多间隙气体开关紫外光预电离结构  

UV pre-ionizing structures for multi-gap gas switch

作　　者：孙铁平[1] 丛培天[1] 盛亮[1] 黄涛[1] 张国伟[1] 郭宁[1] 韩娟娟[1] 吴撼宇[1] 李岩[1] 李阳[1] 罗维熙[1] 王亮平[1] 曾正中[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《强激光与粒子束》2011年第10期2806-2810,共5页High Power Laser and Particle Beams

基　　金：西北核技术研究所预研基金项目(11031003)

摘　　要：针对一种用于快前沿直线脉冲变压器驱动源的多间隙气体开关,设计了针式和孔式两种预电离触发结构,获得了两种预电离结构下开关的自击穿特性和触发特性。实验结果表明:增加预电离针后,开关静态特性没有明显变化,开关自击穿电压平均值变化幅度小于3%;开关触发特性明显改善,开关工作电压150kV、触发电压60kV时,触发抖动减小约20%,触发阈值降低5～10kV。对于针式预电离结构,实验研究了不同触发电压、工作气压、电离间隙距离时紫外光强度的变化规律,结果表明在电离间隙距离1.5～3.0mm时,开关触发抖动小于2.0ns,预电离效果明显。This paper summarizes the structural design and experimental study of UV pre-ionizing for multi-gap gas switch.The structures of needle UV pre-ionizing and hole UV pre-ionizing are designed.Static properties of switches with three trigger structures are obtained.There is no evident change of static field in switches and the change of self-breakdown voltage is under 3% with UV pre-ionizing.The jitter of UV pre-ionizing switches is about 20% less than that of the switch without UV pre-ionizing.The needle UV pre-ionizing method can lower the trigger voltage by 10 kV,and the hole UV one by 5 kV.For needle UV pre-ionizing,the UV intensity with different trigger voltages,gas pressures and distance of UV gap are measured.The optimum distance of UV gap is experimentally determined as 1.5 mm to 3.0 mm and the jitter of switch is under 2.0 ns.

关 键 词：多间隙气体开关 紫外光预电离 自击穿电压 触发抖动 

分 类 号：TM85[电气工程—高电压与绝缘技术]