Issue Eur. Phys. J. Appl. Phys. Volume 47, Number 2, August 2009 11th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI) Article Number 22808 Number of page(s) 4 Section 11th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI) DOI 10.1051/epjap/2009082 Published online 28 April 2009

Eur. Phys. J. Appl. Phys. 47, 22808 (2009)
DOI: 10.1051/epjap/2009082

Hexagonal and honeycomb structures in Dielectric Barrier Discharges

B. Bernecker^{1, 2}, T. Callegari^{1, 2}, S. Blanco^{1, 2}, R. Fournier^{1, 2} and J.P. Boeuf<sup>1, 2

1</sup>  Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d'Énergie, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
²  CNRS LAPLACE, 31062 Toulouse, France

benoit.bernecker@laplace.univ-tlse.fr

Received: 15 December 2008 / Accepted: 4 February 2009 / Published online: 28 April 2009

Abstract
We present an experimental study of pattern formation in a Dielectric Barrier Discharge in Neon at 100 torr and 1 mm gap. An intensified CCD camera is used to analyze the time evolution of the patterns during one cycle of the voltage waveform. The formation of a hexagonal pattern of filaments in a transient, glow-like regime is observed, followed by a honeycomb structure that corresponds to a Townsend discharge occurring outside the regions delimited by the previous filaments. A 2D fluid model can qualitatively reproduce these features and is used to help interpreting the experimental results.

PACS
52.80.-s - Electric discharges.
89.75.Fb - Structures and organization in complex systems.
89.75.Kd - Patterns.
52.65.Kj - Magnetohydrodynamic and fluid equation.

© EDP Sciences 2009

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