Simulation of the outer radiation belt electrons near geosynchronous orbit including both radial diffusion and resonant interaction with Whistler-mode chorus waves

Varotsou, Athena; Boscher, Daniel; Bourdarie, Sebastien; Horne, Richard B.; Glauert, Sarah A.; Meredith, Nigel P.

Simulation of the outer radiation belt electrons near geosynchronous orbit including both radial diffusion and resonant interaction with Whistler-mode chorus waves

Varotsou, Athena; Boscher, Daniel; Bourdarie, Sebastien; Horne, Richard B. ORCID: https://orcid.org/0000-0002-0412-6407; Glauert, Sarah A. ORCID: https://orcid.org/0000-0003-0149-8608; Meredith, Nigel P. ORCID: https://orcid.org/0000-0001-5032-3463. 2005 Simulation of the outer radiation belt electrons near geosynchronous orbit including both radial diffusion and resonant interaction with Whistler-mode chorus waves. Geophysical Research Letters, 32 (19), L19106. 4, pp. 10.1029/2005GL023282

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Abstract/Summary

We present the first simulation results for electrons in the outer radiation belt near geosynchronous orbit, where radial diffusion and resonant interactions with whistler-mode chorus outside the plasmasphere are taken into account. Bounce averaged pitch-angle and energy diffusion rates are introduced in the Salammbô code for L ≤ 6.5, for electron energies between 10 keV and 3 MeV and fpe/fce values between 1.5 and 10. Results show that an initial seed population with a power law (Kappa) distribution and a characteristic plasmasheet energy of ∼5 keV can be accelerated up to a few MeV, for 4.5 < L < 6.6 and give a steady state profile similar to the one obtained from average satellite measurements. For a Kp = 4 magnetic storm simulation MeV electron fluxes increase by more than a factor of 10 on a timescale of 1 day. We conclude that whistler-mode chorus waves can be a major electron acceleration process at geostationary orbit.

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1029/2005GL023282

Programmes:

BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections

ISSN:

0094-8276

Additional Keywords:

Magnetosphere

NORA Subject Terms:

Atmospheric Sciences
Space Sciences