Characteristics of a large gap uniform discharge excited by DC voltage at atmospheric pressure  

作　　者：李雪辰 鲍文婷 贾鹏英 赵欢欢 狄聪 陈俊英 

机构地区：[1]College of Physics Science & Technology,Hebei University [2]Key Laboratory of Photo-Electronics Information Materials of Hebei Province

出　　处：《Chinese Physics B》2014年第9期288-293,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.10805013 and 51077035);the Funds for Distinguished Young Scientists of Hebei Province of China(Grant No.A2012201045);the Natural Science Foundation of Hebei Province of China(Grant No.A2011201132);the Department of Education for Outstanding Youth Project of China(Grant No.Y2011120);the Funds for Distinguished Young Scientists of Hebei University of China(Grant No.2010J02);the Doctor Program of Hebei University of China(Grant No.2012-241);the Youth Project of Hebei University of China(GrantNo.2011Q14)

摘　　要：A large-gap uniform discharge is ignited by a coaxial dielectric barrier discharge and burns between a needle anode and a plate cathode under a low sustaining voltage by feeding with flowing argon. The basic aspects of the large-gap uniform discharge are investigated by optical and spectroscopic methods. From the discharge images, it can be found that this discharge has similar regions with glow discharge at low pressure except a plasma plume region. Light emission signals from the discharge indicate that the plasma column is invariant with time, while there are some stochastic pulses in the plasma plume region. The optical emission spectra scanning from 300 nm to 800 nm are used to calculate the excited electron temperature and vibrational temperature of the large-gap uniform discharge. It has been found that the excited electron temperature almost keeps constant and the vibrational temperature increases with increasing discharge current. Both of them decreases with increasing gas flow rate.A large-gap uniform discharge is ignited by a coaxial dielectric barrier discharge and burns between a needle anode and a plate cathode under a low sustaining voltage by feeding with flowing argon. The basic aspects of the large-gap uniform discharge are investigated by optical and spectroscopic methods. From the discharge images, it can be found that this discharge has similar regions with glow discharge at low pressure except a plasma plume region. Light emission signals from the discharge indicate that the plasma column is invariant with time, while there are some stochastic pulses in the plasma plume region. The optical emission spectra scanning from 300 nm to 800 nm are used to calculate the excited electron temperature and vibrational temperature of the large-gap uniform discharge. It has been found that the excited electron temperature almost keeps constant and the vibrational temperature increases with increasing discharge current. Both of them decreases with increasing gas flow rate.

关 键 词：large-gap uniform discharge plasma plume plasma column optical emission spectrum 

分 类 号：O461[理学—电子物理学]