Glow Discharges Observed in Capacitive Radio‐Frequency Atmospheric‐Pressure Plasma Jets

Content Provider	Semantic Scholar
Author	Laimer, Johann Störi, Herbert
Copyright Year	2006
Abstract	The APPJ is the subject of intensive recent research. Basically, the APPJ consists of an atmospheric-pressure RF discharge between two bare metallic electrodes and of a superimposed gas flow consisting predominantly of a rare gas. In its usual operating regime, a uniform glow discharge, which was identified as the α mode of a RF discharge, can be sustained over a wide range of gap spacings and RF powers. Maximum electron densities of0.22 × 10 12 cm -3 were assessed for helium and of 2.75 × 10 12 cm -3 for argon by evaluation of electric measurements using a simple equivalent circuit model. At low RF powers, only partial coverage of the electrodes was observed. At high RF powers, a breakdown of the α sheath occurred, and a transition to either a pure y mode or a coexisting a and y mode took place. The y mode covers only a small fraction of the electrode surface. In helium, it was easy to ignite directly a pure α discharge, but not in argon. Due to the high over-voltage needed, the ignition in argon mostly led to a coexisting α and y mode. However, through RF power reduction a transition to a pure α discharge can be initiated.
File Format	PDF HTM / HTML
DOI	10.1002/ppap.200600046
Alternate Webpage(s)	http://www.surfxtechnologies.com/fileaway-directory/full/116.%20%20Glow%20Discharges%20Observed%20in%20Capacitive%20Radio-Frequency%20Atmospheric-Pressure%20Plasma%20Jets.pdf
Alternate Webpage(s)	https://doi.org/10.1002/ppap.200600046
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article