Kiel 2011 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

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

P 18.13: Poster

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

Modeling Laser Manipulation of 2D Yukawa Clusters — •Hauke Thomsen, Hanno Kählert, and Michael Bonitz — Christian-Albrechts Universität zu Kiel

The ability to influence the spatial structure and the velocity distribution of two-dimensional trapped Yukawa clusters by lasers has been exploited in different experiments in order to analyze melting effects[1,2]. We present results of Langevin Molecular Dynamic simulations which allow to model these processes in detail.

The goal is to get a better understanding of how the additional time dependent force affects on the particles dynamics. Not only the absolute laser power is important for the cluster manipulation, but also the scanned pattern plays a mayor role as well the scanning speed. Depending on the scanning parameters the laser can either cause heating or provide a quasi-static force field. Often, even small changes in the simulation parameters result in major changes in the clusters' behavior.

[1] M. Wolter and A. Melzer, Phys. Rev. E 71, 036414 (2005)

[2] J. Schablinski, Kontrolle von Struktur und Dynamik finiter Plasmakristalle mittels Lasermanipulation, Diplomarbeit, CAU Kiel (2010)