[PEM19-P01] Numerical simulation on energetic electron precipitations by chorus waves
As the wave amplitude increases, the pitch angle of the electrons is scattered by the non-resonant interaction due to the influence of the wave magnetic field. We discriminate of resonant and non-resonant electron population, and investigate the amplitude dependence of precipitating electron counts for two populations. A positive correlation was found between the wave intensity and precipitating counts of resonant electron when the wave amplitudes are smaller than 10^-4 of the ambient magnetic fields.. When the wave intensity becomes large, precipitating counts of resonant electrons decrease. The parameter ρ (e.g., Saito et al., 2016) has used as a proxy to discriminate different interaction processes among diffusion, phase trapping and dislocation. Note that a positive correlation between the wave intensity and precipitating counts of resonant electrons are violated despite of small ρ(<1), i.e., diffusive interactions. Simultaneously, precipitating counts of non-resonant electrons increases, indicating that non-resonant interactions contribute to precipitation of electrons.