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Hexagonal and honeycomb structures in Dielectric Barrier Discharges

Published online by Cambridge University Press:  28 April 2009

B. Bernecker ,
T. Callegari ,
S. Blanco ,
R. Fournier  and
J. P. Boeuf
B. Bernecker*
Affiliation:
Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d'Énergie, 118 route de Narbonne, 31062 Toulouse Cedex 9, France CNRS LAPLACE, 31062 Toulouse, France
T. Callegari
Affiliation:
Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d'Énergie, 118 route de Narbonne, 31062 Toulouse Cedex 9, France CNRS LAPLACE, 31062 Toulouse, France
S. Blanco
Affiliation:
Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d'Énergie, 118 route de Narbonne, 31062 Toulouse Cedex 9, France CNRS LAPLACE, 31062 Toulouse, France
R. Fournier
Affiliation:
Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d'Énergie, 118 route de Narbonne, 31062 Toulouse Cedex 9, France CNRS LAPLACE, 31062 Toulouse, France
J. P. Boeuf
Affiliation:
Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d'Énergie, 118 route de Narbonne, 31062 Toulouse Cedex 9, France CNRS LAPLACE, 31062 Toulouse, France
*
benoit.bernecker@laplace.univ-tlse.fr
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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.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 47 , Issue 2: 11th International Symposium on High Pressure, Low Temperature Plasma Chemistry (HAKONE XI) , August 2009 , 22808
Copyright
© EDP Sciences, 2009

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