μs前沿百kV激光触发水开关的实验研究  

Investigation of laser-triggered water switch under 130kV microsecond rise-time pulse

作　　者：张信军[1] 吴撼宇[1] 

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《强激光与粒子束》2015年第4期228-231,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51237006);强脉冲辐射环境与效应国家重点实验室基金项目(SKLIPR1202)

摘　　要：开展了百kVμs前沿脉冲作用下激光触发水开关的研究。水开关采用球板电极结构,球头轴向开激光通孔,高压极为平板电极。开关自击穿电压133kV,抖动263ns。实验研究了激光击穿弧长占据间隙不同比例、不同触发能量和不同触发时刻等因素对触发抖动的影响。结果表明激光触发可将抖动有效减小到30ns以内。触发能量高于19mJ时触发抖动与能量大小关系不大。Experiments about the laser-triggered water switch under microsecond rise-time pulse were done.Relation between the jitter of trigger breakdown delay time and the length of laser-induced water breakdown arc,laser energy and trigger time was researched.A water gap was designed for these experiments.The gap has two electrodes,one is a hemispheroid and the other is a plate.A hole in the hemispheroid electrode is designed for the laser.From self-breakdown experiments results,self-breakdown voltage of the water switch is about 133 kV,and jitter of self-breakdown delay time is about 263 ns.The jitter of breakdown delay time was reduced to less than 30 ns by laser-triggering.The laser energy has little influence on the jitter of breakdown delay time when the energy is higher than 19 mJ in the experiments.

关 键 词：激光触发 水开关 抖动 击穿时延 

分 类 号：TM8[电气工程—高电压与绝缘技术] TN78[电子电信—电路与系统]