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A modal view of oscillations in inhomogeneous compressible MHD

Published online by Cambridge University Press:  01 April 1997

P. S. CALLY  and
S. T. MADDISON
P. S. CALLY
Affiliation:
Department of Mathematics, Monash University, Clayton, Victoria 3168, Australia
S. T. MADDISON
Affiliation:
Department of Mathematics, Monash University, Clayton, Victoria 3168, Australia
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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.

Type
Research Article
Information
Journal of Plasma Physics , Volume 57 , Issue 3 , April 1997 , pp. 591 - 609
Copyright
1997 Cambridge University Press

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