Self-consistent particle and parallel electrostatic field distributions in the magnetospheric-ionospheric auroral region

Details Self-consistent particle and parallel electrostatic field distributions in the magnetospheric-ionospheric auroral region Self-consistent particle and parallel electrostatic field distributions in the magnetospheric-ionospheric auroral region

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83..629c&link_type=abstract

Journal of Geophysical Research, vol. 83, Feb. 1, 1978, p. 629-642. Research supported by the Aerospace Corp.;

Physics

92

Auroral Zones, Earth Magnetosphere, Electric Fields, Electron Precipitation, Geomagnetism, Self Consistent Fields, Electron Flux Density, Ion Distribution, Magnetic Flux, Mathematical Models

Scientific paper

The variation of the self-consistent electrostatic potential along the magnetic field is calculated by application of the principle of quasi-neutrality to the plasma components distributed along an auroral field line. The equilibrium plasma consists of hot anisotropic magnetospheric plasma, ionospheric plasma evaporated or extracted upward by the parallel electrostatic field, and backscattered electrons. It is shown that the above charged particle populations can support a potential difference of up to several kilovolts between the equator and the ionosphere along an auroral field line. Moreover, the corresponding parallel electric field has the proper signature to account for electron precipitation characteristics. Comparisons between theoretical and observed electron precipitation fluxes lead to estimates for the various physical parameters in the model.

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