Hannover 2020 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 2: Atmospheric-pressure plasma and applications 1

P 2.2: Vortrag

Montag, 9. März 2020, 11:30–11:45, b305

Time and space resolved electron dynamics in a microplasma channel — •Simon Kreuznacht, Sebastian Dzikowski, Marc Böke, and Volker Schulz-von der Gathen — Experimental Physics II, Ruhr University Bochum, Germany

Microplasma arrays have been under investigation for a long time. These are special dielectric barrier discharges at atmospheric pressure. It is possible to generate a homogeneous discharge with these microplasma arrays over a large area by the parallel operation of many identical cavities. The microplasma arrays are operated in Helium with a triangular voltage with a frequency of about 10 kHz and an amplitude of about 700 V. The microplasma channel, that will be presented here, represents a single cavity of the microplasma arrays. This channel provides optical access to the inside of the cavity from the top and unlike the microplasma arrays from the side. A fast gated, intensified CCD camera was used to investigate the discharge. Phase-resolved images, that were taken with line of sight from the top into the channel, showed that the discharges in the microplasma channel and the microplasma arrays behave similar. With phase-resolved images from the side it was possible to gain new insights into the time and space resolved electron dynamics of the discharge.