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Proceedings Paper

Electric field generation in the plasma sheet
Author(s): Valery V. Denissenko; Anatoly V. Kitaev
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Paper Abstract

The plasma sheet is considered as a thin electrically conducting layer with a prescribe flow across the magnetic field lines at the equatorial plane of the magnetotail. Electric field resulting from the geomagnetic field diffusion into the solar wind is also added to the model. This gives a defined electric potential distribution at the flanks of the plasma sheet. The calculated electric potential from the plasma sheet and from the diffusive magnetopause is projected to the ionosphere along the magnetic field lines. At the ionospheric level they map to an oval strip at the polar cap boundary. Electric potential in the regions of the ionosphere both poleward and equatorward of this region is obtained by numerical solving of the problem of electric conductivity in the ionosphere. The patterns of electric potential contours in the ionosphere are similar to that known from observations. The positive and negative peaks of electric potential located at dawn and dusk sides of the polar oval correspond to the same peaks in the far plasma sheet at distance of about 150 RE. The influence of the flow in the plasma sheet and other parameters of the model on the electric potential distribution in the ionosphere is discussed. The total potential drop across the polar cap is equal to 100 kV that exceed observed value. A conclusion is made that resistance to the field-aligned currents in the tail lobes should be taken into account.

Paper Details

Date Published: 28 February 2002
PDF: 6 pages
Proc. SPIE 4678, Eighth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, (28 February 2002); doi: 10.1117/12.458486
Show Author Affiliations
Valery V. Denissenko, Institute of Computational Modeling (Russia)
Anatoly V. Kitaev, Institute of Computational Modeling (Russia)


Published in SPIE Proceedings Vol. 4678:
Eighth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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