Ideal quasimodes reviewed in resistive magnetohydrodynamics

Journal Article · Mon Jun 03 04:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.2871· OSTI ID:5665185

Poedts, S ^[1]; Kerner, W ^[2]

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1. Max-Planck-Institut fuer Plasmaphysik, Boltzmannstrasse 2, D-8046 Garching bei Muenchen (Germany)
2. JET Joint Undertaking, Theory Division, Abingdon, Oxfordshire, OX14 3EA (United Kingdom)

The characteristics of so-called ideal quasimodes'' or collective modes'' are investigated in the framework of linearized, compressible and resistive magnetohydrodynamics. It is shown that ideal quasimodes correspond to weakly damped eigenmodes of the resistive-MHD differential operator. The damping of these modes becomes independent of the plasma resistivity in the limit of vanishing {eta}. Hence, for the first time in the range of the Alfven continuum, resistive eigenmodes have been found that converge to their ideal-MHD transforms as {eta}{r arrow}0.

• OSTI ID: 5665185
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:22; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640430* -- Fluid Physics-- Magnetohydrodynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALFVEN WAVES
COMPRESSIBILITY
DAMPING
DOCUMENT TYPES
EIGENVALUES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FLUID MECHANICS
HYDRODYNAMICS
HYDROMAGNETIC WAVES
INHOMOGENEOUS PLASMA
MAGNETOHYDRODYNAMICS
MECHANICAL PROPERTIES
MECHANICS
PHYSICAL PROPERTIES
PLASMA
REVIEWS
SINGULARITY