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Nonlinear Compressional Electromagnetic Ion-cyclotron Wavepackets in Space Plasmas : Volume 12, Issue 4 (07/04/2005)

By Kourakis, I.

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Book Id: WPLBN0004019695
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Nonlinear Compressional Electromagnetic Ion-cyclotron Wavepackets in Space Plasmas : Volume 12, Issue 4 (07/04/2005)  
Author: Kourakis, I.
Volume: Vol. 12, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Kourakis, I., & Shukla, P. K. (2005). Nonlinear Compressional Electromagnetic Ion-cyclotron Wavepackets in Space Plasmas : Volume 12, Issue 4 (07/04/2005). Retrieved from http://hawaiilibrary.net/


Description
Description: Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, 44780 Bochum,. The parametric coupling between large amplitude magnetic field-aligned circularly polarized electromagnetic ion-cyclotron (EMIC) waves and ponderomotively driven ion-acoustic perturbations in magnetized space plasmas is considered. A cubic nonlinear Schrödinger equation for the modulated EMIC wave envelope is derived, and then solved analytically. The modulated EMIC waves are found to be stable (unstable) against ion-acoustic density perturbations, in the subsonic (supersonic, respectively) case, and they may propagate as supersonic bright (`subsonic dark, i.e. black or grey)type envelope solitons, i.e. electric field pulses (holes, voids),associated with (co-propagating) density humps. Explicit bright and dark (black/grey) envelope excitation profiles are presented, and the relevance of our investigation to space plasmas is discussed.

Summary
Nonlinear compressional electromagnetic ion-cyclotron wavepackets in space plasmas

 

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