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| Titel |
Parametric validations of analytical lifetime estimates for radiation belt electron diffusion by whistler waves |
| VerfasserIn |
A. V. Artemyev, D. Mourenas, O. V. Agapitov, V. V. Krasnoselskikh |
| 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 ; 31, no. 4 ; Nr. 31, no. 4 (2013-04-05), S.599-624 |
| Datensatznummer |
250019018
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| Publikation (Nr.) |
 copernicus.org/angeo-31-599-2013.pdf |
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| Zusammenfassung |
| The lifetimes of electrons trapped in Earth's radiation belts can be
calculated from quasi-linear pitch-angle diffusion by whistler-mode waves,
provided that their frequency spectrum is broad enough and/or their average
amplitude is not too large. Extensive comparisons between improved analytical
lifetime estimates and full numerical calculations have been performed in a
broad parameter range representative of a large part of the magnetosphere
from L ~ 2 to 6. The effects of observed very oblique whistler waves
are taken into account in both numerical and analytical calculations.
Analytical lifetimes (and pitch-angle diffusion coefficients) are found to be
in good agreement with full numerical calculations based on CRRES and
Cluster hiss and lightning-generated wave measurements inside the plasmasphere and
Cluster lower-band chorus waves measurements in the outer belt for electron
energies ranging from 100 keV to 5 MeV. Comparisons with lifetimes recently
obtained from electron flux measurements on SAMPEX, SCATHA, SAC-C and DEMETER
also show reasonable agreement. |
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