Quench-induced dynamic breakdown strength of liquid helium for superconducting coils

被引:2
作者
Chigusa, S [1 ]
Hayakawa, N [1 ]
Okubo, H [1 ]
机构
[1] Nagoya Univ, Dept Elect Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
关键词
quench; breakdown strength; insulation design;
D O I
10.1109/77.828530
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, we measured quench-induced dynamic breakdown strength of liquid helium (LHe) under various quench environment of superconducting (SC) coils for electrical insulation design of SC power equipment. Experimental results revealed that the dynamic breakdown strength of LHe drastically decreased with even small post-quench thermal energy of SC coils. However, the dynamic breakdown strength was improved with the increase in the pressure of LHe because of the suppression of thermal bubble disturbance in LHe. Moreover, we established 3-dimensional diagrams of the dynamic breakdown strength of LHe as a function of effective post-quench thermal energy density and pressure of LHe. The diagrams are applicable to the practical insulation design of SC equipment under quench environment.
引用
收藏
页码:1518 / 1521
页数:4
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