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Electric field dynamics at charged point in two component plasma

Author

Listed:
  • M. Meftah
  • T. Chohra
  • H. Bouguettaia
  • F. Khelfaoui
  • B. Talin
  • A. Calisti
  • J. Dufty

Abstract

The autocorrelation function for the velocity and for the electric microfield of an impurity ion in a Two Ionic Component Plasma (TICP) is considered. A simple model is constructed for this purpose that preserves the exact short time dynamics and the long time global constraint of a given self-diffusion coefficient. The memory function and then the collision effects associated with the correlation function for the self-diffusion are expressed in terms of an effective two body interaction via a screened effective potential. The basic approximation used in our approach is the “disconnected” one that refers to the collision operator. A comparison of the prediction of this model for the self-diffusion and for the autocorrelation functions with the results of the molecular dynamics simulation developed in our laboratory (PIIM) shows an acceptable agreement over a wide range of plasma coupling, impurity ion charge and concentration. Copyright EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2004

Suggested Citation

  • M. Meftah & T. Chohra & H. Bouguettaia & F. Khelfaoui & B. Talin & A. Calisti & J. Dufty, 2004. "Electric field dynamics at charged point in two component plasma," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 37(1), pages 39-46, January.
    • Handle: RePEc:spr:eurphb:v:37:y:2004:i:1:p:39-46:10.1140/epjb/e2004-00028-x
    DOI: 10.1140/epjb/e2004-00028-x
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