Shprits Y. Y., D. A. Subbotin, N. P. Meredith, S. R. Elkington, (2008), Review of modeling of losses and sources of relativistic electrons in the outer radiation belt II: Local acceleration and loss, Journal Of Atmospheric And Solar-terrestrial Physics, 70, 1694 – 1713, doi:10.1016/j.jastp.2008.06.014, Dynamic Variability of Earth’s Radiation Belts

## Abstract

This paper focuses on the modeling of local acceleration and loss processes in the outer radiation belt. We begin by reviewing the statistical properties of waves that violate the first and second adiabatic invariants, leading to the loss and acceleration of high energy electrons in the outer radiation belt. After a brief description of the most commonly accepted methodology for computing quasi-linear diffusion coefficients, we present pitch-angle scattering simulations by (i) plasmaspheric hiss, (ii) a combination of plasmaspheric hiss and electromagnetic ion cyclotron (EMIC) waves, (iii) chorus waves, and (iv) a combination of chorus and EMIC waves. Simulations of the local acceleration and loss processes show that statistically, the net effect of chorus waves is acceleration at MeV energies and loss at hundreds of keV energies. The combination of three-dimensional (3D) simulations of the local processes and radial transport show that the complexity of the behavior of the radiation belts is due to a number of competing processes of acceleration and loss, and depends on the dynamics of the plasmasphere, ring current, and solar wind conditions.## Authors (sorted by name)

Elkington Meredith Shprits Subbotin## Journal / Conference

Journal Of Atmospheric And Solar-terrestrial Physics## Acknowledgments

This research was supported by NSF GEM Grants ATM-0603191 and NASA LWS Grant NNX06AB84G and AFRL Grant FA9550-08-1-0140. The authors would like to thank Richard M. Thorne and Michael Schulz for useful discussions.## Grants

ATMβ0603191 FA9550β08β1β0140 NNX06AB84G## Bibtex

@article{SHPRITS20081694,
title = "Review of modeling of losses and sources of relativistic electrons in the outer radiation belt II: Local acceleration and loss",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
volume = "70",
number = "14",
pages = "1694 - 1713",
year = "2008",
note = "Dynamic Variability of Earth's Radiation Belts",
issn = "1364-6826",
doi = "10.1016/j.jastp.2008.06.014",
url = "http://www.sciencedirect.com/science/article/pii/S1364682608001673",
author = "Yuri Y. Shprits and Dmitriy A. Subbotin and Nigel P. Meredith and Scot R. Elkington",
keywords = "Radiation belts, Local acceleration, Local loss, Modeling",
abstract = "This paper focuses on the modeling of local acceleration and loss processes in the outer radiation belt. We begin by reviewing the statistical properties of waves that violate the first and second adiabatic invariants, leading to the loss and acceleration of high energy electrons in the outer radiation belt. After a brief description of the most commonly accepted methodology for computing quasi-linear diffusion coefficients, we present pitch-angle scattering simulations by (i) plasmaspheric hiss, (ii) a combination of plasmaspheric hiss and electromagnetic ion cyclotron (EMIC) waves, (iii) chorus waves, and (iv) a combination of chorus and EMIC waves. Simulations of the local acceleration and loss processes show that statistically, the net effect of chorus waves is acceleration at MeV energies and loss at hundreds of keV energies. The combination of three-dimensional (3D) simulations of the local processes and radial transport show that the complexity of the behavior of the radiation belts is due to a number of competing processes of acceleration and loss, and depends on the dynamics of the plasmasphere, ring current, and solar wind conditions."
}