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

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 met...

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Published inChinese physics B Vol. 23; no. 9; pp. 288 - 293
Main Author 李雪辰 鲍文婷 贾鹏英 赵欢欢 狄聪 陈俊英
Format Journal Article
LanguageEnglish
Published 01.09.2014
Subjects
Constants
Discharge
Electric potential
Electron temperature
Excitation
Invariants
Plumes
Sustaining
Voltage
兴奋
大气压力
差距
振动温度
放电特性
直流电压
等离子体羽
间隙均匀
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Summary: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.
Bibliography:large-gap uniform discharge, plasma plume, plasma column, optical emission spectrum
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.
11-5639/O4
Li Xue-Chen, Bao Wen-Ting, Jia Peng-Ying, Zhao Huan-Huan, Di Cong, Chen Jun-Ying（1. College of Physics Science ＆ Technology, Hebei University, Baoding 071002, China; 2. Key Laboratory of Photo-Electronics Information Materials of Hebei Province, Baoding 071002, China）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/9/095202