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Spectra of KeV Protons Related to Ion-Cyclotron Wave PacketsWe use the Fokker-Planck-Kolmogorov equation to study the statistical aspects of stochastic dynamics of the radiation belt (RB) protons driven by nonlinear electromagnetic ion-cyclotron (EMIC) wave packets. We obtain the spectra of keV protons scattered by these waves that showsteeping near the gyroresonance, the signature of resonant wave-particle interaction that cannot be described by a simple power law. The most likely mechanism for proton precipitation events in RBs is shown to be nonlinear wave-particle interaction, namely, the scattering of RB protons into the loss cone by EMIC waves.
Document ID
20170007791
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Khazanov, G. V.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Sibeck, D. G.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Tel'Nikhin, A. A.
(Altai State Univ. Barnaul, Russian Federation)
Kronberg, T. K.
(Altai State Univ. Barnaul, Russian Federation)
Date Acquired
August 17, 2017
Publication Date
January 4, 2017
Publication Information
Publication: Physics of Plasmas
Publisher: AIP Publishing
Volume: 24
Issue: 1
ISSN: 1070-664X
e-ISSN: 1089-7674
Subject Category
Plasma Physics
Report/Patent Number
GSFC-E-DAA-TN45724
Funding Number(s)
PROJECT: 673-2014-014
Distribution Limits
Public
Copyright
Other
Keywords
electromagnetic ion-cyclotron
waves

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