100kV重频气体开关初步研究及应用  

Investigation and application of 100 k V repetitive gas switches

作　　者：伍友成[1] 耿力东[1] 何泱[1] 戴文峰[1] 曹龙博 冯传均 王敏华[1] 付佳斌[1] 杨宇[1] 张南川[1] 郝世荣[1] 

机构地区：[1]中国工程物理研究院流体物理研究所脉冲功率科学与技术重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2016年第2期155-159,共5页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：为了减小脉冲功率源装置的体积,对三电极气体开关和两电极气体开关的结构进行了小型化设计.采用电磁场仿真软件对局部结构进行优化,对初步设计的触发开关和自击穿开关在不同SF6气压（0-0.2MPa）、不同开关间隙条件下的击穿电压及触发工作电压等进行了实验研究.结果表明：设计的触发开关和自击穿开关在0-0.2MPa气压范围内,自击穿电压随气压具有很好的线性关系;自击穿开关间隙为8mm,改变气压（0.1-0.2MPa）可实现自击穿电压90-125kV 可调;触发开关主间隙为7mm,改变气压（0.1-0.2MPa）可实现触发工作电压40-95kV 可调;初步估算,触发开关和自击穿开关的工作电感均约20nH.利用重频脉冲电源,测试了开关的重频工作能力,在工作电压80kV、导通电流约20kA的条件下,重复工作频率在20Hz以上.此外,利用研制的开关构建了八级紧凑型Marx发生器,实现了5和10Hz重频多脉冲输出.The tri-electrode gas switch and two-electrode rail-gap switch were designed. Experiments for breakdown-voltage and repetitive operation of these switches were done in different gas pressure and gap conditions. The results show the relation between breakdown-voltage and gas pressure is linear. Breakdown-voltage of two-electrode rail-gap switch with 8 mm gap can be adjusted from 90 to 125 k V at gas pressure 0. 1 to 0. 2 MPa. Operating voltage of trigger switch with 7 mm gap can be adjusted from 40 to 95 k V. Repetitive operation rate of these switches was up to 20 Hz with 20 k A current. Based on these switches,an 8-stage compact Marx generator was setup.Multi-pulse output with 5 or 10 Hz repetitive rate was gained in experiments. The output peak power was about 7 GW for 5 Hz,and 3. 5GW for 10 Hz with pulse width( FWHM) of 150 ns.

关 键 词：气体开关 重复频率 MARX发生器 多脉冲 

分 类 号：TN782[电子电信—电路与系统]