V-potential double layers and the formation of auroral arcs

Details V-potential double layers and the formation of auroral arcs V-potential double layers and the formation of auroral arcs

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrvl..45..803w&link_type=abstract

Physical Review Letters, vol. 45, Sept. 8, 1980, p. 803-806.

Physics

24

Auroral Arcs, Current Sheets, Electron Acceleration, Electrostatic Waves, Current Density, Electrodynamics, Field Aligned Currents, Geomagnetism, Ionospheric Conductivity, Ionospheric Drift, Potential Theory

Scientific paper

A simulation study of the electrostatic interaction of a field-aligned electron current sheet with ambient hot ions (Te/Ti not greater than 0.6) and a conducting boundary shows that a V-shaped potential double layer spontaneously develops and accelerates electrons to the ion thermal energy. It is proposed that this double-layer process is responsible for the aurora energy supply. Only as Te/Ti approaches unity, the potential exceeds Ti via resistivity enhanced by wave trapping of electrons.

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