Characteristics of auroral electron acceleration regions observed by Atmosphere Explorer C

Details Characteristics of auroral electron acceleration regions observed by Atmosphere Explorer C Characteristics of auroral electron acceleration regions observed by Atmosphere Explorer C

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.2223b&link_type=abstract

Journal of Geophysical Research, vol. 81, May 1, 1976, p. 2223-2230.

Physics

7

Auroral Electrojets, Electron Precipitation, Explorer 51 Satellite, Satellite Observation, Distribution Functions, Electron Accelerators, Electron Beams, Electron Distribution, Ionospheric Drift

Scientific paper

Satellite measurements of electron precipitation and ion drift velocities showed that electron acceleration regions (or inverted V's) in the 1200 to 1800 MLT quadrant exhibit the following systematic behavior: electron distribution functions in the accelerated region can be well described by Maxwellian primary electron beams accelerated through an electrostatic potential; the typical inverted V latitudinal structure is always observed in the accelerated regions, the electrostatic potential reaching a maximum and consequently decreasing to near zero over distances of 100 to 250 km; the Maxwellian temperature of the primary electron beam increases systematically with increasing electrostatic potential; rather weak acceleration regions, characterized by values of the electrostatic potential below 1 keV and values of the Maxwellian temperature between 100 and 350 eV, occur in the cusp and in the highest-latitude portion of the dusk side electron precipitation zone.

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