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Title: Electron avalanches and diffused γ-mode in radio-frequency capacitively coupled atmospheric-pressure microplasmas
Authors: Liu, D.W.
Iza, Felipe
Kong, Michael G.
Keywords: Electron avalanches
Electron avalanches
Glow discharges
Helium
High-frequency discharges
Plasma diagnostics
Plasma impurities
Plasma sheaths
Issue Date: 2009
Publisher: © American Institute of Physics
Citation: LIU, D.W., IZA, F. and KONG, M.G., 2009. Electron avalanches and diffused γ-mode in radio-frequency capacitively coupled atmospheric-pressure microplasmas. Applied Physics Letters, 95 (3), article 031501, pp.1-3.
Abstract: Space-, time- and wavelength-resolved optical emission profiles suggest that the helium emission at 706 nm can be used to indicate the presence of high energy electrons and estimate the sheath in helium rf discharges containing small concentration of air impurities. Furthermore, the experimental data supports the theoretical predictions of energetic electron avalanches transiting across the discharge gap in rf microdischarges and the absence of an α-mode. Nonetheless, microdischarges sustained between bare metal electrodes and operating in the γ-mode can produce diffuse glowlike discharges rather than the typical radially constricted plasmas observed in millimeter-size rf atmospheric-pressure γ discharges.
Description: Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the authors and the American Institute of Physics. This article appeared in the journal, Applied Physics Letters, and may be found at: http://link.aip.org/link/?APPLAB/95/031501/1
Version: Published
DOI: 10.1063/1.3186073
URI: https://dspace.lboro.ac.uk/2134/5213
ISSN: 0003-6951
1077-3118
Appears in Collections:Published Articles (Electronic, Electrical and Systems Engineering)

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