GaAs-PCSS多通道同步导通条件实验研究  

Experimental study on multi-channel synchronous conduction conditions of GaAs-PCSS

作　　者：刘毅[1] 谌怡[1] 夏连胜[1] 王卫[1] 叶茂[1] 张篁[1] Liu Yi;Shen Yi;Xia Liansheng;Wang Wei;Ye Mao;Zhang Huang(Institute of Fluid Physics,CAEP,P.O.Box 919-106,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所

出　　处：《强激光与粒子束》2020年第2期25-30,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目（51507162,51407169,51607166）;国家自然科学基金委员会与中国工程物理研究院联合基金项目（U1530156）

摘　　要：砷化镓光导开关(GaAs-PCSS)是具有快响应、高重频、低抖动、高功率容量的半导体光电导开关,多通道设计能够有效降低GaAs-PCSS非线性大电流导通时的损伤,提高开关寿命。为探究GaAs-PCSS多通道同步导通的必要条件,在基于固态脉冲形成线的实验平台上,通过特殊设计的夹具,将多枚GaAs-PCSS并联连接以作为脉冲形成电路的开关,以对各GaAs-PCSS施以不同的触发信号进行测试。实验结果证明:相同触发信号下,开关导通电流被成功地均分到4个GaAs-PCSS通道中;不同触发信号下,为获得较好的电流均分效果,各通道触发延迟时差须小于1 ns,触发能量差须小于20μJ。设计了分体式、单体式两种结构的多通道GaAs-PCSS,其中基于刻蚀工艺的单体式20通道GaAs-PCSS在7000余次大电流工作后仅发生轻微损伤。Gallium Arsenide Photoconductive Semiconductor Switch(GaAs-PCSS)has outstanding features,such as,fast response,high repetition,low jitter and high-power capacity.Multi-channel design can effectively reduce the damage from high current in nonlinear mode and improve switch’s lifetime.In this paper,on the solid-state pulse forming line experimental platform,multiple GaAs-PCSSs are connected in parallel as one switch through a special fixture,and different trigger signals are applied to each of them,in order to study the necessary conditions for GaAs-PCSS multi-channel synchronous conduction.The results show that,firstly,by the same trigger signals,the on-current is successfully divided into 4 GaAs-PCSS channels;secondly,by different trigger signals,the delay time difference and trigger energy difference must be lower than 1 ns and 20μJ respectively,if an effective current diversion is expected;thirdly,split and integrated multi-channel GaAs-PCSS structures are designed,and the integrated 20-channel GaAs-PCSS was slightly damaged after 7000 shots.

关 键 词：砷化镓光导开关 多通道 同步 触发延迟时差 触发能量 

分 类 号：TM834[电气工程—高电压与绝缘技术]