Fig. 2: Simulation results of positrons’ acceleration process.
From: Driving positron beam acceleration with coherent transition radiation
a Positron beam density, b phase-space density of positrons, c longitudinal electric field Ex, and d transverse field at 4, 40, and 400 mm, respectively. The blue solid line in a represents transverse field at x = 4.01, 40.01, and 400.01 mm (denoted by the blue dashed line). The red solid line in b represents the on-axis longitudinal electric field. The longitudinal and transverse electric fields at 40 mm and 400 mm have been multiplied by four times and ten times, respectively. Simulation results at the beginning are shown in Supplementary Fig. 1 and Supplementary Note 1.
