12级LTD脉冲源触发支路气体开关击穿特性  

Discharge characteristics of trigger brick gas switches for 12-stage linear transformer driver

作　　者：降宏瑜 姜晓峰[2] 王志国[2] 孙凤举[2] 魏浩[2] 楼成 邱爱慈[1,2] Jiang Hongyu;Jiang Xiaofeng;Wang Zhiguo;Sun Fengju;Wei Hao;Lou Cheng;Qiu Aici(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西安交通大学电工材料电气绝缘全国重点实验室,西安710049 [2]西北核技术研究所,强脉冲辐射模拟与效应全国重点实验室,西安710024

出　　处：《强激光与粒子束》2024年第11期115-120,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51790521,51790523)。

摘　　要：12级串联太瓦级直线型变压器驱动源(LTD)采用内置时序触发新方法,对触发支路气体开关提出了低自放概率、低触发阈值、低抖动、触发延时可调的技术要求。介绍了自行研制的基于电阻均压/电晕辅助触发技术的气体开关结构和工作原理;建立了气体开关特性测试平台,完成了12只气体开关的老练和击穿特性测试;开关应用于12级LTD脉冲源级联触发实验,获得了不同工作电压、工作系数下的触发特性参数。实验结果表明:开关工作电压±60~±80 kV,工作系数60%~80%,抖动小于2 ns,500余发实验未发生自放电,实现了12级LTD脉冲源触发支路按理想时序依次导通,触发时序系数0.83~1.17范围内可调。The 12-stage linear transformer driver(LTD)adopts the novel method of internal in situ triggering in sequence,and puts forward the technical requirements of low pre-fire probability,low trigger threshold voltage,low jitter and adjustable trigger delay time for the trigger brick gas switches.This paper introduces the structure and working principle of the trigger brick gas switch based on resistance voltage balance and corona assisted triggering technology.The test platform of gas switch characteristics is established,and after the process of conditioning,the breakdown characteristics of 12 gas switches are tested.Then,the switches are applied to the 12-stage LTD to carry out cascade triggering experiments,and the triggering characteristic parameters under different charging voltages and working coefficients are obtained.The experimental results show that,when the charging voltage of the switch is±60−±80 kV and the working coefficient is 60%−80%,the jitter is lower than 2 ns,and there is no pre-fire in more than 500 shots.The trigger brick gas switches of the 12-stage LTD can be sequentially closed according to the ideal sequence,and the trigger sequence coefficient can be adjusted in the range of 0.83−1.17.

关 键 词：直线型变压器驱动源 触发支路 低自放概率 低触发阈值 级联触发 

分 类 号：TM836[电气工程—高电压与绝缘技术] TL51[核科学技术—核技术及应用]