Electrical Breakdown Mechanism of Cryogenic Liquid Coolants in the Presence of Thermal Bubbles
Electrical Breakdown Mechanism of Cryogenic Liquid Coolants in the Presence of Thermal Bubbles
复制标题
热气泡存在下低温液体冷却剂的电击穿机制
DOI：
10.1541/ieejpes1990.111.4_352
复制
发表时间：
1991
影响因子：
--
通讯作者：
K. Saita
中科院分区：
文献类型：
--
作者：
M. Hara;J. Suehiro;I. Nakamura;K. Saita
研究了液氮或液氦在热诱导气泡存在下的电击穿机理，模拟了超导磁体的淬火状态。结果表明：根据外加电压的斜率，可将其击穿机理分为三种类型：快速上升电压下悬浮气泡不变形击穿、中等上升电压下悬浮气泡伸长击穿和缓慢上升电压下锁汽击穿。所研究的对象可能与超导脉冲磁体或交流超导装置中的交流损耗与高电压一起产生的现象密切相关。
Electrical breakdown mechanism of liquid nitrogen or liquid helium is investigated in the presence of thermally induced bubbles to simulate the quenching state in superconducting magnets. The results show that the mechanisms are classified into three categories which are related to the slope of the applied voltage : breakdown without deformation of suspended bubble at fast rising voltage, breakdown with elongation of suspended bubble at medium rising voltage and breakdown through locked vapor at slow rising voltage. The investigated subjects may relate closely to the phenomena in superconducting pulsed magnets or AC superconducting apparatus in which AC loss is produced together with a high voltage.