MHD wave coupling in inhomogeneous media

Details MHD wave coupling in inhomogeneous media MHD wave coupling in inhomogeneous media

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1951w&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Nov. 1991, p. 1951-1954. Research supported by SERC.

Physics

5

Cold Plasmas, Coupled Modes, Inhomogeneity, Magnetohydrodynamic Waves, Space Plasmas, Fourier Analysis, Linear Equations, Resonant Frequencies, Wave Equations

Scientific paper

The medium is assumed to have an invariant direction and carries an arbitrary solenoidal background magnetic field. Wave fields are Fourier-analyzed with wave number k-beta in the invariant direction. The coupled linearized wave fields are then expanded in a power series to yield a decoupled hierarchy of inhomogeneous wave equations. The higher-order terms in the series represent wave coupling phenomena such as the resonant excitation of Alfven waves, and the damping of a magnetospheric cavity mode.

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