Impact of Indentation on the Performance of MgB2 Round Wire
Impact of Indentation on the Performance of MgB2 Round Wire
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DOI：
10.1109/tasc.2017.2660300
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发表时间：
2017-06
影响因子：
1.8
通讯作者：
C. Dai;J. Qin;Bo Liu;Peihang Liu;Yu Wu;Chen-shan Li;Q. Hao;Sheng Liu;A. Nijhuis;Chao Zhou
中科院分区：
文献类型：
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作者：
C. Dai;J. Qin;Bo Liu;Peihang Liu;Yu Wu;Chen-shan Li;Q. Hao;Sheng Liu;A. Nijhuis;Chao Zhou
与NbTi相比，MgB2圆线具有更大的t裕度，是一种很有前途的低磁场导体熔芯电缆材料。这是一个有竞争力的候选馈线，极向磁场或校正线圈。由于MgB2对应变敏感，因此将考虑采用短扭节距电缆模式。在电缆和导体的制造过程中，绞线上的压缩是不可避免的，因为短扭节距的电缆会在绞线上产生更严重的压痕。以往的研究表明，压痕会导致Nb3Sn和Bi-2212圆线临界电流的降低。本文对MgB2圆线进行了同样的研究，测量了人工压痕样品的临界电流，并将结果与人工压痕Nb3Sn、NbTi和Bi-2212圆线进行了比较。
MgB2 round wire is a promising material for future fusion Cable in Conduit Conductor applied in low magnetic field, due to its larger T-margin compare with NbTi. It's a competitive candidate for feeders, poloidal field or correction coils. Since MgB2 is sensitive to strain, a short twist pitch cable pattern will be taken into consideration. During cabling and conductor manufacturing, the compression on the strand is inevitable, for a cable with short twist pitch can make more severe indentation on the strands. Previous studies have shown that indentation can caused degradation of the critical current of Nb3Sn and Bi-2212 round wires. So the same research is performed on MgB2 round wire, in this paper, the critical current of artificially indented samples is measured, and the results are compared with artificially indented Nb3Sn, NbTi and Bi-2212 round wires.