Hannover 2020 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 16: Poster Session 3

P 16.30: Poster

Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof

Scattering and absorption diagnostics for nanodusty plasmas — •Harald Krüger and André Melzer — Institute of Physics, University Greifswald

Dusty plasmas with nanoparticles have drawn increased attention in the last few years. Beside the existing experimental setups with nanoparticles grown in the rf discharge, we present the insertion of industrial, nanoscaled dust with a gas jet injection setup.

The confined particles are investigated in terms of size and density distribution by a Mie scattering and absorption spectroscopy setup.

For the determination of the size the angular resolved scattering intensity for perpendicular und parallel polarized incident laser light is recorded. Two different approaches to calculate the resulting size of the particles and their challenges will be discussed.

Simultaneous to the size measurement, particle density measurements have been carried out. Here, the absorption of a broadband light source in the visible spectrum is recorded. Using an Abel inversion algorithm, the spatially resolved particle density distribution can be calculated.