Berlin 2014 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 10: Dusty Plasmas II

P 10.1: Hauptvortrag

Dienstag, 18. März 2014, 14:00–14:30, SPA HS201

Multiscale simulation of dust clusters in a strongly magnetized flowing plasma — •Patrick Ludwig¹, Hanno Kählert¹, Jan-Philip Joost¹, Christopher Arran², and Michael Bonitz¹ — ¹ITAP, Universität Kiel — ²Emmanuel College, Cambridge, UK

A key problem in the description of non-ideal, multi-component plasmas is the drastic difference in the characteristic length and time scales of the different particle species. This challenging multiscale problem inherent to studying streaming complex plasmas can efficiently be tackled by a statistical, linear-response ansatz for the light plasma constituents in combination with first-principle Langevin dynamics simulations of the heavy and strongly correlated dust component [1]. Of crucial importance in this scheme is the quality of the dynamically screened Coulomb potential [2]. Using the dielectric function for a partially ionized flowing magnetized plasma results are presented for the wakefield around a single dust grain and for multiscale simulations of a correlated ensemble of grains revealing fundamental structural changes when wake effects and an external magnetic field come into play.

This work is supported by the DFG via SFB-TR24, projects A7 and A9 and by the DAAD RISE program.

[1] P. Ludwig et al., PPCF 54, 045011 (2012), [2] P. Ludwig et al., New J. Phys. 14, 053016 (2012), [3] P. Ludwig, C. Arran, and M. Bonitz, "Introduction to Streaming Complex Plasmas B: Theoretical Description of Wake Effects", in: "Complex Plasmas: Scientific Challenges and Technological Opportunities", M. Bonitz, K. Becker, J. Lopez and H. Thomsen [Eds.], Springer (2014)