Mainz 2022 – scientific programme
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P: Fachverband Plasmaphysik
P 9: Poster I
P 9.47: Poster
Tuesday, March 29, 2022, 16:00–17:30, P
3-dimensional density distributions of NO in the effluent of a micro atmospheric pressure plasma jet operated in He/N2/O2 mixture and the influence of surfaces — •Patrick Preissing1, Ihor Korolov2, Julian Schulze2, Volker Schulz-von der Gathen1, and Marc Böke1 — 1Ruhr-Universität Bochum, Experimentalphysik II — 2Ruhr-Universität Bochum, Allgemeine Elektro- und Plasmatechnik
Plasma jets are known to generate a huge number of different reactive species. In that context Nitric Oxide (NO) is one of the key players, as it triggers many biological processes. In this study absolute ground state densities of NO are measured in the effluent of an RF-driven micro atmospheric pressure plasma jet (μAPPJ), that is operated in a He/N2/O2 mixture, by means of Laser Induced Fluorescence (LIF), with 3d spatial resolution. The densities are measured in two distinct atmospheres. In the first one, the jet is expanding into open air, whereas in the second configuration the jet is expanding into a controlled He/ synthetic air mixture. From the time resolved LIF signals the quenching coefficients for He, air, N2 and O2 are determined, as well as the intrusion of the ambient air into the He gas flow expanding from the jet. Parameter studies, varying different parameters such as plasma power, gas flow and gas mixture have been performed and the influence on the absolute NO densities as well as its distributions are investigated. Eventually the influence of surfaces in the effluent that interact with the reactive species is measured.