Variations of thermal electron energy distribution associated with field-aligned currents

Details Variations of thermal electron energy distribution associated with field-aligned currents Variations of thermal electron energy distribution associated with field-aligned currents

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..349a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Feb. 1991, p. 349-352.

Physics

4

Auroral Zones, Electron Energy, Energy Distribution, Field Aligned Currents, Electron Counters, Exos Satellites, Exos-D Satellite, Radiation Counters, Satellite Observation, Satellite-Borne Instruments

Scientific paper

Relationships between thermal electrons and field-aligned currents (FACs) in the auroral region have been investigated using data simultaneously obtained from the thermal Electron Detector (TED) and the flux-gate magnetometer, both onboard the Exos-D satellite. Several features resulted from the observations are summarized: (1) at altitudes from 300 to 1800 km, electron temperature in the upward FAC region is higher than that of the neighboring no-FAC region by the increment Delta T = 1100-9500 K, while the temperature is lower in the downward FAC region by the decrement -Delta T = 500-1500 K; (2) the electron temperature increase in the upward-current region grows with an increase of the FAC density, and (3) the thermal electrons do not have Maxwell distribution in the upward-current region at altitudes higher than about 2000 km.

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