Greifswald 2024 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 10: Atmospheric Pressure Plasmas and their Applications II
P 10.2: Vortrag
Dienstag, 27. Februar 2024, 14:30–14:45, WW 1: HS
Electric field components within a micro scaled dielectric barrier discharge measured by Stark shift and splitting of helium lines — •Henrik van Impel, David Steuer, Robin Labenski, Volker Schulz-von der Gathen, Marc Böke, and Judith Golda — PIP & EP2, Ruhr-University Bochum, D-44801 Bochum
Atmospheric pressure dielectric barrier discharges (DBDs), such as the micro cavity plasma array (MCPA) [1], have emerged as promising technologies for the conversion of volatile gases. These conversion processes’ effectiveness can be enhanced by integrating catalytically active surfaces. To deepen the understanding of the plasma-catalyst interaction, it is crucial to investigate the transport dynamics of reactive species to the catalytic surface. The transport is in particular affected by the electric field perpendicular to the catalytic surface. However, experimental data on the component-wise electric field strength within DBDs are rare. To address this issue, we performed polarized optical emission spectroscopy on the shifting and splitting of the allowed 492.19 nm (1D→1P0) and forbidden 492.06 nm (1F0→1P0) helium line pair. This diagnostic approach requires a non-radially symmetric geometry, which leads to an adapted reactor design of the MCPA allowing the side-on observation of the discharge. The discharge operates in pure helium at atmospheric pressure, utilizing a triangular excitation voltage with a frequency of 15 kHz and an amplitude of 600 V. Field components reveal differences of approximately 5 kV cm−1 or 20 %. The project is funded within project A6 of the SFB 1316.
[1] Dzikowski et al 2020 Plasma Sources Sci. Technol. 29 035028
Keywords: Electric field components; DBD; Atmospheric pressure; Optical Emission Spectroscopy