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P: Fachverband Plasmaphysik

P 6: Invited talks II

P 6.1: Hauptvortrag

Dienstag, 29. März 2022, 11:00–11:30, P-H11

Laser diagnostics on atmospheric pressure plasmas: From basic to fancy — •Volker Schulz-von der Gathen and the CRC 1316 team — Ruhr-University Bochum, Bochum, Germany

Atmospheric pressure plasmas are one of the main research topics of the CRC 1316 ’Transient atmospheric pressure plasmas: From plasmas to liquids to solids’. An overlaying goals is to understand the interaction of plasmas and species either in gas or liquid form to improve e.g. plasma catalysis or in plasma medical applications. Due to the atmospheric pressure condition most of the investigated plasmas are in the mm or even sub-mm dimensions or show strongly transient behaviour. This covers micro discharges in cavities of only 100 µm dimension to pulsed ns devices in pure noble gases or with more complex molecular admixtures. This poses challenges for many diagnostics. Here we describe a set of laser diagnostics applied allowing for enough spatial and temporal resolution to yield information on the dynamics of species, fields or population densities in some exemplary jet devices. By this we cover schemes from nowadays standard techniques to examples of only recently introduced ones. We will exemplarily discuss some of the advantages and drawbacks for the various schemes involved in particular at atmospheric pressure.