Highly collimated intense radiation from electron collisions with a tightly focused linearly polarized laser pulse

Abstract

The use of high-energy radiation generated by electron collisions with a laser pulse is an effective method to treat cancer. In this paper, the spatial properties of radiation produced by electron collisions with a tightly focused linearly polarized laser pulse are investigated. Theoretical derivations and numerical simulations within the framework of classical electrodynamics show that the stronger the laser intensity, the higher the initial electron energy, and the longer the laser pulse, which can produce greater radiation power. An increase in the laser intensity expands the range of electron radiation and therefore reduces the collimation of the radiation. The collimation in the radiation is better when colliding with an electron of higher initial energy. The phenomenon that the radiated power of the electron varies periodically with the initial phase of the laser is also found. The results of this paper have important implications to produce strongly radiating and highly collimated rays.

Study of the process of tightly focused linearly polarized laser pulses interacting with a stationary single electron

“…Li et al investigated the distribution of radiated power after the collision of linearly polarized laser pulses with a single electron [29], and Li pointed out that in the spatial distribution of the maximum radiated power, the more the range of distribution converges, the better the collimation is. In other words, the more the radiated power is focused in one direction, the better the collimation of the radiation.…”