Orateur
Description
Field line random walk (FLRW) is an essential process involved in charged particle transport, especially cosmic rays (CRs). In general, CR can jump from one FL to another due to scattering processes or because of the finite size of their gyro-motion. However, when the Larmor radius is sufficiently small, CRs tend to move along magnetic FLs for a certain amount of time between scattering events. Thus, how turbulence shapes magnetic field transport strongly constrains the propagation of CRs.
Using high precision polarized synthetic turbulence simulations, we study FL transport in Alfvén-like and magnetosonic-like polarized turbulence where polarisation configurations are inspired by linearized ideal MHD modes. We show remarkably different transport behaviors with respect to random polarisation. It consequently influences CR diffu