Hexagonal and honeycomb structures in Dielectric Barrier Discharges

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^{1, 2}

¹ 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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