Relativistic wave-particle interaction in magnetospheric plasmas

Computer Science

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The interaction between electromagnetic waves and high energy particles both in the magnetosphere of Earth and Jupiter has been investigated in a great detail. Different models for the electron distribution function has been used to determine the synchrotron radiation in the Jovian inner magnetosphere and the growth rate of R- mode waves in a relativistic plasma. Using a bi-loss-cone distribution function (composed of a high anisotropic component and a quasi-isotropic component), the whistler- mode wave growth has been calculated for the interchange events in the Io torus and for chorus emissions during a terrestrial substorm. We demonstrated that the path integrated gain can be dramatically enhanced over quiescent condition; exceed 20 e-foldings in the interchange event or approach 10 e-foldings during the terrestrial substorm. The wave excitation can cause strong pitch angle scattering leading to quasi-isotropic pitch angle distributions during Jovian interchange event and the terrestrial substorm. The relativistic wave- particle resonant diffusion curves for electron cyclotron resonance with both electromagnetic subluminous waves (electromagnetic R mode and L mode) and superluminous waves (R-X mode, L-O mode and L-X mode) have been constructed and their application are studied to electron acceleration in the Earth magnetosphere at the locations both inside and outside the plasmapause.

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