Hydromagnetic waves for a collisionless plasma in strong magnetic fields

A hydrodynamic system of equations, valid in the limit in which the Larmor radius and the electron to ion mass ratio are both zero, and including the thermodynamic variables and the energy equation of the electrons, is used to investigate the propagation of small-amplitude waves in a collisionless h...

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Detalles Bibliográficos
Autor principal: Duhau, S.
Formato: JOUR
Materias:
HYDRODYNAMICS
MAGNETIC FIELD EFFECTS
MAGNETOHYDRODYNAMICS
COLLISIONLESS PLASMA
DISPERSION RELATIONS
HYDROMAGNETIC WAVES
PLASMAS
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00223778_v34_n1_p67_Duhau
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00223778_v34_n1_p67_Duhau
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spelling todo:paper_00223778_v34_n1_p67_Duhau2023-10-03T14:32:31Z Hydromagnetic waves for a collisionless plasma in strong magnetic fields Duhau, S. HYDRODYNAMICS MAGNETIC FIELD EFFECTS MAGNETOHYDRODYNAMICS COLLISIONLESS PLASMA DISPERSION RELATIONS HYDROMAGNETIC WAVES PLASMAS A hydrodynamic system of equations, valid in the limit in which the Larmor radius and the electron to ion mass ratio are both zero, and including the thermodynamic variables and the energy equation of the electrons, is used to investigate the propagation of small-amplitude waves in a collisionless heat-conducting plasma. The result is compared with that derived from the Chew, Goldberger & Low equations. It is found that for zero heat flux, the inclusion of the electron pressure does not change the number and characteristic of the modes but modifies the mirror stability criterion. In the general case, the phase speed is symmetric with respect to two axes: one parallel to the heat flux vector and the other normal to it. The heat flux generates a new mode and couples strongly the slow and fast magnetosonic modes whose wavenumber vectors have projections in the positive flux vector direction, giving rise to a new overstability whose existence does not depend on the ion anisotropy. © 1985, Cambridge University Press. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00223778_v34_n1_p67_Duhau
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic HYDRODYNAMICS
MAGNETIC FIELD EFFECTS
MAGNETOHYDRODYNAMICS
COLLISIONLESS PLASMA
DISPERSION RELATIONS
HYDROMAGNETIC WAVES
PLASMAS
spellingShingle HYDRODYNAMICS
MAGNETIC FIELD EFFECTS
MAGNETOHYDRODYNAMICS
COLLISIONLESS PLASMA
DISPERSION RELATIONS
HYDROMAGNETIC WAVES
PLASMAS
Duhau, S.
Hydromagnetic waves for a collisionless plasma in strong magnetic fields
topic_facet HYDRODYNAMICS
MAGNETIC FIELD EFFECTS
MAGNETOHYDRODYNAMICS
COLLISIONLESS PLASMA
DISPERSION RELATIONS
HYDROMAGNETIC WAVES
PLASMAS
description A hydrodynamic system of equations, valid in the limit in which the Larmor radius and the electron to ion mass ratio are both zero, and including the thermodynamic variables and the energy equation of the electrons, is used to investigate the propagation of small-amplitude waves in a collisionless heat-conducting plasma. The result is compared with that derived from the Chew, Goldberger & Low equations. It is found that for zero heat flux, the inclusion of the electron pressure does not change the number and characteristic of the modes but modifies the mirror stability criterion. In the general case, the phase speed is symmetric with respect to two axes: one parallel to the heat flux vector and the other normal to it. The heat flux generates a new mode and couples strongly the slow and fast magnetosonic modes whose wavenumber vectors have projections in the positive flux vector direction, giving rise to a new overstability whose existence does not depend on the ion anisotropy. © 1985, Cambridge University Press. All rights reserved.
format JOUR
author Duhau, S.
author_facet Duhau, S.
author_sort Duhau, S.
title Hydromagnetic waves for a collisionless plasma in strong magnetic fields
title_short Hydromagnetic waves for a collisionless plasma in strong magnetic fields
title_full Hydromagnetic waves for a collisionless plasma in strong magnetic fields
title_fullStr Hydromagnetic waves for a collisionless plasma in strong magnetic fields
title_full_unstemmed Hydromagnetic waves for a collisionless plasma in strong magnetic fields
title_sort hydromagnetic waves for a collisionless plasma in strong magnetic fields
url http://hdl.handle.net/20.500.12110/paper_00223778_v34_n1_p67_Duhau
work_keys_str_mv AT duhaus hydromagneticwavesforacollisionlessplasmainstrongmagneticfields
_version_ 1782025112897191936

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