München 2019 – scientific programme

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.49: Poster

Thursday, March 21, 2019, 16:30–18:30, Foyer Audimax

Reproducibility of core-discharge parameters in the 'COST Reference Microplasma Jet' — •Patrick Preissing, David Steuer, Volker Schulz-von der Gathen, and Marc Böke — Experimental Physics II, Ruhr-University Bochum

Cold atmospheric pressure plasmas (CAPs) have gained intense attraction over the last few years. CAPs provide great properties for applications such as for activation of surfaces, etching, coating and many more. It has been shown that atomic oxygen plays a major role for interaction. However, the sources, especially parameter correlations of CAPs were poorly characterized and results from different devices were only hardly comparable. In this context a robust stable micro RF reference atmospheric pressure plasma jet (mAPPJ) was developed with a high degree of reproducibility. This device is referred to as the COST-Jet. Here, the reproducibility concerning current voltage characteristics is evaluated with an integrated current voltage probe in the jet, constantly recording these key quantities. The 1d spatial distribution of atomic oxygen along the discharge core, as well as a power and O2 admixture variation is then measured via passive optical emission spectroscopy, namely actinometry. The results are compared to absolute densities measured earlier by active Two Photon Absorption Laser Induced Fluorescence spectroscopy (TALIF). The measurements are performed within the framework of the B2 project of the SFB1316 'Transient Atmospheric Pressure Plasmas: from plasmas to liquids to solids'.