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Title: Electromagnetic ion acoustic perturbations in spatially varying plasma

Abstract

It is pointed out that an ion acoustic wave in an inhomogeneous plasma naturally couples with a transverse (with respect to the direction of the wave vector) electromagnetic perturbation. Due to this coupling, the ion acoustic mode becomes essentially electromagnetic. In addition, there appears to be a lower frequency cutoff of the ion acoustic wave. The wave becomes dispersive and backward, i.e., with a negative group velocity. The presented coupling mechanism should play a role in the magnetic field generation in spatially inhomogeneous plasmas at the ion acoustic time scale.

Authors:
;  [1];  [2]
  1. Center for Plasma Astrophysics, Celestijnenlaan 200B, 3001 Leuven (Belgium)
  2. Theoretical Plasma Physics Division (TPPD), PINSTECH, P.O. Nilore, Islamabad (Pakistan)
Publication Date:
OSTI Identifier:
20974905
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 3; Other Information: DOI: 10.1063/1.2715915; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DISTURBANCES; ELECTROMAGNETIC RADIATION; INHOMOGENEOUS PLASMA; ION ACOUSTIC WAVES; IONS; MAGNETIC FIELDS; VELOCITY

Citation Formats

Vranjes, J., Poedts, S., and Saleem, H.. Electromagnetic ion acoustic perturbations in spatially varying plasma. United States: N. p., 2007. Web. doi:10.1063/1.2715915.
Vranjes, J., Poedts, S., & Saleem, H.. Electromagnetic ion acoustic perturbations in spatially varying plasma. United States. doi:10.1063/1.2715915.
Vranjes, J., Poedts, S., and Saleem, H.. Thu . "Electromagnetic ion acoustic perturbations in spatially varying plasma". United States. doi:10.1063/1.2715915.
@article{osti_20974905,
title = {Electromagnetic ion acoustic perturbations in spatially varying plasma},
author = {Vranjes, J. and Poedts, S. and Saleem, H.},
abstractNote = {It is pointed out that an ion acoustic wave in an inhomogeneous plasma naturally couples with a transverse (with respect to the direction of the wave vector) electromagnetic perturbation. Due to this coupling, the ion acoustic mode becomes essentially electromagnetic. In addition, there appears to be a lower frequency cutoff of the ion acoustic wave. The wave becomes dispersive and backward, i.e., with a negative group velocity. The presented coupling mechanism should play a role in the magnetic field generation in spatially inhomogeneous plasmas at the ion acoustic time scale.},
doi = {10.1063/1.2715915},
journal = {Physics of Plasmas},
number = 3,
volume = 14,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}