Influence of superthermal and trapped electrons on oblique propagation of ion-acoustic waves in magnetized plasma

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3503664· OSTI ID:21531960

Ahmadihojatabad, N; Abbasi, H ^[1]; Pajouh, H Hakimi ^[2]

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1. Faculty of Physics, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran (Iran, Islamic Republic of)
2. Department of Physics, Alzahra University, Tehran 19834 (Iran, Islamic Republic of)

Effects of superthermal and trapped electrons on the oblique propagation of linear and nonlinear ion-acoustic waves in an electron-ion plasma in the presence of a uniform external magnetic field are investigated. In order to model the superthermal electrons, a Lorentzian (kappa) velocity distribution function has been employed. The ions are cold and their dynamics are studied by hydrodynamic equations. First, the linear dispersion relation of the fast and slow modes are obtained. It is shown that the superthermal electrons cause the both modes to propagate with smaller phase velocities. Then, modified Korteweg-de Vries equations describing the propagation of nonlinear slow and fast ion-acoustic waves are derived. It is shown that the presence of superthermal and trapped electrons has great influence on the nature of magnetized ion-acoustic solitons. The dependency of soliton attributes to the parameters associated with the superthermality and trapping mechanism will be shown.

• OSTI ID: 21531960
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
DISTRIBUTION FUNCTIONS
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FLUID MECHANICS
FUNCTIONS
HYDRODYNAMICS
ION ACOUSTIC WAVES
ION WAVES
KORTEWEG-DE VRIES EQUATION
LEPTONS
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MECHANICS
NONLINEAR PROBLEMS
PARTIAL DIFFERENTIAL EQUATIONS
PHASE VELOCITY
PLASMA
PLASMA WAVES
QUASI PARTICLES
SOLITONS
TRAPPED ELECTRONS
VELOCITY
WAVE PROPAGATION