Fig. 3: Comparison of simulation results with theory.
From: Driving positron beam acceleration with coherent transition radiation
a Simulation results of longitudinal electric field at x ~ 0.16 mm. b Longitudinal Coulomb field calculated by first term of Eq. (1). c Longitudinal coherent transition radiation (CTR) field calculated by second term of Eq. (1). d Simulation results of transverse electric field at x ~ 0.16 mm. e, f The first and second terms of Eq. (2), representing the transverse Coulomb field and transverse CTR field, respectively. g Theoretical (blue solid circle) and simulation (red square) results of the maximum on-axis value of the longitudinal electric field at different times.
