Particle acceleration and wave emissions associated with the formation of auroral cavities and enhancements

Details Particle acceleration and wave emissions associated with the formation of auroral cavities and enhancements Particle acceleration and wave emissions associated with the formation of auroral cavities and enhancements

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9314567w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Dec. 1, 1988, p. 14567-14590. Research supported by the Lockheed Inde

Physics

21

Auroral Electrojets, Night Sky, Particle Acceleration, Plasma-Particle Interactions, Electron Density (Concentration), Field Aligned Currents, Magnetosphere-Ionosphere Coupling, Plasma-Electromagnetic Interaction, Space Charge

Scientific paper

A unified model is presented which interrelates the various processes involved in auroral particle acceleration and the associated wave emissions, and it is shown how energy is coupled from the magnetosphere into the ionosphere. The phenomena in the magnetotail which can provide the source of free energy for the perpendicular electrostatic shocks are identified along with the associated potential structures in the nightside auroral region. The characteristics of the particle acceleration produced by the shock are described, including efficiency and energy transport between magnetospheric and ionospheric plasmas, the properties of the particle distributions throughout the shock region and return current regions, and the associated wave emissions. The source of free energy for the generation of ion conics is identified, as are the signatures for the formation of plasma cavities and/or enhancements.

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