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P: Fachverband Plasmaphysik

P 7: Poster Session - Dusty Plasmas

P 7.12: Poster

Monday, March 2, 2015, 16:30–18:30, Foyer Audimax

Influence of non-Maxwellian ions on the dust potential in a flowing magnetized plasma — •Jan-Philip Joost, Patrick Ludwig, Hanno Kählert, and Michael Bonitz — Christian-Albrechts-Universität zu Kiel, ITAP

The potential of a dust particle in a complex plasma is computed from a dielectric function, which takes ion acceleration by an external electric field explicitly into account, thereby leading to a non-Maxwellian velocity distribution [1]. We consider the case of a non-magnetized plasma as well as the situation where a magnetic field is aligned with the ion flow. In comparison with previous results based on a shifted Maxwellian ion velocity distribution [2], we find that only one positive peak behind the dust grain exists while the rest of the wake potential is largely suppressed.
A. V. Ivlev, S. K. Zhdanov, S. A. Khrapak, and G. E. Morfill, Phys. Rev. E 71, 016405 (2005)
J.-P. Joost et al., Plasma Phys. Control. Fusion 57, 025004 (2015)