Self-Adjusting Characterization for Steady-State, Direct Current Cathode-Dominated Glow Discharge Plasmas at High Pressures  

作　　者：DING Fang ZHENG Shi-Jian KE Bo TANG Zhong-Liang ZHANG Yi-Chuan YANG Kuan XIE Xin-Hua ZHU Xiao-Dong 丁芳;郑仕健;柯博;汤中亮;张一川;杨宽;谢新华;朱晓东(CAS Key Laboratory of Basic Plasma Physics,Department of Modern Physics,University of Science and Technology of China,Hefei 230026;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031)

机构地区：[1]CAS Key Laboratory of Basic Plasma Physics,Department of Modern Physics,University of Science and Technology of China,Hefei 230026 [2]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031

出　　处：《Chinese Physics Letters》2013年第8期107-109,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11075158;the Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China(No J1103207)。

摘　　要：A steady-state,direct-current high-pressure CH_(4)-H_(2) glow discharge in a cup-shaped cathode parallel to anode configuration is investigated by using their V–I characteristics and CCD images.The discharges display an abnormal glow feature,and an expansion of a negative glow is observed on the cathode sidewall with the increasing discharge current.There exists a dependence of voltage on gas pressure for different fixed currents.The voltage decreases with gas pressure initially,and then increases conversely,which is correlated with the glow states of the cathode sidewall.This study exhibits a self-adjusting characterization for plasmas in cathode fall,which is important for maintaining steady-state,abnormal glow discharge in a relatively high pressure range.

关 键 词：initially SHAPED CATHODE 

分 类 号：O53[理学—等离子体物理]