Ambipolar limit of electron precipitation

Details Ambipolar limit of electron precipitation Ambipolar limit of electron precipitation

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..343l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 5, p. 343-346.

Physics

1

Ambipolar Diffusion, Electron Precipitation, Magnetic Flux, Magnetosphere-Ionosphere Coupling, Electric Fields, Ionospheric Electron Density, Maxwell-Boltzmann Density Function, Particle Precipitation

Scientific paper

The concept of an isolated flux tube (IFT) in the earth's magnetosphere was studied with the objective of showing that there is a global charge neutrality condition related to particle precipitation. Specific aspects of ambipolar coupling are discussed. The value of the ambipolar drop, the effects of loss cone depletion, the outflow of ionospheric electrons extracted by the ambipolar field, and point-to-point distribution of the potential are examined. The validity of the treatment is restricted to cases with weak field-aligned currents by the noninteractive assumption. The model used is simple and is limited by some major uncertainties but sheds some light on important problems in magnetospheric physics.

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