Interaction of current filaments in dielectric barrier discharges with relation to surface charge distributions

Abstract

Abstract. In a planar, laterally extended dielectric barrier discharge (DBD) system operated in glow mode, a filamentary discharge is observed. The filaments tend to move laterally and hence tend to cause collisions. Thereby, usually one collision partner becomes destroyed. In this paper, the collision process and especially the preceding time period is investigated. Beside the luminescence density of the filaments, the surface charge density accumulated between the single breakdowns of the DBD is observed via an optical measurement technique based on the linear electro-optical effect (pockels effect). A ring-like substructure of the surface charge distribution of a single filament is found, which correlates to the filament interaction behaviour. Furthermore, a preferred filament distance is found, suggesting the formation of a filamentary quasi-molecule.

Breakdown of order in a self-organised barrier discharge

“…Different experiments indicate that the filament interaction is best described by a particle-like approach, i.e. the interaction takes place on the basis of direct neighbourhood [18,19], especially in the regime of loose filament arrangements [11]. This results in a strong local order but does not enforce a long-range order.…”

“…The same lower limit for the distance of neighbouring filaments is also responsible for the nearly vanishing abundance at small angles. Physically, the lowest filament distance is determined by the inhibition of ignition in the vicinity of a filament [17,18]. Hence, the minimal filament distance is independent from the hexagonal pattern, and so the low abundance for small distances and small angles stays stable after the pattern breakdown (Fig.…”

Dynamic potential distributions of surface discharge in silicone gel

“…The outline of Pockels sensing technique is described in former reports [14][15][16][17]. The relation between incident light intensity I in and detected light intensity I out is given by…”

Temporal symmetry of individual filaments in different spatial symmetry filaments pattern in a dielectric barrier discharge

“…Pattern formation is a widespread phenomenon which can take place in nonlinear dissipative systems such as the Rayleigh-Bénard convection system, 1 Faraday system, 2-4 reaction-diffusion system, 5 dielectric barrier discharge ͑DBD͒ system, [6][7][8][9][10][11][12] and so on. Patterns in many of these systems result from the interaction of discrete individuals.…”