强激光与粒子束2018，Vol.30Issue(2)：71-75,5.DOI:10.11884/HPLPB201830.170370
"神龙二号"气体火花开关中绝缘结构的 电场分析与优化
Electric field analysis and optimization of the insulation system in gas-filled spark gap switch of Dragon-Ⅱ accelerator
摘要
Abstract
In linear induction accelerator,Z-pinch and other large pulsed power devices,the gas-filled spark gap switches as key components are widely used.Unreasonable insulation system may bring excessively high partial electric field and accumulated charges to the gas-filled spark gap switch.The surface flashover would occur while the gas-filled spark gap switches are working under long time or high frequency high voltage pulse.The surface flashover will directly affect the pulsed power devices.Hence, we discussed the mechanism of accumulated charge influence on surface flashover by finite-element electric-field analysis of gas-filled spark gap switch insulation system.The surface electric field strength of insulator and electrodes were reduced by optimizing the structure of insulator and shapes of electrode surface.The results show that:the electric field strength in anode triple junction was decreased from 9.4 kV/mm to 1.5 kV/mm,the electric field strength in cathode triple junction was decreased from 2.95 kV/mm to 0.98 kV/mm,the maximum electric field strength in insulator surface was decreased from 10.8 kV/mm to 4.95 kV/mm.The electric field distribution of optimized insulation system was more reasonable than that of original system,and the prob-ability of surface flashover resulted by accumulated charges would be reduced.关键词
气体火花开关/沿面闪络/表面电荷/绝缘子/电场分布/绝缘结构优化Key words
gas-filled spark gap switch/surface flashover/surface charge/insulator/electric field distribution/in-sulation system optimization分类
数理科学引用本文复制引用
武庆周,李劲,李远,高峰,黄子平,陈茂,刘邦亮.."神龙二号"气体火花开关中绝缘结构的 电场分析与优化[J].强激光与粒子束,2018,30(2):71-75,5.基金项目
国家自然科学基金项目(51607165,11675159) （51607165,11675159）
中国工程物理研究院科学技术发展基金项目(2015B0402077,2015B0402076) （2015B0402077,2015B0402076）
