Linear and nonlinear dynamics of current-driven waves in dusty plasmas

Journal Article · Sat Sep 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4754282· OSTI ID:22086120

Ahmad, Ali ^[1]; Ali Shan, S; Haque, Q ^[1]; Saleem, H ^[1]

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1. National Centre for Physics (NCP), Shahdara Valley Road, 44000 Islamabad (Pakistan)

The linear and nonlinear dynamics of a recently proposed plasma mode of dusty plasma is studied using kappa distribution for electrons. This electrostatic wave can propagate in the plasma due to the sheared flow of electrons and ions parallel to the external magnetic field in the presence of stationary dust. The coupling of this wave with the usual drift wave and ion acoustic wave is investigated. D'Angelo's mode is also modified in the presence of superthermal electrons. In the nonlinear regime, the wave can give rise to dipolar vortex structures if the shear in flow is weaker and tripolar vortices if the flow has steeper gradient. The results have been applied to Saturn's magnetosphere corresponding to negatively charged dust grains. But the theoretical model is applicable for positively charged dust as well. This work will be useful for future observations and studies of dusty environments of planets and comets.

• OSTI ID: 22086120
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CURRENTS
DISTRIBUTION
DUSTS
ELECTRONS
ION ACOUSTIC WAVES
IONS
MAGNETIC FIELDS
NONLINEAR PROBLEMS
PLANETARY MAGNETOSPHERES
PLASMA
PLASMA DRIFT
SATURN PLANET
VORTICES
WAVE PROPAGATION