The Effect of Chirped Gaussian Laser Pulse on the Acceleration of Plasma Electrons in a Plasma Wakefield Accelerator in the Presence of a Planar Undulator Field

Abstract

Improving the acceleration process in a very compact structure by using laser-plasma interactions has attracted various researchers’ attention in recent years. Novel ideas, technologies, and comprehensive development in the relevant physics enabled the expansion of plasma wakefield accelerators. In this study, the energy gain and acceleration of electrons in the plasma medium have been investigated through the wakefield generated by a chirped Gaussian laser pulse in the presence of a planar magnetic undulator field. The fourth-order Runge–Kutta method was applied to simulate the wakefield and to determine the electron energy gain. In order to improve the oscillatory velocity of electrons in a laser-plasma accelerator, a planar undulator magnetic field was used. The numerical results indicated that with increasing undulator field strength, the wakefield amplitude and the electron energy gain increased noticeably. In addition, increasing the undulator wavelength for constant values of the undulator field strength leads to an increase in the wakefield amplitude and electron energy gain. Further results revealed an optimized value of chirped parameter, in which the wakefield amplitude and the electron energy gain could be maximum.