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Author Prajapati, R. P. ♦ Bhakta, S. ♦ Chhajlani, R. K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ BOLTZMANN STATISTICS ♦ COLLISIONS ♦ DISPERSION RELATIONS ♦ DISTURBANCES ♦ DUSTS ♦ ELECTRONS ♦ GRAVITATIONAL COLLAPSE ♦ GRAVITATIONAL INSTABILITY ♦ IONS ♦ NEUTRAL PARTICLES ♦ NORMAL-MODE ANALYSIS ♦ PERTURBATION THEORY ♦ PLASMA ♦ POLARIZATION ♦ STRONG-COUPLING MODEL ♦ WAVE PROPAGATION ♦ WAVELENGTHS
Abstract The influence of dust-neutral collisions, polarization force, and electron radiative condensation is analysed on the Jeans (gravitational) instability of partially ionized strongly coupled dusty plasma (SCDP) using linear perturbation (normal mode) analysis. The Boltzmann distributed ions, dynamics of inertialess electrons, charged dust and neutral particles are considered. Using the plane wave solutions, a general dispersion relation is derived which is modified due to the presence of dust-neutral collisions, strong coupling effect, polarization force, electron radiative condensation, and Jeans dust/neutral frequencies. In the long wavelength perturbations, the Jeans instability criterion depends upon strong coupling effect, polarization interaction parameter, and thermal loss, but it is independent of dust-neutral collision frequency. The stability of the considered configuration is analysed using the Routh–Hurwitz criterion. The growth rates of Jeans instability are illustrated, and stabilizing influence of viscoelasticity and dust-neutral collision frequency while destabilizing effect of electron radiative condensation, polarization force, and Jeans dust-neutral frequency ratio is observed. This work is applied to understand the gravitational collapse of SCDP with dust-neutral collisions.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 23
Issue Number 5


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