The interaction of oblique chorus waves and energetic electrons

The interaction of chorus waves with energetic electrons is investigated using test particle simulation, for two cases respectively, one with an assumption of parallel propagation along a dipole field line, and the other one with a more physical wave propagation in the dipole field. For the latter case, ray tracing of many waves is used to reconstruct the spatial and temporal variation of electromagnetic field of chorus elements. Substantial differences in electron transport are found and signatures of electron precipitation pattern induced by the chorus waves are predicted. Different from the first case, higher order cyclotron resonances associated with chorus wave obliqueness are enabled for the second case, which may account for the precipitation of relativistic electrons. The results would be very important to understand the variability of relativistic electron microbursts.