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Role of stochastic fluctuations in the charge on macroscopic particles in dusty plasmas

  • O. S. Vaulina
  • A. P. Nefedov
  • O. F. Petrov
  • S. A. Khrapak
Plasma, Gases

Abstract

The currents which charge a macroscopic particle placed in a plasma consist of discrete charges; hence, the charge can undergo random fluctuations about its equilibrium value. These random fluctuations can be described by a simple model which, if the mechanisms for charging of macroscopic particles are known, makes it possible to determine the dependence of the temporal and amplitude characteristics of the fluctuations on the plasma parameters. This model can be used to study the effect of charge fluctuations on the dynamics of the macroscopic particles. The case of so-called plasma-dust crystals (i.e., highly ordered structures which develop because of strong interactions among macroscopic particles) in laboratory gaseous discharge plasmas is considered as an example. The molecular dynamics method shows that, under certain conditions, random fluctuations in the charge can effectively heat a system of macroscopic particles, thereby impeding the ordering process.

Keywords

Field Theory Molecular Dynamic Elementary Particle Simple Model Quantum Field Theory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© American Institute of Physics 1999

Authors and Affiliations

  • O. S. Vaulina
    • 1
  • A. P. Nefedov
    • 1
  • O. F. Petrov
    • 1
  • S. A. Khrapak
    • 1
  1. 1.Scientific-Research Center for Thermal Physics and Pulsed InteractionsRussian Academy of SciencesMoscowRussia

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