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Dispersive Mhd Waves and Alfvenons in Charge Non-neutral Plasmas : Volume 15, Issue 4 (08/08/2008)

By Stasiewicz, K.

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Book Id: WPLBN0003976634
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Dispersive Mhd Waves and Alfvenons in Charge Non-neutral Plasmas : Volume 15, Issue 4 (08/08/2008)  
Author: Stasiewicz, K.
Volume: Vol. 15, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Ekeberg, J., & Stasiewicz, K. (2008). Dispersive Mhd Waves and Alfvenons in Charge Non-neutral Plasmas : Volume 15, Issue 4 (08/08/2008). Retrieved from

Description: Swedish Institute of Space Physics, Uppsala and Kiruna, Sweden. Dispersive properties of linear and nonlinear MHD waves, including shear, kinetic, electron inertial Alfvén, and slow and fast magnetosonic waves are analyzed using both analytical expansions and a novel technique of dispersion diagrams. The analysis is extended to explicitly include space charge effects in non-neutral plasmas. Nonlinear soliton solutions, here called alfvenons, are found to represent either convergent or divergent electric field structures with electric potentials and spatial dimensions similar to those observed by satellites in auroral regions. Similar solitary structures are postulated to be created in the solar corona, where fast alfvenons can provide acceleration of electrons to hundreds of keV during flares. Slow alfvenons driven by chromospheric convection produce positive potentials that can account for the acceleration of solar wind ions to 300–800 km/s. New results are discussed in the context of observations and other theoretical models for nonlinear Alfvén waves in space plasmas.

Dispersive MHD waves and alfvenons in charge non-neutral plasmas

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