Title :
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
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.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2329893
