A novel method for multichannel discharge image diagnosis in gas switches based on multi-axis tomography techniques  

作　　者：张艳红 盛亮 李阳 张美 黑东炜 Yanhong ZHANG;Liang SHENG;Yang LI;Mei ZHANG;Dongwei HEI(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi'an 710024,People's Republic of China)

机构地区：[1]State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi'an 710024,People's Republic of China

出　　处：《Plasma Science and Technology》2023年第6期65-71,共7页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.11575147);the Distinguished Youth Fund(No.JQZQ021901)。

摘　　要：The discharge channel is a crucial diagnostic tool for identifying the properties of gas switches.However,single-view images cannot easily be used to inherently understand the discharge channel characteristics of trigger electrodes.A reconstruction method of the discharge channel in gas switches is proposed based on a multi-axis tomography technique,which uses very few projections of optical images to reconstruct the location of a multichannel discharge in annular electrodes.In this paper,an algorithm named TVM-OSEM(total variation minimization ordered subsets expectation maximization)is proposed,which can effectively remove artifact noise to improve the reconstruction accuracy of discharge channels.The method is validated against simulations of a radiator with high-density-difference boundary.The calculated discharge channel distribution from one experiment is presented.

关 键 词：discharge channel TVM-OSEM gas switch LOCATION 

分 类 号：TM855[电气工程—高电压与绝缘技术] TP391.41[自动化与计算机技术—计算机应用技术]