Nonlinear dispersive Alfven waves in dusty plasma in the transition limit, {alpha}{approx}1

Journal Article · Sat Oct 15 04:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3644482· OSTI ID:22047013

Sah, O P ^[1]

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1. Department of Physics, Birjhora Mahavidyalaya, Pancha-Swahid Path, Bongaigaon 783 380, Assam (India)

Localized nonlinear structures associated with dispersive Alfven waves are investigated in dusty plasma in the transition limit, i.e., {alpha}{identical_to}({beta}/2Q){approx}1, where {beta} is the ratio of thermal to magnetic pressure and Q is electron to ion mass ratio. Sagdeev pseudopotential is obtained from the basic governing equations, which is then numerically solved to study the existence and the behaviors of the nonlinear structures. It is found that both compressive and rarefactive solitons can coexist above and below certain critical {alpha}- values determined by the wave direction cosine (K{sub Z}) and the Mach number (M); and the compressive (rarefactive) solitons are much wider than the rarefactive ones for the case MK{sub Z}). In addition, the rarefactive solitons are found to be converted into rarefactive double layers, for the case M>K{sub Z}, if the dust grains are negatively charged and their density exceeds certain critical value.

• OSTI ID: 22047013
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
DUSTS
ELECTRONS
IONS
LAYERS
MACH NUMBER
MASS
NONLINEAR PROBLEMS
PLASMA
PLASMA SHEATH
POTENTIALS
SOLITONS