Ion-acoustic waves in dusty plasmas

Details Ion-acoustic waves in dusty plasmas Ion-acoustic waves in dusty plasmas

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994p%26ss...42..507d&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 42, no. 6, p. 507-511

Physics

59

Cosmic Dust, Cosmic Plasma, Damping, Ion Acoustic Waves, Plasma Oscillations, Plasma-Particle Interactions, Wave Propagation, Cosmic Gases, Neutral Gases, Phase Shift

Scientific paper

The properties of ion-acoustic waves in steady-state, unmagnetized, dusty plasmas are analyzed using fluid equations. Two damping mechanisms are investigated. The 'Tromsoe damping' has been discussed in detail by researchers in Tromsoe (Havnes et al., (1992); Melandsoeet al., (1993) for dust-acoustic waves, and is related to the fact that a finite phase shift generally exists between the oscillation of the wave potential and the oscillation of the dust grains charge in the presence of the wave. The 'creation damping' is due to the continuous injection of fresh ions into the plasma, to replace those which are lost to the dust grains. These fresh ions, produced by ionization of a neutral gas, do not share initially in the wave motion of the pre-existing ions, and thus lower the average momentum of the ion population.

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