Persistent-current switch for pancake coils of rare earth-barium-copper-oxide high-temperature superconductor: Design and test results of a double-pancake coil operated in liquid nitrogen (77-65 K) and in solid nitrogen (60-57 K).
Persistent-current switch for pancake coils of rare earth-barium-copper-oxide high-temperature superconductor: Design and test results of a double-pancake coil operated in liquid nitrogen (77-65 K) and in solid nitrogen (60-57 K).
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DOI：
10.1063/1.4961622
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发表时间：
2016-08
影响因子：
4
通讯作者：
T. Qu;P. Michael;J. Voccio;J. Bascuñân;S. Hahn;Y. Iwasa
中科院分区：
文献类型：
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作者：
T. Qu;P. Michael;J. Voccio;J. Bascuñân;S. Hahn;Y. Iwasa
我们展示了一种用于稀土钡铜氧化物（REBCO）高温超导（HTS）薄饼线圈的超导持续电流开关（PCS）的设计和测试结果。在此，一个内径152毫米、外径168毫米、高12毫米的REBCO双饼（DP）线圈采用无绝缘技术绕制。我们将每个薄饼最外层约10厘米长的一段转换为一个PCS。该DP线圈在液氮（77 - 65 K）和固态氮（60 - 57 K）中运行。在本实验的工作温度范围内，正常态的PCS使DP线圈能够通电；于是，PCS恢复到超导状态，并且DP线圈磁场以100小时的时间常数衰减，如果线圈端子间的连接是超导的，这个时间常数将几乎是无穷大，即持续模式运行。
We present design and test results of a superconducting persistent current switch (PCS) for pancake coils of rare-earth-barium-copper-oxide, REBCO, high-temperature superconductor (HTS). Here, a REBCO double-pancake (DP) coil, 152-mm ID, 168-mm OD, 12-mm high, was wound with a no-insulation technique. We converted a ∼10-cm long section in the outermost layer of each pancake to a PCS. The DP coil was operated in liquid nitrogen (77-65 K) and in solid nitrogen (60-57 K). Over the operating temperature ranges of this experiment, the normal-state PCS enabled the DP coil to be energized; thereupon, the PCS resumed the superconducting state and the DP coil field decayed with a time constant of 100 h, which would have been nearly infinite, i.e., persistent-mode operation, were the joint across the coil terminals superconducting.