Kiel 2011 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Poster: Theorie/Simulation dichter und stark gekoppelter Plasmen

P 18.14: Poster

Mittwoch, 30. März 2011, 16:30–18:30, Foyer

Collective excitations of a spherically confined Yukawa plasma — •Hanno Kählert and Michael Bonitz — ITAP, Christian-Albrechts Universität zu Kiel

We compare the results of a recently developed fluid theory for the multipole modes of a Yukawa plasma in a spherical confinement [1] with molecular dynamics (MD) simulations [2]. The simulations confirm the existence of high order modes found in cold fluid theory. The eigenfrequencies are in close agreement with the theory for weak to moderate screening and low order modes. We discuss the influence of screening, coupling and friction on the mode spectra. Further, we examine the relations between the breathing mode in the fluid theory, the MD simulation and the respective crystal eigenmode in more detail.

[1] H. Kählert and M. Bonitz, Phys. Rev. E 82, 036407 (2010)

[2] H. Kählert and M. Bonitz, arXiv:1011.5849 (2010)