http://arxiv.org/abs/2111.06341
Effects of increasing whistler amplitude and propagation angle are studied through a variational test particle simulation and calculations of the resonance width. While high amplitude and oblique whistlers in typical 1 AU solar wind parameters are capable of forming an isotropic population without any additional processes, anomalous interactions with quasi-parallel whistlers are essential for the process of halo formation near the Sun. Without high amplitude and quasi-parallel whistlers, strahl electrons cannot be scattered to low velocities (less than the wave phase velocity) to form a halo population. We also present in detail a careful treatment of errors in phase space volume, which is necessary for numerical calculations when the motion is highly stochastic due to resonant interactions with large amplitude waves. These calculations of errors have a wide application in both PIC and test particle simulations.
T. Vo, R. Lysak and C. Cattell
Fri, 12 Nov 21
51/53
Comments: 11 pages, 5 figures, submitted to Physics of Plasmas