Jena 2013 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 9: Komplexe und Staubige Plasmen II

P 9.1: Hauptvortrag

Mittwoch, 27. Februar 2013, 14:00–14:30, HS 3

Waves and normal modes in magnetized strongly correlated plasmas — •Hanno Kählert¹, Torben Ott², Jan Carstensen³, Alexi Reynolds⁴, Michael Bonitz⁵, Gabor J. Kalman¹, Hartmut Löwen², Franko Greiner³, and Alexander Piel³ — ¹Boston College, USA — ²HHU Düsseldorf — ³CAU Kiel, IEAP — ⁴University of Birmingham, UK — ⁵CAU Kiel, ITAP

Studying the dynamics of magnetized strongly coupled plasmas is a challenging problem for both theory and experiment. We investigate the wave spectrum of the magnetized strongly coupled one-component plasma theoretically using a combination of the quasi-localized charge approximation (QLCA) and molecular dynamics simulations [1]. The principal waves are well described by the QLCA, which, however, is unable to predict the additional high-frequency excitations found in the simulations. We further explore the transition from parallel to perpendicular wave propagation within the QLCA. A strong effective magnetization of the dust particles in a complex plasma is achieved by exploiting the equivalence between the Lorentz force and the Coriolis force (Larmor’s theorem) and setting the dust particles into controlled rotation [2]. In principle, this can be accomplished by angular momentum transfer from a rotating neutral gas column. The Coriolis force replaces the Lorentz force in the rotating frame and allows us to study the normal modes of a highly “magnetized” dust cluster.
T. Ott et al., PRL 108, 255002 (2012); H. Kählert et al., submitted
H. Kählert et al., PRL 109, 155003 (2012); M. Bonitz et al., PSST 22, 015007 (2012)