Development of a Detachable Current Feeder Terminal for Direct Excitation of Magnetically Levitated High-temperature Superconducting Coils
Development of a Detachable Current Feeder Terminal for Direct Excitation of Magnetically Levitated High-temperature Superconducting Coils
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磁悬浮高温超导线圈直接励磁可拆卸馈电端子的研制
DOI：
10.2221/jcsj.38.560
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Nagayama
中科院分区：
文献类型：
--
作者：
K. Ohkuni;Y. Ogawa;J. Morikawa;D. Hori;S. Yamakoshi;N. Yanagi;T. Mito;T. Uede;T. Nagayama
一个内部线圈设备，迷你RT，正在建造的高β等离子体约束研究的磁悬浮高温超导（HTS）线圈产生的磁场的手段。在Mini-RT中，线圈通过可拆卸的电流馈电端子由DC电源直接充电，因此，必须抑制由于接触电阻而在端子处产生焦耳，以减少热传播到HTS线圈。三种不同的端子与接触弹簧进行了试制，并在室温和液氮温度下进行了检查。两种温度下的接触电阻取决于端子和弹簧材料。我们为Mini-RT选择了最佳端子，并确认设计值与结果之间的差异小于20%。
An internal coil device, Mini-RT, is being constructed for high-beta plasma confinement studies by means of the magnetic field generated using a magnetically levitated high-temperature superconducting (HTS) coil. In the Mini-RT, the coil is directly charged by a DC power supply through removable current feeder terminals, and therefore, the generation of joules at the terminals as the result of contact resistance must be suppressed in order to reduce heat propagation to the HTS coil. Three different terminals with contact springs were trial manufactured and examined under room and liquid nitrogen temperatures. The contact resistances at both temperatures depended on the terminals and the spring materials. We selected the best terminals for Mini-RT, and confirmed that the differences between the design values and the results were less than 20 percent.