Structure of intermediate shocks in collisionsless anisotropic Hall-magnetohydrodynamics plasma models

Sánchez Arriaga, Gonzalo (2013). Structure of intermediate shocks in collisionsless anisotropic Hall-magnetohydrodynamics plasma models. "Physics of Plasmas", v. 20 ; pp.. ISSN 1070-664X. https://doi.org/10.1063/1.4824001.

Description

Title: Structure of intermediate shocks in collisionsless anisotropic Hall-magnetohydrodynamics plasma models
Author/s:
  • Sánchez Arriaga, Gonzalo
Item Type: Article
Título de Revista/Publicación: Physics of Plasmas
Date: 1 October 2013
ISSN: 1070-664X
Volume: 20
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The existence of discontinuities within the double-adiabatic Hall-magnetohydrodynamics (MHD) model is discussed. These solutions are transitional layers where some of the plasma properties change from one equilibrium state to another. Under the assumption of traveling wave solutions with velocity C and propagation angle θ with respect to the ambient magnetic field, the Hall-MHD model reduces to a dynamical system and the waves are heteroclinic orbits joining two different fixed points. The analysis of the fixed points rules out the existence of rotational discontinuities. Simple considerations about the Hamiltonian nature of the system show that, unlike dissipative models, the intermediate shock waves are organized in branches in parameter space, i.e., they occur if a given relationship between θ and C is satisfied. Electron-polarized (ion-polarized) shock waves exhibit, in addition to a reversal of the magnetic field component tangential to the shock front, a maximum (minimum) of the magnetic field amplitude. The jumps of the magnetic field and the relative specific volume between the downstream and the upstream states as a function of the plasma properties are presented. The organization in parameter space of localized structures including in the model the influence of finite Larmor radius is discussed

More information

Item ID: 26840
DC Identifier: http://oa.upm.es/26840/
OAI Identifier: oai:oa.upm.es:26840
DOI: 10.1063/1.4824001
Official URL: http://scitation.aip.org/content/aip/journal/pop/20/10/10.1063/1.4824001?ver=pdfcov
Deposited by: Memoria Investigacion
Deposited on: 13 Oct 2014 15:20
Last Modified: 19 Oct 2015 07:37
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