Effect of acceleration and loss rates on time variations in energetic electron fluxes during geomagnetic disturbances

The general properties of the effect of the acceleration and loss rate on the time variations in relativistic electron fluxes have been studied based on the analytical solutions to the nonstationary equation for the particle distribution function, taking into account diffusion in the momentum space...

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Bibliographic Details
Published in:Geomagnetism and Aeronomy 2009-02, Vol.49 (1), p.14-23
Main Authors: Bakhareva, M. F., Orlova, K. G.
Format: Article
Language:English
Subjects:
Aeronomy
Earth and Environmental Science
Earth Sciences
Electrons
Geophysics
Geophysics/Geodesy
Magnetic fields
Particle physics
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Summary:The general properties of the effect of the acceleration and loss rate on the time variations in relativistic electron fluxes have been studied based on the analytical solutions to the nonstationary equation for the particle distribution function, taking into account diffusion in the momentum space (stochastic acceleration) and loss (due to particle escape from the acceleration region). The results of calculating the time variations in the fluxes of electrons with energies of 1 MeV are presented for different ratios of the loss-to-acceleration rates. The cases of instantaneous and prolonged injection of low-energy particles are considered. It has been proposed to estimate the acceleration and loss rate effectiveness based on the observed electron flux decrease rate at the end of the magnetic storm recovery phase.
ISSN:0016-7932
1555-645X
0016-7940
DOI:10.1134/S0016793209010022