摘要
MV pulsed switch plays a key role as the transfer switch in large electromagnetic pulse simulators. To broaden the range of self-triggering time, a novel spark-discharge pre-ionization switch, in which the main gap electric field is superposed at the trigger gap to let the electrons in its spark channel also become initial electrons, is proposed and tested. The design idea is: as electrons in the spark channel of the trigger gap always exist after its breakdown, the injection time of pre-ionization should have a more negligible effect on reducing the switch jitter. The experiment results under pulses with a rise time of ~100 ns support the above assumptions.When the operating voltage is from ~300 to ~800 kV and the self-triggering time is ~45% to~75% of the peak time, the breakdown time delay jitter is less than 2 ns, and the breakdown voltage jitter is smaller than 1.25%. Under specific self-triggering time, the breakdown time delay jitter is less than 1.5 ns, and the breakdown voltage jitter is smaller than 0.8%.
作者
Tianchi WANG
Yingchao DU
Wei CHEN
Junna LI
Haiyang WANG
Tao HUANG
Linshen XIE
Le CHENG
Ling SHI
王天驰;杜应超;陈伟;李俊娜;王海洋;黄涛;谢霖燊;程乐;石凌(Key Laboratory of Particle&Radiation Imaging(Tsinghua University),Ministry of Education,Beijing 100084,People's Republic of China;Department of Engineering Physics,Tsinghua University,Beijing 100084,People's Republic of China;State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi'an 710024,People's Republic of China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi'an 710049,People's Republic of China)
