Comparison of Linear and Quadratic Chirp in Beat Wave Acceleration in Vacuum

Abstract

Abstract Electron acceleration due to beating of two slightly different frequency LP (Linearly polarised) laser pulses with finite spot size in a vacuum has been studied. In this scheme, two lasers are incident at a point with some angle, due to beating of LP lasers constructive interference occurs. The resultant electric and magnetic field of this constructive interference helps in acceleration of pre-accelerated electron which is injected and trapped by the field. In this paper, we have seen the effect of linear and quadratic chirp on laser beat wave acceleration in vacuum and a comparison between the two is made for effective energy gain.