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| Titel |
Effects of spatial diffusion in the inner plasma sheet and the structure of the diffusion tensor |
| VerfasserIn |
V. E. Zakharov, M. I. Pudovkin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 2 ; Nr. 13, no. 2, S.111-117 |
| Datensatznummer |
250011741
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| Publikation (Nr.) |
 copernicus.org/angeo-13-111-1995.pdf |
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| Zusammenfassung |
| A standard pair of equations is used to
describe the behaviour of a single monoenergetic particle (proton or electron)
population on a geomagnetic flux tube drifting in the magnetosphere. When
particle losses from the drifting flux tube into the ionosphere are neglected,
this behaviour is adiabatic in a thermodynamic sense. For a population of
particles with an isotropic pitch-angle distribution, the generalization of that
system of equations is obtained by adding radial and azimuthal spatial diffusion
terms. The magnetic field is taken to be dipolar in the inner magnetosphere. The
potential electric field is assumed to consist of magnetospheric convection and
corotation components. Experimental data are used to estimate the radial
equatorial profiles of the plasma sheet pressure. Assuming that the local time
and L-shell variations are separable and supposing steady-state
conditions, the expressions for the diffusion tensor components are evaluated.
The influence of spatial diffusion on the radial and azimuthal profiles of the
plasma pressure in the inner plasma sheet is also discussed. |
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