Fig. 2: Charge distribution characterization.
From: Unforeseen advantage of looser focusing in vacuum laser acceleration
Angularly resolved charge distributions of electrons in units of pC/sr, for the cases of focusing by f#1 (a, c, e) and f#3 (b, d, f) optics. Electrons with measured energy above 130 keV are shown in a, b, and above 2.5 MeV in c, d. Distributions of electrons from simulation results with energies above 100 keV are shown in e, f. Experimental results [(a) to (d)] are averaged over a number of shots. Vertical dashed lines in c to f indicate the peak positions of the experimental electron distribution.
