Laser wakefield acceleration of electrons using Bessel-Gauss doughnut beams for accelerating beam guiding

A high-intensity laser pulse propagating through a gas target disturbs the uniform plasma distribution. Plasma density structures, created by high-order Bessel-Gauss beams for guiding the accelerating Gaussian beam and laser wakefield acceleration of electrons, are analysed using Wake-T and Fourier-Bessel particle-in-cell (FBPIC) simulation tools. The use of Bessel-Gauss doughnut beams increases the acceleration distance and energy of accelerated electrons up to 2.3 times at a 2 mm distance relative to the Gaussian beam of the same intensity.