Novosibirsk, Russia, May, 30 – June, 4, 2011

International Conference
"Modern Problems of Applied Mathematics and Mechanics: Theory, Experiment and Applications", devoted to the 90th anniversary of professor Nikolai N. Yanenko

Abdrashitov A.V.   Zolnikov K.P.   Psakhie S.G.  

Dust plasma crystals in confinement field of different configuration

Reporter: Zolnikov K.P.

Molecular dynamics simulation of the dependency dust plasma cluster structure on confinement field anisotropy was carried out. The interaction between dust particles was described on the base of Debye-Huckel potential. The results showed that confinement field anisotropy greatly affects shape and structure of dust plasma clusters. The single-component dust plasma cluster represented a Coulomb ball with a typical shell structure in the ground state in the spherically symmetric confinement field. The simulated system tended to the transition from a bulk to plane shape at the decrease of the horizontal confinement field component to compare with vertical one. At the same time the simulated system tended to the transition from the plane to bulk shape and formation of the shell structure in the ground state at the increase of the dust particle number.
The structure of the bicomponent dust plasma cluster in anisotropic confinement field had a few peculiarities: particles of different sorts were segregated by height due to size and charge differences; volumes occupied by particles of different sorts were divided by “forbidden zone”; structure of the bicomponent dust plasma cluster was symmetric with respect to the center of the ”forbidden zone”.
The work was supported by RAS Scientific Program “Thermal physics and mechanics of extreme energetic interactions and physics of strongly compressed matter”.

Abstracts file: Abdrashitov_abstract.doc
Full text file: Zolnikov.pdf


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