Ideal quasimodes reviewed in resistive magnetohydrodynamics

Details Ideal quasimodes reviewed in resistive magnetohydrodynamics Ideal quasimodes reviewed in resistive magnetohydrodynamics

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..66.2871p&link_type=abstract

Physical Review Letters, Volume 66, Issue 22, June 3, 1991, pp.2871-2874

Physics

38

Plasma Heating By Particle Beams

Scientific paper

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 η. Hence, for the first time in the range of the Alfvén continuum, resistive eigenmodes have been found that converge to their ideal-MHD transforms as η-->0.

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