Simulation of the ejection of plasma from the polar ionosphere

Details Simulation of the ejection of plasma from the polar ionosphere Simulation of the ejection of plasma from the polar ionosphere

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9512103s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Aug. 1, 1990, p. 12103-12118.

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24

Convection Currents, Ionospheric Electron Density, Plasma Currents, Polar Caps, Flow Equations, Geomagnetic Tail, Hydrogen Ions, Oxygen Ions

Scientific paper

In the present numerical model for calculating H(+) and O(+) ion densities, fluxes, and temperatures, as well as the temperature of electrons, on a convecting magnetic field line, the one-dimensional fluid equations are solved along a field line path extending from 100-km altitude into the magnetotail. The evolution of O(+) and H(+) densities is calculated on field lines convecting over the polar cap. The results obtained indicate that centrifugal force is effective in accelerating ionospheric H(+) plasma outward into the magnetotail, while the 'smothering' effect of the H(+) plasma, on top of the O(+) plasma, prevents any ejection of the latter as long as its scale height is smaller than that of the H(+) plasma.

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