Observations And Simulations On Wave-particle Interactions In The Inner Magnetosphere

In the inner magnetosphere, there are abundant charged particles with differ-ent energies and various plasma waves with different frequencies. Wave-particle interaction plays an important role in wave excitation and particle evolution. Based on quasi-linear theory, test-particle method and satellite observation, this dissertation comprehensively analyzes some cyclotron resonance processes in the inner magnetosphere.In the first chapter, we introduce the main components of charged particle and several important plasma waves in the inner magnetosphere, describe the concept of wave-particle interactions, and emphasize their significance in the inner magnetospheric dynamics.In the second chapter, we adopt an exact dispersion relation in multi-ions cold plasma and develop a new quasi-linear bounce-averaged diffusion coefficien-t model. The model is able to calculate the diffusion coefficients of arbitrary charged particles driven by arbitrary cold-plasma waves. We calculate the dif-fusion coefficients of radiation belt electron and ring current protons for several plasma waves, and particularly analyze the dependence of magnetosonic-wave-driven electron acceleration on wave frequency distribution.In the third chapter, we develop a test-particle model to investigate the cy-clotron resonance between monochromatic parallel-propagating EMIC waves and charged particles. We analyze three important nonlinear mechanisms driven by large amplitude EMIC waves, compare the diffusion coefficients of test-particle model with those of quasi-linear model, and emphasize the significant influence of nonlinear mechanisms.In the fourth chapter, we introduce Van Allen Probes and coherence anal-ysis method for plasma waves. Using Van Allen Probes data, we show the first observational evidence for the origination of exohiss from plasmaspheric hiss. Fur-thermore, through the quasi-linear calculations, we reveal the loss effect of exohiss waves on the radiation belt electrons.In the fifth chapter, we review the adopted analysis method and the ob-tained results, and propose the future works about magnetospheric wave-particle interactions.