Modeling advective transport of radiation belt electrons

Abstract The relativistic electron dynamics in the radiation belts falls into two categories: diffusive processes, which particles are scattered randomly, and advective collectively driven one direction energy or space. In this work, we focus on advection can occur a timescale faster than diffusion for CME shock compressions of dayside magnetosphere. Test-particle simulations done electric magnetic fields generated by LFM global MHD model, coefficient is calculated. Then, applied to transport equation with term included solved phase space density time evolution. calculation 17 March 2015 6–7 September 2017 CME-shock events, using realistic initial conditions measured Van Allen Probes, all showing inward motion electrons scale minutes. result compared calculated based full test-particle fields. shift found be comparable both methods, while solving much once coefficients modeled.