一种多间隙气体开关击穿特性的实验研究  

Experimental Studies of a Multigap Gas Switch for Fast Linear Transformer Drivers

作　　者：姜晓峰[1] 孙凤举[1] 梁天学[1] 曾江涛[1] 刘轩东[2] 尹佳辉[1] 

机构地区：[1]西北核技术研究所,西安710024 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2009年第1期103-107,共5页High Voltage Engineering

基　　金：国家自然科学基金(5047701950637010)~~

摘　　要：快前沿直线型变压器驱动源(FLTD)是一种可以直接获得100 ns脉宽的脉冲功率源新技术,在Z箍缩、闪光照相、强激光和高功率微波方面具有重要应用。为了寻求用于FLTD的多间隙气体开关的合适结构,设计了一种场畸变多间隙气体开关。该开关含有6个间隙,各个间隙距离相等,开关间隙总长度为30 mm。开关中间电极为锚式固定结构,每个电极由3只螺钉固定在绝缘筒壁内侧,数值计算了开关的电场分布,实验研究了开关的自击穿及触发特性。结果表明,开关自击穿特性曲线与经验公式曲线基本符合,自击穿电压的分散性<3.2%;在工作系数为50%时,开关仍能正常触发,触发时延约百ns;在工作系数为60%时,触发脉冲为150 kV/15 ns的情况下,开关触发时延约60 ns,抖动时间约5 ns。Fast linear transformer driver （FLTD） is a novel high pulsed power source that can directly drive fast Zpinch load, radiography, high power laser and high power microwave etc. Switch is one of the most important components which affects the characteristic of LTD module. A new multigap gas switch has been developed, which is composed of six equal gaps in series. The total gap distance is 30 mm. In the switch, every intermediate electrode is anchored to the insulated casing by three bolts. The electric field distribution of the switch has been analyzed for designing switch. Experimental results show that the curve of the switch self-breakdown voltage is conformable to the empirical formula ,and the divergence of the switch self-breakdown voltage is less than 3.2 %. When the ratio charging voltage to self-breakdown voltage is 50%, the switch can be triggered easily and the delay time is about 100 ns. When the ratio charging voltage to self-breakdown voltage reaches 60% and the trigger pulse is 150 kV/15 ns, the delay time reduces to 60 ns, and the jitter time is less than 5 ns.

关 键 词：直线型变压器驱动源 气体开关 击穿特性 多间隙 多通道放电 低抖动 

分 类 号：TM564[电气工程—电器]