Structural features of bicomponent dust Coulomb balls formed by the superposition of fields of different origin in plasma

S. G. Psakhie, K. P. Zolnikov, L. F. Skorentsev, D. S. Kryzhevich, A. V. Abdrashitov

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Abstract

A binary mixture of dust particles in plasma which are in an external electrostatic harmonic confining field as well as in the field consisting of gravitational, thermophoretic, and electrostatic force is simulated. The interparticle interaction is described by the Yukawa isotropic pair potential. The structural properties of the binary mixture of particles depending on composition are investigated. The segregation features of a system of particles of two species under the conditions of recent experiments on Coulomb ball formation are studied. It is shown that particles form a shell structure in which every shell contains only its own species of particles; in so doing, smaller-sized particles make up outer shells with respect to larger-sized particles. When the size difference between the particles becomes more and more pronounced, they are spatially separated up to the formation of two independent Coulomb balls.

Original languageEnglish
Article number053701
JournalPhysics of Plasmas
Volume15
Issue number5
DOIs
Publication statusPublished - 9 Jun 2008

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Psakhie, S. G., Zolnikov, K. P., Skorentsev, L. F., Kryzhevich, D. S., & Abdrashitov, A. V. (2008). Structural features of bicomponent dust Coulomb balls formed by the superposition of fields of different origin in plasma. Physics of Plasmas, 15(5), [053701]. https://doi.org/10.1063/1.2912447