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Title: Compressional Alfvénic rogue and solitary waves in magnetohydrodynamic plasmas

Generation of compressional Alfvénic rogue and solitary waves in magnetohydrodynamic plasmas is investigated. Dispersive effect caused by non-ideal electron inertia currents perpendicular to the ambient magnetic field can balance the nonlinear steepening of waves leading to the formation of a soliton. The reductive perturbation method is used to obtain a Korteweg–de Vries (KdV) equation describing the evolution of the solitary wave. The height of a soliton is proportional to the soliton speed “U” and inversely proportional to plasma “β” (ratio of plasma thermal pressure to pressure of the confining magnetic field) and the width of soliton is proportional to the electron inertial length. KdV equation is used to study the nonlinear evolution of modulationally unstable compressional Alfvénic wavepackets via the nonlinear Schrödinger equation. The characteristics of rogue wave influenced by plasma “β” and the electron inertial length are described.
Authors:
; ;  [1]
  1. Department of Physics, POSTECH, Hyoja-Dong San 31, KyungBuk, Pohang 790-784 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22227855
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; ELECTRIC CURRENTS; ELECTRONS; KORTEWEG-DE VRIES EQUATION; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; MOMENT OF INERTIA; NONLINEAR PROBLEMS; PERTURBATION THEORY; PLASMA; PLASMA PRESSURE; PLASMA WAVES; SCHROEDINGER EQUATION; SOLITONS; WAVE PACKETS