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Titel |
Electron Acceleration in the radiation belts: wave obliquity effects for Kp < 5 and modifications of the particle distribution for Kp > 5 |
VerfasserIn |
Didier Mourenas, Anton Artemyev, Oleksiy Agapitov, Vladimir Krasnoselskikh, Forrest Mozer |
Konferenz |
EGU General Assembly 2015
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 17 (2015) |
Datensatznummer |
250101969
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Publikation (Nr.) |
EGU/EGU2015-1465.pdf |
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Zusammenfassung |
Electron scattering and energization in the outer radiation belt at L = 5 is examined. Based on new parameterizations of chorus obtained from 11 years of Cluster data, electron lifetimes and energization rates are shown to vary with Kp or Dst as a result of simultaneous but adverse variations of the latitudinal distribution of chorus wave intensity and wave obliquity with geomagnetic activity. Non-monotonous variations are revealed during moderate activity. During strong storms, the energization of the particle distribution is compared with a simplified model of energy broadening, allowing to recover simulation results and further suggesting a new way of inferring MLT-averaged chorus wave amplitudes (or alternatively, plasma density) from particle measurements performed at one point in the equatorial plane. |
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