Role of Discharge Tube in Determination of Operating Mode in Waveguide-Based Atmospheric-Pressure Microwave-Induced Plasma

Author

Shou-Zhe Li ; Xin Zhang ; Chuan-Jie Chen ; Jialiang Zhang ; Yong-Xing Wang ; Guang-Qing Xia

Author_Institution

Key Lab. of Mater. Modification by Laser, Ion & Electron Beams, Dalian Univ. of Technol., Dalian, China

Volume

42

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

2776

Lastpage

2777

Abstract

The discharge mechanism of the atmospheric-pressure waveguide-based microwave plasma is investigated experimentally by considering the role of the discharge tube. When the radius of the aperture holes on the wide waveguide walls is equal to that of the thin-walled discharge tube, the plasma is induced in an equivalent resonator with a certain Q value, presenting a torch-like plasma. However, if there is a launching gap of enough interspace between the aperture holes and the discharge tube, a surfaguide plasma can be developed at atmospheric pressure.

Keywords

gas-discharge tubes; high-frequency discharges; plasma diagnostics; plasma filled waveguides; plasma torches; aperture holes; discharge mechanism; pressure 1 atm; surfaguide plasma; thin-walled discharge tube; torch-like plasma; waveguide-based atmospheric-pressure microwave-induced plasma; Apertures; Argon; Discharges (electric); Electromagnetic waveguides; Electron tubes; Plasmas; Surface waves; Atmospheric pressure; microwave; plasma; surfaguide; surfaguide.;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2014.2329893

Filename

6840354