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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 ne 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.
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 ne 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, ° and increase as kinetic energy increases, suggesting that R-mode waves have potential for pitch angle scattering of highly energetic (~ 1 MeV) protons but canno t rapidly accelerate protons.