Effect of different Gaussian-like laser profiles on electron energy gain in laser wakefield acceleration

Laser wakefield acceleration (LWFA) of electrons is a highly promising and advanced technique within the field of laser plasma physics, which enables the generation of remarkably high-energy electron beams over a comparatively short distance. In this paper, we have used different Gaussian-like laser pulse profiles of the same amplitude of electric field and laser intensity in magnetized plasma. Generated wakefield and energy gain are calculated analytically by using equation of motion and Maxwell’s equation. Our results show that generated wakefield and energy gain are greatly affected by the shape of laser electric field profile. Pulse with broader electric field profile produces more effective LWFA under identical conditions of other parameters. Energy gain by electrons increases slightly with increase in the strength of external magnetic field. Results show that for the broadest laser profile, the magnetic field has more influence on wakefield production and electron energy gain. The role of laser pulse length is also analyzed. In this study, we have obtained a maximum of 151.6 MeV energy gain with experimentally feasible parameters. Our findings will assist researchers in selecting the most energy-efficient pulse profile for LWFA.