Investigation on the electrode surface roughness effects on a repetitive self-breakdown gas switch  

作　　者：Fanzheng ZENG Song LI Hao CAI Quancai ZHANG Jinhong WEI Junting WANG Zhaohua LIU Lei WANG Jingming GAO Hong WAN Baoliang QIAN 曾凡正;李嵩;蔡浩;张全才;韦金红;王俊婷;刘照华;王蕾;高景明;万红;钱宝良(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,People's Republic of China;The 93986 Unit,Hotan 848000,People's Republic of China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,People's Republic of China)

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,People's Republic of China [2]The 93986 Unit,Hotan 848000,People's Republic of China [3]College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,People's Republic of China

出　　处：《Plasma Science and Technology》2022年第6期182-188,共7页等离子体科学和技术（英文版）

基　　金：Huxiang Youth Talent Support Program(No.2020RC3030);State Key Laboratory of Pulsed Power Laser Technology(No.SK2021ZR02)。

摘　　要：In this work,the influence of the electrode surface roughness on the self-breakdown gas switch is investigated by physical analysis,computer simulation and experiment.Cu-W electrodes of different surface roughness were tested under the conditions of a pulse repetitive frequency of50 Hz,self-breakdown voltage of~30 kV,and peak current of~2 k A for~93000 shots(the total charge transferred was~15 C).The coefficients of variation of the self-breakdown voltage of Cu-W 0.8,Cu-W 3.2 and Cu-W 12.5 electrodes were~2.95%,~1.62%and~1.16%,respectively.With the increase of electrode roughness,the erosion area decreased continuously,indicating that the breakdown positions were more stable and the coefficient of variation of breakdown voltage decreased.The method showed that decreasing the coefficient of variation of the self-breakdown voltage by increasing the surface roughness of electrode greatly improves the stability of the self-breakdown switch,which is significant for their application in compact highpower pulse power devices over a long time with stable operation.

关 键 词：gas switch self-breakdown surface roughness coefficient of variation 

分 类 号：TN782[电子电信—电路与系统]