%0 Journal Article
%T Parametric validations of analytical lifetime estimates for radiation belt electron diffusion by whistler waves
%A A. V. Artemyev
%A D. Mourenas
%A O. V. Agapitov
%A V. V. Krasnoselskikh
%J Annales Geophysicae (ANGEO)
%D 2013
%I Copernicus Publications
%X 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.
%U http://www.ann-geophys.net/31/599/2013/angeo-31-599-2013.html