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Title: Electrically efficient production of a diffuse nonthermal atmospheric plasma
Authors: Deng, X.T.
Kong, Michael G.
Keywords: Atmospheric pressure nonthermal plasmas
Gas discharge
Plasma modeling
Pulse plasmas
Issue Date: 2003
Publisher: © IEEE
Citation: DENG, X.T. and KONG, M.G., 2003. Electrically efficient production of a diffuse nonthermal atmospheric plasma. IEEE Transactions on Plasma Science, 31(1), pt.1, pp.7-18.
Abstract: Diffuse nonthermal gas discharges generated at atmospheric pressure have found increasing applications in many key materials processing areas such as etching, deposition, and structural modification of polymeric surfaces. To facilitate tailored and improved applications of these novel gas plasmas, we consider their pulsed generation based on one-dimensional numerical simulation of helium-nitrogen discharges.We consider four waveforms of the plasma-generating voltage, namely: 1) sinusoidal; 2) peaklevelled sinusoidal; 3) peak-levelled and tail-trimmed sinusoidal; and 4) pulsed with a Gaussian-shaped tail, all at the same repetition frequency of 10 kHz. For each case, voltage and current characteristics are calculated and then used to assess whether the generated plasma is diffuse and nonthermal. Densities of electrons, ions, and metastables are calculated, together with the dissipated electric power in the plasma bulk. It is found that plasma pulsing can significantly reduce the electric power needed to sustain diffuse nonthermal atmospheric plasmas. Specifically by choosing appropriate pulse shape, the plasma-sustaining power can be reduced by more than 50% without reducing densities of electrons, ions, and metastables. On the other hand, electron density can be enhanced by 68% with the same input electric power if the pulsewidth is suitably narrowed.
Description: This article was published in the journal, IEEE Transactions on Plasma Science [© 2003 IEEE] and is also available at: http://ieeexplore.ieee.org/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Version: Published
DOI: 10.1109/TPS.2003.808884
URI: https://dspace.lboro.ac.uk/2134/5222
ISSN: 0093-3813
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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