Adiabatic theory in rapidly rotating magnetospheres

Details Adiabatic theory in rapidly rotating magnetospheres Adiabatic theory in rapidly rotating magnetospheres

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.5453c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, July 1, 1984, p. 5453-5459.

Physics

10

Adiabatic Conditions, Earth Magnetosphere, Jupiter Atmosphere, Planetary Magnetic Fields, Rotating Plasmas, Angular Velocity, Cold Plasmas, Equations Of Motion, Magnetic Field Configurations, Plasma Drift, Steady State

Scientific paper

The Jovian magnetosphere is a rapid rotator in the sense that the corotation velocity exceeds the gyrovelocity for most of the low-energy plasma particles. Ordinarily, an electric drift velocity greater than the gyrovelocity will destroy the near periodicity of the bounce motion, so the parallel invariant J will no longer be valid. However, this paper shows that J invariance actually remains valid in rapidly rotating magnetospheres so long as departures from rigid rotation are not too great. Northrop and Birmingham have already proved J invariance for the case of rapid but exactly rigid rotation, and this paper extends their results to nonrigid, rapid rotation with corotation lag and/or convection.

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