同轴-三平板型水介质脉冲输出开关实验研究  

Investigation of coaxial-triplate water dielectric output switch

作　　者：夏明鹤[1] 孟维涛[1] 丰树平[1] 王玉娟[1] 卫兵[1] 计策[1] 傅贞[1] 田青[1] 任靖[1] 卿艳玲[1] 谢卫平[1] 李洪涛[1] 邓建军[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2007年第8期1404-1408,共5页High Power Laser and Particle Beams

基　　金：国防科技基础研究基金资助课题

摘　　要：设计了用于脉冲功率装置的4 MV水介质同轴-三平板型输出开关。该脉冲功率装置将由24路相同的独立模块组成,每路模块由Marx发生器、中间储能器、激光触发气体开关、脉冲形成线、水介质脉冲输出开关、脉冲传输线等组成。水介质脉冲输出开关是同轴-三平板结构水介质多通道自击穿开关,由输入输出电极、预脉冲屏蔽板和连接部件组成。进行了有预脉冲屏蔽板结构和无预脉冲屏蔽板结构的自击穿水开关实验研究。有预脉冲屏蔽板结构开关的输入、输出电极都是半球电极,直径分别是8 cm和5 cm;无预脉冲屏蔽板结构开关为针-板结构,输入电极为平板电极,输出电极为直径3 cm的电极棒。Marx发生器充电70 kV,开关的击穿电压为3 MV,放电电流为450 kA。在3 MV等级的击穿电压下,有预脉冲屏蔽板结构开关的抖动约6 ns,没有预脉冲屏蔽板结构开关的抖动减小至3 ns。A 4 MV coax-to-triplate multi-channel water dielectric self-breaking switch is designed for the oil and water section of a pulse power machine. The machine contains 24 modules with identical components. Eeach module contains Marx generator, intermediate store capacitor, laser triggered gas switch, water pulse forming line, water self-breaking switch, transmission line and water resistance load. The water switch consists of three linear arrayed self-breaking gaps, a prepulse shield（PPS） and supporting hardware. An experiment is conducted to investigate the switch with or without PPS. Each gap of the switch with PPS is made up of two hemispherical electrodes,Ф80 mm and Ф50 ram for input and output elatrodes respectively, and each gap of the switch without PPS is plane to pin electrode（Ф30 ram）. The length of the switch section and the inductance of the switch without PPS are smaller than those of the switch with PPS. The switch breaks down at about 3 Mv with a 450 kA current when the Marx generator is charged to 70 kV. The jitter is 6 ns and 3 ns for the switch with and without PPS, respectively.

关 键 词：自击穿开关 去离子水 预脉冲 抖动 

分 类 号：TN782[电子电信—电路与系统]