Biblio

Found 2 results
Filters: Keyword is particle trapping  [Clear All Filters]
2018
Authors: Damiano P.A., Chaston C.C., Hull A.J., and Johnson J.R.
Title: Electron Distributions in Kinetic Scale Field Line Resonances: A Comparison of Simulations and Observations
Abstract: Observations in kinetic scale field line resonances, or eigenmodes of the geomagnetic field, reveal highly field‐aligned plateaued electron distributions. By combining observations from the Van Allen Probes and Cluster spacecraft with a hybrid kinetic gyrofluid simulation we show how these distributions arise from the nonlocal self‐consistent interaction of electrons with the wavefield. This interaction is manifested as electron trapping in the standing wave potential. The process operates along most of the field line and qualitatively accounts for electron observations near the equatorial plane and at higher latitudes. In conjunction with the highly field‐aligned plateaus, loss cone features are also evident, which result from the action of the upward‐directed wave parallel electr. . .
Date: 06/2018 Publisher: Geophysical Research Letters DOI: 10.1029/2018GL077748 Available at: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL077748
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2014
Authors: Artemyev A. V., Vasiliev A. A., Mourenas D., Agapitov O. V., Krasnoselskikh V., et al.
Title: Fast transport of resonant electrons in phase space due to nonlinear trapping by whistler waves
Abstract: We present an analytical, simplified formulation accounting for the fast transport of relativistic electrons in phase space due to wave-particle resonant interactions in the inhomogeneous magnetic field of Earth's radiation belts. We show that the usual description of the evolution of the particle velocity distribution based on the Fokker-Planck equation can be modified to incorporate nonlinear processes of wave-particle interaction, including particle trapping. Such a modification consists in one additional operator describing fast particle jumps in phase space. The proposed, general approach is used to describe the acceleration of relativistic electrons by oblique whistler waves in the radiation belts. We demonstrate that for a wave power distribution with a hard enough power law tail in. . .
Date: 08/2014 Publisher: Geophysical Research Letters Pages: 5727 - 5733 DOI: 10.1002/grl.v41.1610.1002/2014GL061380 Available at: http://doi.wiley.com/10.1002/grl.v41.16http://doi.wiley.com/10.1002/2014GL061380
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