Experimental Results of the HTS Floating Coil Using REBCO Tapes for the Mini-RT Upgrading
Experimental Results of the HTS Floating Coil Using REBCO Tapes for the Mini-RT Upgrading
复制标题
使用 REBCO 胶带进行 Mini-RT 升级的 HTS 浮动线圈的实验结果
DOI：
10.1109/tasc.2013.2287706
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发表时间：
2014
影响因子：
1.8
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Natsume;K. ; Terazaki;Y. ; Mito;T. ; Yanagi;N. ; Ogawa;Y. ; Morikawa;J. ; Uchijima;K. ; Hosaka;Y. ; Nose;S. ; Tomioka;A. ; Itoh;I. ; Takada;E. ; Konno;M. ; Ohaku;M.
等离子体物理实验装置Mini-RT的升级计划是用最新的REBCO带材缠绕的新线圈取代磁悬浮高温超导线圈。新的高温超导线圈的性能已在国家聚变科学研究所进行了检查。线圈通过冷氦气的强制流动间接冷却到35 K。线圈成功地激发到100 A与适当的持续电流开关（PCS）的操作。霍尔探头给出的中心磁场为0.21T，与数值计算的结果一致。在持续电流模式期间的电流衰减的时间常数进行了评估，在线圈温度为36和41 K分别为306和228小时。这些值与基于测量的接头电阻的估计一致，并且它们比10年前缠绕的Mini-RT的先前浮置线圈（老化劣化前41小时）长得多。试验结果表明，所研制的REBCO浮置线圈性能良好，可进一步推动Mini-RT项目的实施。
The upgrading plan of the Mini-RT which is an experimental device for plasma physics was initiated to replace the magnetically-levitated high temperature superconducting (HTS) coil by the new one wound with the latest REBCO tapes. The performance of the new HTS coil has been examined at the National Institute for Fusion Science. The coil was indirectly cooled to 35 K by forced flow of cold helium gas. The coil was successfully excited up to 100 A with a proper persistent current switch (PCS) operation. The central field given by the Hall probe was 0.21 T, which was the same with that expected by a numerical calculation. The time constant of the current decay during the persistent current mode was evaluated at the coil temperature of 36 and 41 K to be 306 and 228 h, respectively. These values are consistent with the estimation based on the measured joint resistances and they are much longer than that of the previous floating coil of Mini-RT wound 10 years ago (41 h before aged deterioration). By the test results, it has been confirmed that the promising performance of the manufactured REBCO floating coil has been achieved to further promote the Mini-RT project.