Computer Science
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33.1433p&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 33, Dec. 1985, p. 1433-1437.
Computer Science
10
Current Sheets, Earth Magnetosphere, Energetic Particles, Geomagnetic Tail, Magnetic Disturbances, Nonadiabatic Theory, Scattering Coefficients, Atmospheric Models, Magnetic Rigidity
Scientific paper
The empirical model of disturbed magnetosphere of Tsyganenko and Usmanov (1982) and the semiempirical model of the storm-time magnetospheric configuration of Tsyganenko (1981) are used to find the critical energy for nonadiabatic particle scattering in the midnight sector. Computed values of E(crit) vs L are compared with the appropriate experimental data of Imhof et al. (1977). It is found that none of the considered models is able to reproduce the observed steep decrease of E(crit) with L. The steepest slope is given by the Tsyganenko model which includes a current sheet with finite thickness. The current sheet thickness is a crucial parameter in the nonadiabatic scattering problem. The discussion points the natural limitations of an empirical model as far as the current sheet thickness is to be determined. Imhof et al.'s data as well as some magnetic field data sets seem to indicate that magnetosphere models incorporating a thin current sheet and allowing for the thickness dependence on the geocentric distance would probably be closer to reality than the considered models, at least during higher levels of magnetic activity.
Popielawska Barbara
Szalinska-Piechota E.
Tsyganenko Nikolai A.
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