| 制冷机冷却的超导磁体在励磁时的稳定性分析 |
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| 引用本文： | 刘宏伟,余运佳,王秋良. 制冷机冷却的超导磁体在励磁时的稳定性分析[J]. 低温物理学报, 2005, 27(4): 375-379 |
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| 作者姓名： | 刘宏伟 余运佳 王秋良 |
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| 作者单位： | 中国科学院电工研究所应用超导重点实验室,北京,100080;中国科学院电工研究所应用超导重点实验室,北京,100080;中国科学院电工研究所应用超导重点实验室,北京,100080 |
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| 摘 要： | 制冷机冷却的超导磁体是超导磁体技术的发展方向.在磁体励磁时,可能会因为交流损耗和稳恒漏热的共同作用而导致磁体温度上升到电流分流温度,进一步导致失超.因而励磁时的制冷机冷却的超导磁体的稳定性尤为重要.基于磁体内的漏热分析和励磁时交流损耗的计算,数值模拟了励磁时磁体的温度分布,研究了在制冷机冷却方式下超导磁体的稳定方面的问题.
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| 关 键 词： | 超导磁体 制冷机 稳定性 励磁 |
| 收稿时间： | 2004-12-20 |
| 修稿时间： | 2005-03-02 |
STABILITY STUDY ON CRYOCOOLER-COOLED SUPERCONDUCTING MAGNETS DURING CURRENT EXCITATION |
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| LIU HONG-WEI,YU YUN-JIA,WANG QIU-LIANG. STABILITY STUDY ON CRYOCOOLER-COOLED SUPERCONDUCTING MAGNETS DURING CURRENT EXCITATION[J]. Chinese Journal of Low Temperature Physics, 2005, 27(4): 375-379 |
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| Authors: | LIU HONG-WEI YU YUN-JIA WANG QIU-LIANG |
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| Affiliation: | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | A cryocooler-cooled superconducting magnet is one of the trends for magnet technology. When the superconducting magnet is charged, ac loss is generated and it causes the coll temperature to rise. When the magnet temperature is above current sharing temperature, the magnet will become resistive, and the cryocooler cannot cool down the magnet further during this positive feedback process. The magnet will quench in the end. So the stability is especially important for cryocooler-cooled superconducting magnet at such circumstance. Based on thermal analysis for the magnet, study has been carried out on the stability of cryocooler-cooled superconducting magnet during current excitation. |
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| Keywords: | superconducting magnet cryocooler stability current excitation |
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