Perturbed soliton excitations of Rao-dust Alfvén waves in magnetized dusty plasmas

Journal Article · Fri Apr 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4945609· OSTI ID:22599176

Lavanya, C.; Senthil Kumar, V. ^[1]; Gopi, D. ^[2]; Pasqua, A. ^[3]

---

1. Department of Physics, Periyar University, Salem, Tamil Nadu 636 011 (India)
2. Department of Chemistry, Periyar University, Salem 636 011 (India)
3. Department of Physics, University of Trieste, Trieste (Italy)

We investigate the propagation dynamics of the perturbed soliton excitations in a three component fully ionized dusty magnetoplasma consisting of electrons, ions, and heavy charged dust particulates. We derive the governing equation of motion for the two dimensional Rao-dust magnetohydrodynamic (R-D-MHD) wave by employing the inertialess electron equation of motion, inertial ion equation of motion, the continuity equations in a plasma with immobile charged dust grains, together with the Maxwell's equations, by assuming quasi neutrality and neglecting the displacement current in Ampere's law. Furthermore, we assume the massive dust particles are practically immobile since we are interested in timescales much shorter than the dusty plasma period, thereby neglecting any damping of the modes due to the grain charge fluctuations. We invoke the reductive perturbation method to represent the governing dynamics by a perturbed cubic nonlinear Schrödinger (pCNLS) equation. We solve the pCNLS, along the lines of Kodama-Ablowitz multiple scale nonlinear perturbation technique and explored the R-D-MHD waves as solitary wave excitations in a magnetized dusty plasma. Since Alfvén waves play an important role in energy transport in driving field-aligned currents, particle acceleration and heating, solar flares, and the solar wind, this representation of R-D-MHD waves as soliton excitations may have extensive applications to study the lower part of the earth's ionosphere.

• OSTI ID: 22599176
• Journal Information: Physics of Plasmas, Vol. 23, Issue 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATION
CONTINUITY EQUATIONS
DISTURBANCES
DUSTS
ELECTRONS
EQUATIONS OF MOTION
EXCITATION
FLUCTUATIONS
IONOSPHERE
IONS
MAGNETOHYDRODYNAMICS
NONLINEAR PROBLEMS
PARTICULATES
PERTURBATION THEORY
PLASMA
SCHROEDINGER EQUATION
SOLAR FLARES
SOLAR WIND
TWO-DIMENSIONAL CALCULATIONS