Effects of suprathermal particles on the dust ion-acoustic waves in a complex plasma

Dust ion-acoustic waves propagating in a complex plasma containing dusty particles and suprathermal electrons and ions are kinetically analyzed. The suprathermal particles are effectively modeled by the Lorentzian (kappa) velocity distribution function. For a collisionless and unmagnetized plasma, t...

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Bibliographic Details
Published in:Current applied physics 2010, 10(5), , pp.1340-1344
Main Author: Lee, Myoung-Jae
Format: Article
Language:English
Subjects:
Complex plasma
Damping
Density ratio
Dispersions
Dust
Dust ion-acoustic wave
Landau damping
Plasma (physics)
Spectra
Superthermal plasma
Suprathermal plasma
Wavelengths
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Summary:Dust ion-acoustic waves propagating in a complex plasma containing dusty particles and suprathermal electrons and ions are kinetically analyzed. The suprathermal particles are effectively modeled by the Lorentzian (kappa) velocity distribution function. For a collisionless and unmagnetized plasma, the full spectrum of the dispersion relation is obtained and the suprathermal particle effects on the wave frequency and the Landau damping are investigated. For a given wave number, the wave frequency decreases as the spectral index κ decreases, especially very rapidly in the low κ region. The Landau damping of the wave and its maximum are derived. They are found to be enhanced by the increase of suprathermal particles. The ion-to-electron density ratio also enhances the damping rate greatly.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2010.04.005