Title :
Filamentation of Diffuse
Atmospheric Pressure Glow Discharges in a Metal Pin–Water Electrode Geometry
Author :
Walsh, James L. ; Bruggeman, Peter
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Liverpool, Liverpool, UK
Abstract :
The filamentation of a microsecond pulsed He- H2O glow discharge generated in a metal pin-water surface configuration is studied by fast imaging and current-voltage measurements. The instability leading to the constriction of the glow discharge starts from the metal electrode independent of the polarity. The dynamics of the constricted channel share similarities with plasma bullets and streamers, but the timescales are typically an order of magnitude slower due to the space charge of the glow discharge.
Keywords :
electrodes; filamentation instability; glow discharges; helium neutral atoms; plasma diagnostics; plasma pressure; plasma sources; water; He-H2O; current-voltage measurements; diffuse helium-water atmospheric pressure glow discharges; fast imaging; glow discharge constriction; metal electrode; metal pin-water electrode geometry; microsecond pulsed helium-water glow discharge; plasma filamentation; pressure 1 atm; Cathodes; Glow discharges; Helium; Ionization; Metals; Plasmas; Atmospheric pressure glow discharges; plasma bullets; plasma jets; plasma liquid interaction;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2011.2148127