接电阻测量
DOI：
10.1109/tasc.2019.2908603
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
A. Kikuchi
中科院分区：
文献类型：
--
作者：
X. Wang;M. Uchida;K. Tsuchiya;A. Terashima;T. Takao;A. Kikuchi
从磁体制造的角度来看，REBa2Cu3Oy (REBCO) 超导磁体需要低电阻和高机械强度的接头。在之前的研究中，我们设计了一个原型 REBCO 六极磁体。为了制造六极磁体，表征 REBCO 胶带的熔接电阻的低温和高磁场性能非常重要。因此，我们在本研究中测量了三个制造商的 4 毫米宽商业 REBCO 胶带在 77 和 4.2 K 下的熔接电阻。熔接电阻的磁场特性在 4.2 K 下测定高达 10 T。改变焊料成分和两个 REBCO 胶带的熔接方向等参数，以阐明每种参数对熔接电阻特性的影响。拼接电阻主要由两个 REBCO 胶带的拼接方向决定。当两个胶带的 REBCO 层处于最接近的方向时，40 毫米长接头的最小熔接电阻在 4.2 K 和自场中约为 16.5 nΩ。与原始磁带相比，拼接部分的临界电流和 n 值没有明显下降。
The REBa2Cu3Oy (REBCO) superconducting magnet requires low-resistance and high-mechanical-strength splices from a standpoint of magnet manufacturing. In the previous study, we designed a prototype REBCO sextupole magnet. To fabricate the sextupole magnet, it is important to characterize low-temperature and high-magnetic-field performances of the splice resistance of REBCO tapes. For that reason, we measured the splice resistance of 4-mm-wide commercial REBCO tapes of three manufacturers at 77 and 4.2 K in this study. The magnetic field characteristics of the splice resistance was determined up to 10 T at 4.2 K. Parameters such as solder compositions and splicing orientations of two REBCO tapes were varied to clarify the impact of each on the splice resistance characteristics. The splice resistance was determined primarily by the splicing orientation of two REBCO tapes. The minimum splice resistance of the 40-mm-long joint was approximately 16.5 nΩ at 4.2 K and in self-field when REBCO layers of two tapes were in closest orientation. The critical current and n-value of the splice section showed no appreciable degradation compared to those of the original tape.