Cryocooler-cooled high T/sub c/ superconducting magnet excited by a hybrid semiconductor-HTS thermoelectric element
Cryocooler-cooled high T/sub c/ superconducting magnet excited by a hybrid semiconductor-HTS thermoelectric element
复制标题
由混合半导体-高温超导热电元件激励的低温冷却器冷却高 T/sub c/超导磁体
DOI：
10.1109/tasc.2005.849152
复制
发表时间：
2005
影响因子：
1.8
通讯作者：
T. Okamura
中科院分区：
文献类型：
--
作者：
M. Ono;T. Kuriyama;A. Oguchi;T. Okamura
介绍了利用热电元件的热电动势激励低温冷却器冷却高温超导磁体的研究进展。由于该系统不需要外部电源，因此在紧凑性和重量方面优于常规HTS磁体系统。因此，它适用于对空间和重量有严格限制的地方。为了改进这种磁体系统，我们提出了由热电半导体和超导体组成的新型热电元件的概念。该混合元件被动地利用超导体作为热电材料，并且理想地将每单位电流（Q/I）的低温热泄漏减少一半。本文报道了用超导-高温超导热电元件混合激励高温超导线圈的实验。结果表明，用这种混合元件代替常规的p型和n型半导体元件具有明显的优点。
This paper describes progress in a cryocooler-cooled HTS magnet excited by a thermo-electromotive force of a thermoelectric element. Since this system requires no external power sources, there are advantages in compactness and weight over conventional HTS magnet systems. Thus, it is suitable for applications in places where constraints on space and weight are severe. For improvement of this magnet system, we present a concept of the new thermoelectric element which consists of a thermoelectric semiconductor and a superconductor. This hybrid element passively utilizes a superconductor as a thermoelectric material and decreases the cryogenic heat leakage per unit current (Q/I) ideally by half. In this paper, experiments of an HTS coil excitation with a hybrid semiconductor-HTS thermoelectric element are reported. It is shown that there are some obvious merits in using the hybrid element as a substitute for a normal p- and n-type semiconductor element.