Superthermal ion signatures of auroral acceleration processes

Details Superthermal ion signatures of auroral acceleration processes Superthermal ion signatures of auroral acceleration processes

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.1611m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Feb. 1, 1985, p. 1611-1618, 1639-1642.

Physics

56

Auroral Zones, Ion Motion, Mass Spectroscopy, Particle Acceleration, Dynamics Explorer 1 Satellite, Energy Distribution, Night Sky, Oxygen Ions, Satellite-Borne Instruments

Scientific paper

The occurrence of non-Maxwellian superthermal features in the auroral topside ionosphere distribution functions has been documented by means of the retarding ion mass spectrometer on the Dynamics Explorer 1 spacecraft. Attention is given to a representative sampling of the observed features and their spatial morphology, as observed at altitudes ranging from a few thousand km to a few earth radii. The observations in question reveal a clear distinction between classical polar wind ion outflow and O(+)-enhanced superthermal flows, and confirm the importance of low altitude transverse acceleration in ionospheric plasma transport, as suggested by previous observations.

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