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P: Fachverband Plasmaphysik

P 9: Poster I

P 9.36: Poster

Dienstag, 29. März 2022, 16:00–17:30, P

Analysis of phase separation processes in dusty plasmas using a polarization camera — •Andre Melzer, Daniel Maier, and Stefan Schütt — Institute of Physics, University Greifswald

Binary dust mixtures provide an interesting system to study fundamental processes such as phase separation. There, two dust species of different sizes are trapped in the plasma of an rf discharge under microgravity conditions. These two species demix due to the difference in the forces exerted by the plasma on the differently sized particles, even if the size disparity is very small. So far, in these experiments, one of the two species has been marked by a fluorescent dye to distinguish between the species.

In a recent set of experiments, a camera equipped with a pixel-wise polarization filter is used to check whether the polarization-dependent scattering can be used to identify the two different species. Here, demixing processes under microgravity conditions are analyzed from the polarization camera data and compared with the information from the fluorescence technique.