Dispersion properties of dusty plasmas

U. De Angelis, R. Bingham, V. N. Tsytovich

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Abstract

The presence of charged dust particles in a plasma can change its dispersion properties. From the linear response of an equilibrium dusty plasma to the propagation of small perturbations, we find an average dielectric function є(ω, k) for the system in the case when the grain space distribution is random, and ensemble averages are taken over the random variables. For the case of high-frequency plasma waves, when ε ≈ 1-ω2p2 for the unperturbed case (cold plasma), we find that є becomes complex in the presence of the dust, leading to possible damping in a domain where Landau damping is usually negligible (ω » kVT).
Original languageEnglish
Pages (from-to)445-456
Number of pages12
JournalJournal of Plasma Physics
Volume42
Issue number3
DOIs
Publication statusPublished - Dec 1989

Keywords

  • charged particles
  • dielectric properties
  • mathematical techniques
  • perturbation techniques
  • dusty plasmas
  • Landau damping

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