Single scattering test. Within the deflection set-up (see Sect. A), we restrict the beam particles to undergo just one single scattering throughout the entire simulation, and let it run until all beam particles have scattered once. The solid line corresponds to the hSIDM implementation (which is essentially the anisotropic rSIDM case since we set θ_c = 0 here) while the dashed line corresponds to the theoretical prediction. The colours represent the scattering model we use: Møller (green), Rutherford (blue) and isotropic (red).