Bremen 2017 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Dusty Plasmas II
P 17.4: Vortrag
Mittwoch, 15. März 2017, 09:40–09:55, HS 2010
In situ analysis of optically thick nanoparticle clouds — •Florian Kirchschlager1, Sebastian Groth2, Sebastian Wolf1, and Franko Greiner2 — 1Institute of Theoretical Physics and Astrophysics, Kiel, Germany — 2Institute of Experimental and Applied Physics, Kiel, Germany
In an argon-acetylene plasma nano-particles are grown.
Kinetic single-wavelength Mie ellipsometry allows one to constrain the size of these particles.
We find deviations between experimental measurements and numerical simulations based on single Mie-scattering. These deviations were previously assumed to result from multiple scattering in the plasma clouds.
We present 3D Monte-Carlo polarized radiative transfer simulations which allow us to calculate normalized Stokes vectors for dusty systems with arbitrary optical depth. With this approach it was possible for the first time to reproduce the experimental data. This technique has the potential to extend the existing diagnostic method for the in-situ analysis of the properties of nano-particles to systems where multiple scattering can not be neglected anymore.