Physics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96..209w&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Jan. 1, 1991, p. 209-216. Research supported by SERC.
Physics
7
Cold Plasmas, Magnetic Disturbances, Magnetic Field Configurations, Magnetic Flux, Plasma Density, Boundary Layer Plasmas, Magnetic Compression, Plasma Compression
Scientific paper
In general, the eigenmodes of a cold inhomogeneous magnetoplasma have magnetic field perturbations with components both parallel and transverse to the background magnetic field direction. Recently, constraints have been derived which the medium must satisfy for the field perturbation to be either entirely compressional, or entirely transverse. Here, these criteria are investigated to yield all planar and axisymmetric magnetic field configurations allowing pure decoupled transverse and compressional oscillations. For example, in an axisymmetric dipole field, the azimuthal field perturbations decouple exactly, but solely poloidal transverse ones do not. The magnetic field geometry and background plasma density for the most useful decoupled solutions are listed in a table.
Evans Wyn N.
Wright Andrew. N.
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