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P: Fachverband Plasmaphysik

P 16: Atmospheric Pressure Plasmas and their Applications III

P 16.6: Vortrag

Mittwoch, 28. Februar 2024, 15:30–15:45, WW 1: HS

Experimental observations on microsecond and nanosecond pulses applied to a surface dielectric barrier discharge — •Gerrit Hübner, Nils Schoeneweihs, Dominik Filla, Sebastian Wilczek, Thomas Mussenbrock, and Ihor Korolov — Ruhr-Universität Bochum

The conversion of volatile organic compounds (VOCs) has long been an area of interest in the plasma community. Surface dielectric barrier discharges (SDBD) have been used for such conversions, however the details behind the formation and behaviour of plasma streamers, typically observed in such discharges, are yet to be fully understood. This work focuses on investigation of a SDBD driven by microsecond and nanosecond pulses operated in mixtures of Helium and Nitrogen (or Oxygen). We use phase resolved optical emission spectroscopy (PROES) to study the spatio-temporal surface streamer dynamics on a nanosecond timescale. The quenching rates by He and N2 of the Helium-I 706 nm emission line are also determined from the measured effective lifetime. We have calculated and compared the streamer propagation speed for different discharge conditions. The experimental findings are compared with fluid (nonPDPSIM) simulations and a very good qualitative agreement is found providing a deep understanding of the streamer behaviour on the ns time scale. **This work is supported by the DFG via SFB1316 (A5)

Keywords: Surface dielectric varrier discharge; nanosecond pulses; PROES