一种大电流三电极气体火花开关的工作特性  

Operating Characteristics of a Heavy Current Three-electrode Gas Spark Switch

作　　者：程新兵[1] 刘金亮[1] 陈蒸[1] 殷毅[1] 冯加怀[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《高电压技术》2009年第7期1689-1694,共6页High Voltage Engineering

基　　金：国家自然科学基金(10675168)~~

摘　　要：根据强流电子加速器的需要,研制了一种大电流三电极气体火花开关。开关采用防污染设计,将开关电极与金属腔体一体化,并采用金属挡板对绝缘封盖进行防污保护,从最大程度上减小了开关工作时对绝缘支撑物的污染,提高了开关寿命,并且对开关工作特性进行了实验研究。研究结果表明:当开关工作气压为0.10、0.15、0.20和0.25MPa时,其可控工作电压范围分别为25%～94%、38%～86%、40%～88%和44%～88%,具有可控工作电压范围宽的优点;当开关工作气压为0.25MPa、工作电压为40kV、欠压比为88%时,开关时延为50ns,抖动为1.28ns且分散性<3%,该开关已成功用于强流电子加速器系统且运行稳定可靠。To meet the requirements of intense current electron accelerator, we researched and designed a kind of three electrode gas spark switch. Anti-pollution design was used in the switch, the outer housing of the switch was made of Cu and a metal baffle was used to prevent the top plate. These measures can Prevent arc form approaching the insulated bracket as far as possible and increase the life of the switch. Furthermore, the operating characteristics of the three electrode gas spark switch were experimentally researched, including relationship between the selfbreakdown characteristics and gas pressure, the time delay, jitter et al. the experimental results indicate that the operating ranges of the switch are 25% ~94% ,38%-86% ,40%-88% and 44%-88% when the gas pressure are 0. 10, 0.15, 0.20 and 0.25 MPa, respectively. And when the operating pressure is 0. 25 MPa, the operating voltage is 40 kV which is about 88% of self-breakdown voltage; delay time, 50 ns; jitter, 1.28 ns; deviation, less than 3%. The switch has been applied in the intense electron-beam accelerators, and it works stably and reliably.

关 键 词：脉冲功率技术 三电极气体火花开关 大电流 长寿命 时延 抖动 

分 类 号：TM564[电气工程—电器]