Shielding current in a copper-plated multifilament coated conductor wound into a single pancake coil and exposed to a normal magnetic field
Shielding current in a copper-plated multifilament coated conductor wound into a single pancake coil and exposed to a normal magnetic field
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DOI：
10.1088/1361-6668/ab3f1c
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发表时间：
2019-11-01
影响因子：
3.6
通讯作者：
Sakamoto, Hisaki
中科院分区：
文献类型：
--
作者：
Amemiya, Naoyuki;Sogabe, Yusuke;Sakamoto, Hisaki
将一个由镀铜复丝涂层导体缠绕的具有四根细丝的单个扁平线圈置于尖形磁场中，并在30K下测量线圈附近的磁场。通过使用缠绕有单丝涂覆的导体的另一个参考单个扁平线圈来进行类似的实验。对这些线圈进行了电磁场数值分析，并将计算的屏蔽电流感应场（SCIF）与两个线圈中的测量值进行了比较。的时间行为的计算SCIF在线圈缠绕的四丝涂层导体进行了比较，一系列的指数分量，其中的耦合时间常数外推短样品实验被用作时间常数的主要组成部分。将卷绕成扁平线圈的涂覆导体中的电流分布可视化。特别讨论了四丝涂层导体中电流分布的时间行为及其对SCIF的影响。
A single pancake coil wound with a copper-plated multifilament coated conductor, with four filaments, was put in a cusp magnetic field, and the magnetic field was measured near the coil at 30K. A similar experiment was performed by using another reference single pancake coil wound with a monofilament coated conductor. Numerical electromagnetic field analyses of these coils were carried out, and the calculated shielding current-induced fields (SCIFs) were compared with the measured ones in both coils. The temporal behaviour of the calculated SCIF in the coil wound with the four-filament coated conductor was also compared with a series of exponential components, in which a coupling time constant extrapolated from short sample experiments was used as the time constant of the primary component. Current distributions in the coated conductors wound into the pancake coils were visualised. In particular, the temporal behaviours of the current distributions in the four-filament coated conductor and their influence on the SCIF were discussed.