Electron acceleration in collisionless plasma: comparative analysis of laser wakefield acceleration using Gaussian and cosh-squared-Gaussian laser pulses

The properties of the wakefield and the resulting accelerated particle bunch are significantly influenced by the pulse profile of the driving laser. The current research investigates the intricate connection that exists between the pulse profile of the laser and the subsequent acceleration of electrons during the process known as laser wakefield acceleration (LWFA). A theoretical comparison of the acceleration of electrons in laser wakefield acceleration using Gaussian and cosh-squared-Gaussian laser pulses is the focus of this article. For both of the pulses, analytical formulas are obtained for the generated laser wake potential, wakefield, and energy gain. Comparisons are made between the various numerical values of these quantities that correlate to various parameters. According to the findings we obtained, the cosh-squared-Gaussian (csG) pulse possesses a unique intensity profile that has been flattened, which allows it to successfully accelerate electrons. A maximum energy increase of 5.19 GeV can be achieved by employing a csG laser pulse with parameters that are amenable to experimentation. By analyzing the impacts of various types of laser pulses, the purpose of this research is to provide a thorough knowledge of the fundamental concepts behind laser wakefield acceleration.