Hannover 2020 – scientific programme

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P: Fachverband Plasmaphysik

P 5: Poster Session 1

P 5.37: Poster

Monday, March 9, 2020, 16:30–18:30, Empore Lichthof

On the influence of plasma parameters on particle size — •Sören Wohlfahrt, Niklas Kohlmann, Frank Wieben, Oguz Han Asnaz, Franko Greiner, and Dietmar Block — Institute of Experimental and Applied Physics, Kiel University, Germany

Microparticles are the essential component of a (dusty) complex plasma. The forces affecting these particles, as well as their accumulated charge, depend prominently on their size. Thus, a precise knowledge of the particle size is a key input parameter for a quantitative description and modelling. However, in interaction with the plasma the particle size can change. The size of particles can be determined with very high precision by means of angle- and polarisation-resolved light scattering (ARPLS), which is based on a comparison of experimental data with Lorentz-Mie theory [1]. We will present the size evolution of melamine-formaldehyde (MF) microparticles for various discharge conditions. Especially, variation of rf-power and neutral gas pressure and their effect on the particle size are discussed.

[1] N. Kohlmann, F. Wieben, O. H. Asnaz, D. Block, F. Greiner, Phys. Plasmas 26, 053701 (2019)