同轴-三平板型水介质脉冲输出开关实验研究

 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。

Investigation of coaxial-triplate water dielectric output switch

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,80 mm and 50 mm for input and output elatrodes respectively，and each gap of the switch without PPS is plane to pin electrode（30 mm?