Augsburg 2006 – wissenschaftliches Programm
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P: Plasmaphysik
P 28: Astrophysikalische Plasmen; Dichte Plasmen 1; Schwerionen- und lasererzeugte Plasmen 2; Staubige Plasmen 4; Theorie 1
P 28.20: Poster
Mittwoch, 29. März 2006, 17:30–19:00, Flure
Molecular Dynamics simulations of screened Coulomb balls — •Volodymyr Golubnychiy1, Michael Bonitz1, Gerald Schubert2, and Holger Fehske2 — 1Institute of Theoretical Physics and Astrophysics, CAU-Kiel, Leibnizstrasse 15, 24098 Kiel, Germany — 2Institute of Physics, University of Greifswald, Domstr. 10a, D-17487 Greifswald, Germany
Molecular Dynamics and Langevin dynamics methods are applied to investigate mesoscopic systems of charged dust particles in a three-dimensional spherical parabolic confinement potential. Different types of dust-dust interactions are studied. We compare shell populations and shell radii with known theoretical models. Influence of screening effects on thermodynamical and geometrical properties are discussed. Known experimental results are also compared with numerical simulations [1]. It is shown that a model with statically screened dust-dust interaction and confinement which does not depend on screening gives the best agreement with the clusters, observed in Ref.[2].
[1] M. Bonitz. D. Block, O. Arp, V. Golubnychiy, H. Baumgartner, P. Ludwig, A. Piel and A. Filinov, submitted to Phys. Rev. Lett., preprint at ArXiv: physics/0508212
[2] O. Arp, D. Block, A. Melzer and A. Piel, Phys. Rev. Lett. 93 165004(2004)