Supplemental video 3

Animated version of the Figure 6. Trajectories of a small sample of the positrons at the final stage of the interaction. The circle markers correspond to the current position of the particles and the colored lines correspond to positions over the previous 10 femtoseconds. The angle φ corresponds to the angle of the particle position vector measured in the yz-plane closckwise. Black dashed line corresponds to the time at which the trajectories are plotted. Trajectories of three positrons are highlighted with with dark blue and dark green color.