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

• Published in: IEEE transactions on plasma science Vol. 33; no. 2; pp. 564 - 565
• Main Authors: Kothnur, P.S., Shin, J., Raja, L.L.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-04-2005; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Anodes; Cathodes; Computer simulation; Emission; Emissions; Excited species; Fault location; Gas temperature; Indication; Mathematical models; Metastasis; microhollow cathode discharges; Miniature; Optical imaging; Optical measuring instruments; Plasma; Plasma confinement; Plasma materials processing; Plasma simulation; Plumes; self-consistent plasma simulation; Simulation; Stimulated emission
• ISSN: 0093-3813; 1939-9375
• DOI: 10.1109/TPS.2005.845290

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.