Abstract
Using a realistic density model, we present a first study on the interactions between electromagnetic waves and energetic particles in the inner magnetosphere. Numerical calculations show that as the latitude λ increases, the number density n e increases, and resonant frequency range moves to lower pitch angles. During L-mode/electron and L-mode/proton interactions, the pitch angle diffusion dominates over the momentum diffusion. This indicates that L-mode waves are primarily responsible for pitch angle scattering. For R-mode/electron interaction, the momentum diffusion is found to be comparable to the pitch angle diffusion, implying that R-mode waves can play an important role in both pitch angle scattering and stochastic acceleration of electrons. For R-mode/proton interaction, diffusion coefficients locate primarily below pitch angle 60° and increase as kinetic energy increases, suggesting that R-mode waves have potential for pitch angle scattering of highly energetic (∼1 MeV) protons but cannot efficiently accelerate protons.
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He, Y., Chen, L., Xiao, F. et al. Interaction between electromagnetic waves and energetic particles by a realistic density model. Sci. China Technol. Sci. 53, 2552–2557 (2010). https://doi.org/10.1007/s11431-010-4072-7
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DOI: https://doi.org/10.1007/s11431-010-4072-7