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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.55: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Analysis of spatio-temporal ignition patterns in dielectric barrier discharges — •Cristian Flores, Hans Höft, Klaus-Dieter Weltmann, and Markus M. Becker — Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany
The occurrence of a repetitive spatio-temporal filament pattern in a dielectric barrier discharge (DBD) is analysed with a combined experimental, modelling, and equivalent circuit approach. The symmetric multi-filament DBD arrangement consists of two parallel tube electrodes (alumina-covered metal rods) separated by a 1 mm gas gap in synthetic air at atmospheric pressure. The system is driven by a high-voltage sinusoidal waveform with 11 kVpp at 10 kHz. Under these conditions, it is observed that the filaments ignite in two stages at alternating positions during each half-period. A fluid-Poisson model is used to study the dynamics of the DBD and to validate the estimations of the filament ignition times obtained from the equivalent electric circuit (EEC) in terms of the breakdown voltage, transferred charge, and an initial condition for the gap voltage. The validated expressions of the EEC model are then used to interpret the experimentally observed filament ignition patterns. The results suggest that a spatial variation in the gap voltage is responsible for the observed effects.
This work was funded by the Deutsche Forschungsgemeinschaft (DFG), project number: 535827833.
Keywords: Multi-filament dielectric barrier discharge; Atmospheric pressure; Equivalent electric circuit; Fluid-Poisson model