Enhancing electron acceleration efficiency with Sinh-Gaussian laser beams and magnetic wigglers in vacuum

The energy efficiency of electron acceleration in a vacuum can be improved by incorporating external magnetic fields, frequency chirping, and other techniques. In this study, we applied a wiggler magnetic field in conjunction with a propagating Sinh-Gaussian laser pulse. We analytically examined the influence of the laser's electric field, a decentered parameter, and the characteristics of the wiggler magnetic field on electron acceleration. Our findings show a positive correlation between the electron's relativistic factor and the laser’s electric field, the decentered parameter, and the amplitude of the wiggler magnetic field (chosen range 10.1 Tesla to 40.4 Tesla). We found that the inequality between the wiggler's propagation constant and the laser pulse's propagation constant is crucial for enhancing electron energy gain. By selecting appropriate parameters, we successfully increased the electron energy to 1.51 GeV. This research contributes to developing more energy-efficient electron acceleration methods in a vacuum.