Self-field measurements of an HTS twisted stacked-tape cable conductor

For a twisted stacked-tape cable (TSTC) conductor composed of REBCO tapes, self-field measurements were conducted with Hall sensors. In the measurements, a 650 mm diameter single turn coil wound with the TSTC conductor, which was made with 48 REBCO tapes whose width was 6 mm, was utilized as a test sample. Based on the measurement results, the current distribution of the TSTC conductor was investigated with analytical models. The analytical results indicate the current distribution of the TSTC is uniform under the condition that the operating current is 10 kA and the sample temperature is approximately 30 K. On the other hand, the current distribution is not uniform at the excitation and the degauss of the TSTC conductor with the ramp rate of 50 A/s.

针对由REBCO带材构成的扭绞堆叠带材电缆（Twisted Stacked-Tape Cable, TSTC）导体，采用霍尔传感器开展了自场测量。本次测量中，以该TSTC导体绕制的直径650 mm单匝线圈作为测试样品，该线圈由48根宽度为6 mm的REBCO带材绕制而成。基于测量结果，采用解析模型对该TSTC导体的电流分布特性开展了研究。解析计算结果表明，当工作电流为10 kA且样品温度约为30 K时，该TSTC导体的电流分布均匀一致。另一方面，当以50 A/s的升降速率对该TSTC导体进行励磁和退磁时，其电流分布并不均匀。