4MV激光触发多级多通道开关特性  

Switching property of 4 MV laser-triggered multistage switch

作　　者：李洪涛[1] 王玉娟[1] 丰树平[1] 谢卫平[1] 邓建军[1] 丁伯南[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2007年第11期1923-1926,共4页High Power Laser and Particle Beams

基　　金：国家留学基金资助课题(2005489002)

摘　　要：报道了4 MV激光触发多级多通道开关的结构设计和初步的实验结果及分析。该开关采用轴向聚焦触发方式,设计为匀场结构,采用场调整环与匀压环调整开关间隙电场分布,电极-绝缘子序列采用堆栈结构替代榫接结构,独立定位、紧固。实验结果表明:4 MV激光触发多级多通道开关的自击穿电压偏差小于5%,自击穿电压与工作气压呈良好的线性关系;触发延迟时间约25 ns,极差小于±2.5 ns,抖动1.5 ns;等工作电压-气压比条件下,随着气压和工作电压的上升触发延迟时间及其抖动趋向下降。The design and experimental results of the 22-stage 4 MV laser-triggered multi-channel switch are reported. The field distribution of the laser-triggered gap and the serial selfbreakdown gaps are symmetrical. The selfbreakdown gap is designed as an annular gap formed by disk electrodes and a column insulator stack. The field distribution of the switch section is regulated by the voltage-holding field regulation ring. The experimental results show that the maximal deviation of the selfbreakdown voltage is less than 5 %. The difference between the average selfbreakdown voltage and the linear fit is less than 5% The switch is triggered by a 4 ns, 35 mJ Nd：YAG fourth harmonic laser pulse. The delay is about 25 ns as the working ratio is 85%3% of the selfbreakdown voltage. The maximal deviation of the delay is less than ±2.5 ns. The jitter is 1.5 ns. The delay and its jitter decrease with the increase of the pressure or voltage when the ratio of the voltage to the pressure is kept as constant.

关 键 词：激光触发 多级多通道开关 触发延迟 抖动 自击穿电压 

分 类 号：TN248[电子电信—物理电子学]