3D Test-particle Simulation and Global ULF Mode Structure Analysis of the 17 March, 2015 CME-shock Driven Storm

Abstract:

3D test-particle simulation of energetic electrons (hundreds of keV to MeV), including both an initially trapped population and continuously injected population, driven by the Lyon-Fedder-Mobarry global MHD model coupled with the Rice Convection Model (RCM), is performed for the March 17, 2015 storm. The electron trajectories are calculated and weighted using the ESA model. The simulated flux is compared with Van Allen Probe measurements. We analyzed the ULF wave activity by doing Fourier transform on MHD fields in both the azimuthal direction to obtain the azimuthal mode structure and in time domain at each individual mode number to get the amplitude of the frequency that can resonate with MeV electrons. The two techniques are combined together to study the effect of ULF waves on relativistic electron radial transport.