A modal view of oscillations in inhomogeneous compressible MHD

P. S. Cally, S. T. Maddison

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Abstract

The description of oscillations in inhomogeneous magnetohydrodynamic plasmas in terms of spatial Fourier modes is extended beyond the previous analyses of the incompressible case to a fully compressible plasma in a rigid box. Attention is focused upon the cusp and Alfvén continua and the discrete fast-mode spectrum. As well as providing a convenient method of numerical solution, the modal approach yields novel insights: in particular, the energy ultimately 'absorbed' resonantly is just that initially (and always) residing in the continua, and is readily calculated.

Original languageEnglish
Pages (from-to)591-609
Number of pages19
JournalJournal of Plasma Physics
Volume57
Issue numberPART 3
DOIs
Publication statusPublished - 1 Jan 1997

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