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Is dust acoustic wave a new plasma acoustic mode?
In this Brief Communication, the claim of the novelty of the dust acoustic wave in a dusty plasma within the constant dust charge model is questioned. Conceptual lacunas behind the claim have been hig...

Ionization instability in dusty plasmas

Phys. Plasmas 4, 3422 (1997); doi:10.1063/1.872484

Issue Date: September 1997

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N. D'Angelo
Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242
The ionization instability in a dusty plasma in which the neutral gas is ionized by a constant flux of energetic electrons with energy slightly above the ionization energy is examined by using fluid equations for the three charged components, namely positive ions, electrons, and negatively charged dust grains. The presence of negatively charged dust increases both the frequency and the growth rate of the IA (ion-acoustic) wave excited through the ionization instability. The DA (dust-acoustic) mode, even in the absence of ion–neutral collisions, ion viscosity, and neutral gas drag on the dust grains, is always damped within the parameter ranges explored here and relevant to laboratory plasmas. The present results on the DA wave excitation are at variance with results obtained by Shukla and Morfill [Phys. Lett. A 216, 153 (1996)]. ©1997 American Institute of Physics.
History: Received 20 February 1997; accepted 29 May 1997
Permalink: http://link.aip.org/link/?PHPAEN/4/3422/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.35.Qz
    Physics of plasmas and electric discharges Waves, oscillations, and instabilities in plasma Plasma microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.)
  • 52.25.Vy
    Physics of plasmas and electric discharges Plasma properties Impurities in plasmas
  • 52.25.Wz
    Physics of plasmas and electric discharges Plasma properties Nonneutral plasmas
  • 52.35.Fp
    Physics of plasmas and electric discharges Waves, oscillations, and instabilities in plasma Electrostatic waves and oscillations (e.g., ion-acoustic waves)
  • 52.20.Hv
    Physics of plasmas and electric discharges Elementary processes in plasma Atomic, molecular, ion, and heavy-particle collisions
  • YEAR: 1996-97

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PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
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REFERENCES (14)
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