https://doi.org/10.1051/epjap/2009082
Hexagonal and honeycomb structures in Dielectric Barrier Discharges
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
Corresponding author: benoit.bernecker@laplace.univ-tlse.fr
Received:
15
December
2008
Accepted:
4
February
2009
Published online:
28
April
2009
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
