Jena 2013 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 2: Komplexe und Staubige Plasmen I
P 2.3: Fachvortrag
Montag, 25. Februar 2013, 14:40–15:05, HS 2
Multi-scale simulation of strongly correlated dust particles in a partially ionized complex plasma — •Patrick Ludwig1, André Schella2, André Melzer2, and Michael Bonitz1 — 1Inst. für Theo. Phys. und Astrophysik, Universität Kiel — 2Institut für Physik, Universität Greifswald
This talk is devoted to a multi-scale simulation approach for strongly correlated dust clouds in a partially ionized complex plasma.
In order to correctly describe the complex interplay of the experimental parameters (a) pressure, (b) rf-power and (c) ion flow velocity on the self-organized particle arrangement, we have to go beyond a simple Yukawa approximation.
Our dynamical screening approach [1] provides the sound basis for a systematic exploration of the structural transition from a repulsive Yukawa-like particle-particle interaction at high pressure to a regime where plasma streaming leads to (i) fundamental structural changes, and (ii) to a wake-induced destabilization and melting of the highly correlated many-particle state.
Our theoretical results are systematically compared with recent experiments [2]. As an insightful tool for the detailed analysis of the multi-step transition between the liquid and solid phase we use the three-particle correlation function.
Ludwig et al., Plas. Phys. Contr. Fusion 54, 045011 (2012)
A. Schella et al., Phys. Rev. E 84, 056402 (2011)