Numerical Studies of the Solar Energetic Particle Transport and Acceleration

Solar energetic particles often get accelerated to energies up to few GeV at interplanetary shock waves driven by Coronal Mass Ejections (CMEs) and are of considerable importance for space weather studies because they can produce radiation hazards for manned or unmanned spacecraft. Particles accelerated at the shock wave can escape upstream and downstream into the interplanetary medium. As the escaped high-energy particles propagate along the interplanetary magnetic field, they are scattered by fluctuations of the turbulent magnetic field. The Monte-Carlo method has been adopted in this work to study propagation and scattering of solar energetic particles. We have demonstrated that high energy particles reach the orbit of the Earth before the bulk flow, which due to its high intensity produces main hazard. The detection of high energy particles may serve as a precursor of its arrival.