Other
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510441l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10441-10448.
Other
9
Ballooning Modes, Boundary Layer Plasmas, Current Sheets, Earth Magnetosphere, Magnetohydrodynamic Stability, Parallel Flow, Eigenvectors, Magnetic Signatures, Plasmapause, Plasmasphere
Scientific paper
Stability of the plasma sheet and plasma sheet boundary layer against the ballooning mode instability is investigated. The equilibrium state of a two-dimensional plasma sheet configuration with parallel sheared flow is modeled. This equilibrium is shown to be ballooning unstable when delta-W is not positive definite, where delta-W is the potential energy. The eigenmode structure of the ballooning mode is found by imposing the boundary conditions that the waves are totally reflected from the ionosphere, and that no waves are coming in from infinity. The eigenmode structure of the unstable balloning modes is highly oscillatory, extending beyond about 100 R(E). The ballooning modes are thus a possible candidate for explaining the MHD waves and other dynamical events observed in the magnetotail by ISEE 3 and other spacecraft.
Hameiri Eliezer
Lakhina Gurbax S.
Mond Michael
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