Experimental and numerical study of external plume Characteristics in microhollow cathode discharges

Author

Kothnur, Prashanth S. ; Shin, Jichul ; Raja, Laxminarayan L.

Author_Institution

Dept. of Aerosp. Eng. & Eng. Mech., Univ. of Texas, Austin, TX, USA

Volume

33

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

564

Lastpage

565

Abstract

Microhollow cathode (MHC) discharges are a class of miniature nonequilibrium high-pressure plasma discharges characterized by intense radiation and high gas temperatures. A prominent plume-like structure envelopes the region immediately outside the hollow cathode and the plume optical characteristics provide a direct indication of discharge behavior. Optical emission imaging and self-consistent numerical simulation of the discharge and in particular the plume are compared. Experimental trends of the plume size and intensity with varying discharge parameters are similar to computational results.

Keywords

cathodes; glow discharges; plasma diagnostics; plasma pressure; plasma production; plasma simulation; plasma temperature; external plume; hollow cathode; microhollow cathode discharges; nonequilibrium high-pressure plasma discharges; optical emission imaging; plume intensity; plume optical characteristics; plume size; self-consistent numerical simulation; Anodes; Cathodes; Fault location; Helium; Metastasis; Optical imaging; Plasma confinement; Plasma materials processing; Plasma simulation; Stimulated emission; Excited species; microhollow cathode discharges; optical imaging; self-consistent plasma simulation;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2005.845290

Filename

1420578