Formation of Large-Volume High-Pressure Plasma in Triode-Configuration Discharge Devices  

作　　者：江超 王又青 

机构地区：[1]State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China Hubei Key Laboratory of Bioanalytical Technique, Hubei Normal University, Hubei 435002, China Department of Physics, Hubei Normal University, Hubei 435002, China [2]State Key Laboratory of Laser Tehnology, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Plasma Science and Technology》2006年第2期185-189,共5页等离子体科学和技术（英文版）

基　　金：supported by the Scientific Research Foundation of Education Department of Hubei Government(D20062202);the Scientific Research Foundation of Huang Shi City Government (2005)

摘　　要：A ＂plane cathode micro-hollow anode discharge （PCHAD）＂ is studied in comparison with micro-hollow cathode discharge （MHCD）. A new triode-configuration discharge device is also designed for large-volume, high-pressure glow discharges plasma without glow-to-arc transitions, as well as with an anode metal needle, and a cathode of PCHAD. It has a ＂needle-hole＂ sustained glow discharge. Its discharge circuit employs only one power supply circuit with a variable resistor. The discharge experiments have been carried out in the air. The electrical properties and the photoimages in PCHAD, multi-PCHAD and ＂needle-hole＂ sustained discharge have been investigated. The electrical and the optical measurements show that this triode-configuration discharge device can operate stably at high-pressure, in parallel without individual ballasting resistance. And the electron density of the plasma is estimated to be up to 10^12cm^-3. Compared with the twosupply circuit system, this electrode configuration is very simple with lower cost in generating large-volume plasma at high pressures.A ＂plane cathode micro-hollow anode discharge （PCHAD）＂ is studied in comparison with micro-hollow cathode discharge （MHCD）. A new triode-configuration discharge device is also designed for large-volume, high-pressure glow discharges plasma without glow-to-arc transitions, as well as with an anode metal needle, and a cathode of PCHAD. It has a ＂needle-hole＂ sustained glow discharge. Its discharge circuit employs only one power supply circuit with a variable resistor. The discharge experiments have been carried out in the air. The electrical properties and the photoimages in PCHAD, multi-PCHAD and ＂needle-hole＂ sustained discharge have been investigated. The electrical and the optical measurements show that this triode-configuration discharge device can operate stably at high-pressure, in parallel without individual ballasting resistance. And the electron density of the plasma is estimated to be up to 10^12cm^-3. Compared with the twosupply circuit system, this electrode configuration is very simple with lower cost in generating large-volume plasma at high pressures.

关 键 词：gas discharge high-pressure plasma plane-cathode current-voltage characteristic 

分 类 号：O53[理学—等离子体物理]