München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.25: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Characterization of filamentary instabilities in a magnetized RF discharge — •Tim Donders¹, Hendrik Jung², and Franko Greiner² — ¹Elementary Processes in Gas Discharges, Faculty of Applied Physics, Technische Universiteit Eindhoven, The Netherlands — ²Institute of Experimental and Applied Physics, Kiel University, Germany

Magnetized plasmas in a planar radio frequency capacitively coupled discharge system show filaments, tube-like regions of hotter and/or denser plasma along the magnetic field. The diameter of the filaments depends strongly on the absolute value of the magnetic induction. We investigate the interplay of filaments with a nanodust cloud for different magnetic inductions. This provides information on the dust confinement in a magnetized plasma and the nanoparticles can be used as tracers for the visualization and analysis of the filamentary instabilities. Given that the filaments preferably occur at facing electrode surface, switching towards a hollow electrode design helps to prevent the formation of filaments. In this configuration, stable nanodusty clouds can be grown in a magnetic field with a strength of up to 4 T