高功率Z-pinch装置5MV主开关及开关区设计

Design of the switch and switch section for high power Z-pinch facility

基于激光等离子体和过电压波击穿原理研制了应用于高功率“Z-pinch”装置的22级5 MV激光触发多级多通道开关,采用钳位环技术解决了狭小空间的匀场问题,过压自击穿间隙场分布不均匀度约为0.080,激光触发间隙场分布不均匀度约为0.056,由绝缘部件沿面电场强度决定的系统安全系数约为0.8。根据J.C.Martin公式和静电场分析计算结果,解决了高功率“Z-pinch”装置主开关及开关区的工程设计问题。

A 22 stage 5 MV laser-triggered multi-stage switch was designed based on the principle of laser-produced plasma and over-voltage wave. A metal ring was connected to a voltage divider to form a voltage-holding ring which was used to solve the problem of field regularity in small space. The relative difference of the electronic field of the selfbreakdown gaps was less than 0. 056 and the relative error of the electronic field of the laser-triggered gap was less than 0.080 in the voltage-holding ring scheme. The switch and switch container were designed based on the results of electrostatic calculation. The satety factor of the switch and its＇ container was 0. 8. The breakdown electronic field was calculated by J. C. Martin formula.