Abstract
Energetic particle dynamics in strongly turbulent magnetospheric plasma is considered using the model of solitary electrostatic structures. In these structures, the electric field component that is parallel to magnetic field is antisymmetric with respect to the centre of the structure. In addition, the electric field component that is perpendicular to magnetic field is symmetric. The stationary kinetic equation is solved for the typical particle energies. The results obtained show that a strong plasma turbulence can effectively accelerate electrons and ions. The velocities of the suprathermal electrons are directed almost along the magnetic field while the ion distributions are essentially isotropic. The electrostatic turbulent structures can form several particle beams with narrow energetic distributions. The results obtained are of great importance for studying the distributions of energetic particles in the auroral magnetosphere.
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