Supersonic regime of the Hall-magnetohydrodynamics resistive tearing instability

Ahedo Galilea, Eduardo and Ramos, Jesús J. (2012). Supersonic regime of the Hall-magnetohydrodynamics resistive tearing instability. "Physics of Plasmas", v. 19 (n. 7); pp.. ISSN 1070-664X. https://doi.org/10.1063/1.4739787.

Description

Title: Supersonic regime of the Hall-magnetohydrodynamics resistive tearing instability
Author/s:
  • Ahedo Galilea, Eduardo
  • Ramos, Jesús J.
Item Type: Article
Título de Revista/Publicación: Physics of Plasmas
Date: July 2012
ISSN: 1070-664X
Volume: 19
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Fundamentos Matemáticos de la Tecnología Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (288kB) | Preview

Abstract

An earlier analysis of the Hall-magnetohydrodynamics (MHD) tearing instability [E. Ahedo and J. J. Ramos, Plasma Phys. Controlled Fusion 51, 055018 (2009)] is extended to cover the regime where the growth rate becomes comparable or exceeds the sound frequency. Like in the previous subsonic work, a resistive, two-fluid Hall-MHD model with massless electrons and zero-Larmor-radius ions is adopted and a linear stability analysis about a force-free equilibrium in slab geometry is carried out. A salient feature of this supersonic regime is that the mode eigenfunctions become intrinsically complex, but the growth rate remains purely real. Even more interestingly, the dispersion relation remains of the same form as in the subsonic regime for any value of the instability Mach number, provided only that the ion skin depth is sufficiently small for the mode ion inertial layer width to be smaller than the macroscopic lengths, a generous bound that scales like a positive power of the Lundquist number

More information

Item ID: 16595
DC Identifier: http://oa.upm.es/16595/
OAI Identifier: oai:oa.upm.es:16595
DOI: 10.1063/1.4739787
Official URL: http://scitation.aip.org/content/aip/journal/pop/19/7/10.1063/1.4739787
Deposited by: Memoria Investigacion
Deposited on: 08 Apr 2014 17:04
Last Modified: 21 Apr 2016 16:55
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM