Spectra of keV protons related to ion-cyclotron wave packets
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Abstract |
We 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 show steeping 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.
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Year of Publication |
2017
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Journal |
Physics of Plasmas
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Volume |
24
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Date Published |
01/2017
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URL |
http://http://aip.scitation.org/doi/abs/10.1063/1.4973323
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DOI |
http://dx.doi.org/10.1063/1.4973323
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