Erlangen 2026 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 12: Atmospheric Pressure Plasmas I
P 12.3: Vortrag
Mittwoch, 18. März 2026, 14:30–14:45, KH 01.020
Spatio-temporal development of pulsed-driven dielectric barrier discharges in a single-filament arrangement in Ar — •Hans Höft1, Alica Takáčová2, Tomáš Hoder1,2, and Markus M. Becker1 — 1Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany — 2Department of Plasma Physics and Technology, Masaryk University, Brno, Czech Republic
Dielectric barrier discharges (DBDs) in argon were investigated using a double-sided, symmetric single-filament configuration with 0.5 mm alumina barriers and a 1 mm gas gap, which was housed in a Plexiglas cell and was flushed with a 100 sccm Ar flow at atmospheric pressure.
The DBDs were driven by unipolar positive high-voltage pulses (50 ns rise/fall time, 10 kHz repetition frequency, 1 µs pulse width) with a varying amplitude (2.1–3.0 kV).
Imaging by synchronised iCCD and streak camera measurements combined with fast electrical probes revealed a reproducible, thin constricted channel and surface discharges on both dielectrics.
The discharge inception at the rising slope features as a cathode-directed streamer followed by a transient glow phase with complex characteristics; the streamer velocity was an order of magnitude lower than in air-like gas mixtures.
Increasing the amplitude to 3.0 kV significantly altered the discharge inception and development compared to 2.1 kV, thus providing valuable data for modelling DBDs in Ar.
This work is funded by the Deutsche Forschungsgemeinschaft (DFG) – project number 504701852, and project LM2023039 funded by the Ministry of Education, Youth and Sports of the Czech Republic.
Keywords: Single-filament dielectric barrier discharge; Electrical and Optical Diagnostics; Atmospheric pressure; Argon