Higher-order contribution to obliquely nonlinear electron-acoustic waves with electron beam in a magnetized plasma

Journal Article · Thu Sep 15 04:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2041367· OSTI ID:20764520

El-Labany, S K; El-Taibany, W F; El-Abbasy, O M ^[1]

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1. Department of Physics, Faculty of Science-Damietta, Mansoura University, Damietta El-Gedida, P.O. 34517 (Egypt)

Propagation of electron-acoustic waves in a strongly magnetized four-component plasma consisting of cold and hot electrons, a warm electron beam, and stationary ions is investigated. The present model considered weakly dispersive and strongly magnetized plasma in the limit of long wavelengths. The introduction of an electron beam allows the existence of electron-acoustic solitons with velocity related to the beam velocity. With increasing the beam velocity and the beam temperature, both the soliton amplitude and the width increase. Applying a reductive perturbation theory, a nonlinear Zakharov-Kuznetsov (ZK) equation for the first-order perturbed potential and a linear inhomogeneous Zakharov-Kuznetsov (ZK-type) equation for the second-order perturbed potential are derived. Stationary solutions of these coupled equations are obtained using a renormalization method. These solutions admit either compressive or rarefactive soliton type depending on the electron-beam parameters. Moreover, the dependence of the solution on the beam parameters, obliqueness on the magnetic field, and the magnetic field itself is also investigated. The application of the present investigation to the broadband electrostatic noise in the dayside auroral zone of the Earth's magnetosphere is considered.

• OSTI ID: 20764520
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 12; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
AURORAL ZONES
BEAM-PLASMA SYSTEMS
EARTH MAGNETOSPHERE
ELECTRON BEAMS
ELECTRON PLASMA WAVES
ELECTRONS
EQUATIONS
IONS
MAGNETIC FIELDS
MATHEMATICAL SOLUTIONS
NOISE
NONLINEAR PROBLEMS
PERTURBATION THEORY
PLASMA
POTENTIALS
RENORMALIZATION
SOLITONS
VELOCITY