Eur. Phys. J. Appl. Phys.
Volume 47, Number 2, August 200911th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI)
|Number of page(s)||6|
|Section||11th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI)|
|Published online||28 April 2009|
Influence of surface charges on the structure of a dielectric barrier discharge in air at atmospheric pressure: experiment and modeling
École Centrale Paris, EM2C Laboratory, CNRS UPR 288, Grande voie des vignes, 92295 Châtenay-Malabry Cedex,
2 École Polytechnique, LPP Laboratory, CNRS UMR 7648, Route de Saclay, 91128 Palaiseau Cedex, France
Corresponding author: email@example.com
Accepted: 2 February 2009
Published online: 28 April 2009
Dielectric barrier discharges (DBD) in air at atmospheric pressure and at low frequency are mainly constituted of thin transient plasma filaments (or microdischarges) with radii of a few hundreds of micrometers. In this work, we consider a point-to-plane geometry with the dielectric covering the plane electrode. Plasma filaments are initiated by streamers, starting from the high-field region close to the point electrode. The plasma filaments deposit charges on the dielectric plate which screen the electric field and lead to an extinction of the discharge filaments. In this work we experimentally demonstrate the synchronous start of several filaments in a time range of less than a few tens of nanoseconds and we show that the charges deposited on the dielectric have a strong impact on the discharge structure. This is validated using a simple electrostatic model. Then, the dynamics of the 2D streamer propagation in the gas gap and its interaction with the dielectric plane is calculated. The influence of space charges and surface charges on the discharge structure are discussed and compared with the experiment.
PACS: 52.80.-s – Electric discharges / 52.80.Hc – Glow; corona / 51.50+v – Electrical properties (ionization, breakdown, electron and ion mobility, etc.) / 52.65.-y – Plasma simulation
© EDP Sciences, 2009
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