激光触发开关触发延时及抖动特性  

Triggering Delay and Jitter of Laser Triggered Gas Switch

作　　者：殷毅[1] 杨杰[1] 钟辉煌[1] 杨建华[1] 罗皓飞[1] 洪志强[1] 

机构地区：[1]国防科技大学光电科学与工程学院,长沙410073

出　　处：《高电压技术》2014年第1期194-200,共7页High Voltage Engineering

基　　金：国家自然科学基金(11075209)~~

摘　　要：为了研究激光触发开关工作特性,实验中利用高压电容放电开关试验平台,对氮气气体开关在波长为1 064、532、266 nm脉冲激光触发作用下,不同欠压比、不同能量、不同焦距等情况下开关的延时和抖动特性进行了研究。实验结果表明:开关的延时、抖动随激光能量的增加、欠压比的增大而减小;激光聚焦情况下,激光能量触发阈值明显小于未聚焦情况;较长的激光焦距下,开关具有较小的延时和抖动;激光波长为266 nm时,开关触发工作特性要好于532 nm和1 064 nm激光;较小的激光通孔具有较好的开关工作特性;激光作用电极的材料为不锈钢时,开关的工作特性要好于黄铜电极。In order to investigate the working characteristics of laser triggered switch, adopting an experimental platform of high-voltage capacitance discharge, we studied the delay and jitter characteristics of N2 gas switch at a laser pulse of 1 064 rim, 532 rim, and 266 nm under the conditions of different percentages of self-breakdown voltage, different energy, and different focuses. The experimental results show that the delay time and jitter time decrease with the increasing laser energy or PSB. Compared with unfocused lasers, focused lasers have smaller trigger threshold. Switching characteristic of the LTGS is different with lenses of different focuses; the delay and jitter of the switch are smaller when it is triggered by 266 nm laser pulses. The gas switch with smaller hole for laser entering has better switch characteristics, compared with those with larger holes; the material of target electrode for the laser also affects the switching characteristics, for example, stainless electrode nerforms better than coooer one.

关 键 词：延时 抖动 激光触发 气体开关 电极材料 欠压比 

分 类 号：TM564[电气工程—电器]