Ion-acoustic vortices in inhomogeneous and dissipative electron-positron-ion quantum magnetoplasmas

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3112707· OSTI ID:21276987

Masood, W; Mirza, Arshad M ^[1]; Nargis, Shahida; Ayub, M ^[2]

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1. Theoretical Plasma Physics Division, Pinstech, P. O. Nilore, Islamabad 54000 (Pakistan)
2. Department of Mathematics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)

Linear and nonlinear properties of quantum ion-acoustic waves are studied in a nonuniform, dissipative quantum plasma (composed of electrons, positrons, and ions) with sheared ion flow parallel to the ambient magnetic field, using the quantum hydrodynamic model. It is shown that the shear ion flow parallel to the external magnetic field can drive the quantum ion-acoustic wave unstable provided |S|k{sub y}>k{sub z}. Stationary solutions of the nonlinear equations that govern the quantum ion-acoustic waves are also obtained. It is found that electrostatic monopolar, dipolar, and vortex street-type solutions can appear in such a plasma. It is observed that the inclusion of positron, quantum statistical, and Bohm potential terms significantly modifies the scale lengths of these nonlinear structures. The relevance of the present investigation with regard to the dense astrophysical environments is also pointed out.

• OSTI ID: 21276987
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRONS
HYDRODYNAMIC MODEL
ION ACOUSTIC WAVES
IONS
MAGNETIC FIELDS
NONLINEAR PROBLEMS
POSITRONS
QUANTUM PLASMA
VORTICES