Modulational instability of electromagnetic waves in highly collisional dusty plasmas

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:232835

Vladimirov, S V ^[1]; Shukla, P K ^[2]

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1. Kyushu Univ., Fukuoka (Japan)
2. Ruhr-Universitaet Bochum (Germany)

Recently, there has been a great deal of interest in studying the physics of dusty plasmas, which have a number of applications in astrophysical and space plasmas, in the earth`s environment, as well as in laboratory and several technologies (e.g., HF plasma etching). Dusty plasmas are characterized as a low-temperature ionized gas whose constituents are electrons, ions and extremely massive micron-sized dust particulates. The latter are usually negatively charged due to the attachment of the background plasma electrons on the surface of the dust grains via collisions. Collective processes in dusty plasmas are supposed to play a very important role. In the presence of perturbations, the plasma currents that reach the surface of the grains are oscillatory. Thus, the effects of dust charge fluctuations have to be incorporated in the study of any wave phenomena. The influence is especially strong for low-frequency waves with frequencies much less than the so-called charging frequency. In this paper, we present an investigation of stimulated scattering of a large amplitude electromagnetic wave off plasma slow motions incorporating the effects of dust charge perturbations in an unmagnetized dusty plasma. Specifically, we focus our attention on the modulational instability of a high-frequency electromagnetic wave in highly collisional dusty plasmas.

• OSTI ID: 232835
• Report Number(s): CONF-950749--; CNN: Contract CHRX-CT94-062
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BEAM-PLASMA SYSTEMS
COLLISIONAL PLASMA
ELECTROMAGNETIC RADIATION
PLASMA INSTABILITY
SCATTERING
WAVE PROPAGATION