Electron acceleration in an array of auroral arcs

Details Electron acceleration in an array of auroral arcs Electron acceleration in an array of auroral arcs

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26...81b&link_type=abstract

Planetary and Space Science, vol. 26, Jan. 1978, p. 81-85, 87-92.

Physics

7

Auroral Arcs, Earth Magnetosphere, Electron Accelerators, Particle Acceleration, Atmospheric Models, Electrostatic Waves, Energy Spectra, Magnetohydrodynamic Stability, Plasma Acceleration

Scientific paper

Three related models of electron acceleration are tested across an array of auroral arcs. A potential difference between the source plasma in the magnetosphere and the observation point in the ionosphere is said to account for the acceleration in all three models. Two alternative mechanisms are proposed to explain the model having the best statistical data fit. In the first, a varying potential difference causes the acceleration. In the second, a constant potential difference operates in conjunction with plasma instabilities. Electrostatic waves, possibly together with a resonance mechanism, could also accelerate plasma to suprathermal energies.

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