SMuK 2023 – scientific programme

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P: Fachverband Plasmaphysik

P 12: Poster II

P 12.1: Poster

Wednesday, March 22, 2023, 17:30–19:00, HSZ EG

Laser-induced charge ablation in surface DBD — •Robin Labenski, David Steuer, Henrik van Impel, Volker Schulz-von der Gathen, Marc Böke, and Judith Golda — Ruhr-University Bochum, D-44801 Bochum, Germany

In the emerging field of plasma catalysis, atmospheric pressure plasmas turned out to be promising candidates. Especially micro cavity plasma arrays allow for fundamental investigation of the interaction between the plasma and catalytic surfaces. As this reactor is a surface DBD, the used dielectric (e.g., catalyst) plays a crucial role in its discharge behavior since it can be charged during ignition. To visualize these charges and investigate their impact on catalysis, the array (15kHz, 400-800V) is irradiated using a nanosecond Nd:YAG-laser (20Hz, 532nm/1064nm) to ablate the charges during/after ignition. The impact of the laser is detected using global (and eventually local) electrical measurements as well as optical emission spectroscopy. While global electrical measurements involve current and charge measurements (i.e., Lissajous- figures), local measurements are planned to be performed using a Picoamperemeter directly picking up the ablated charges. Measurements show a lower/higher ignition voltage in the consecutive (half-) cycle and a decrease of charge in the Lissajous-figure immediately after laser irradiation.
This work is supported by the DFG via SFB 1316 (project A6).