Demonstration of charged-particle tracing in an MHD simulation. The background fluid state is taken from Sect. 4.2.2 and kept fixed while several charged particles are traced (red lines in the top-left panel) by numerically solving the equations of motion. Selected zoomed-in trajectories (top-right, bottom-left, and bottom-right panels) show the typical oscillatory and drift motion of charged particles around and across magnetic field lines. An animation is provided online.