Oblique modulation of ion-acoustic waves and envelope solitons in electron-positron-ion plasma

Journal Article · Mon Jun 15 04:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3142473· OSTI ID:21277220

Jehan, Nusrat ^[1]; Salahuddin, M ^[2]; Mirza, Arshad M ^[1]

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1. Department of Physics, Theoretical Plasma Physics Group, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
2. Pakistan Atomic Energy Commission, P.O. Box 1114, Islamabad 44000 (Pakistan)

The effect of oblique modulation on the amplitude dynamics of ion-acoustic wave propagating in a collisionless electron-positron-ion plasma is investigated. Using Krylov-Bogoliubov-Mitropolsky (KBM) perturbation method, a nonlinear Schroedinger (NLS) equation is derived which governs the evolution of obliquely modulated ion-acoustic envelope excitations. It is found that the presence of positron component significantly modifies the stability domains for small angles of propagation with the direction of modulation. The stationary solutions of NLS equation, i.e., bright and dark envelope solitons, become narrower as the concentration of positron component increases.

• OSTI ID: 21277220
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLLISIONLESS PLASMA
ELECTRONS
ION ACOUSTIC WAVES
IONS
MODULATION
NONLINEAR PROBLEMS
PERTURBATION THEORY
POSITRONS
SCHROEDINGER EQUATION
SOLITONS
WAVE PROPAGATION