A numerical simulation of charged particle interactions with interplanetary shock waves

Computer Science

Scientific paper

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Computerized Simulation, Particle Interactions, Shock Waves, Solar Activity Effects, Charged Particles, Interplanetary Magnetic Fields, Particle Energy, Particle Trajectories, Shock Discontinuity, Shock Wave Interaction, Solar Flares

Scientific paper

A computer model, developed to numerically simulate the combined effects of a charged particle's energization at an interplanetary shock and propagation to a satellite-borne particle detector at the obsevation point, is described and the trajectory results examined. A charged particle's adiabatic motion is assumed to be scatter-free along the laminar spiral interplanetary magnetic field (IMF). The interplanetary shock wave is taken as a sun-centered sperical surface that expands radially outward. The plasma and field changes across the shock obey the jump conditions for a fast mode magnetohydrodynamic (MHD) shock wave. For a chosen shock model, a particle of specified observed kinetic energy and pitch angle at a given observation time and fixed observation point is followed numerically backward in time through the IMF and shock wave. The shock interaction is treated by solving the particle's exact orbit equations through the locally planar MHD shock discontinuity.

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