Control of energy distribution of the proton beam with an oblique incidence of the laser pulse

TL;DR

This paper demonstrates how adjusting the laser irradiation position and target parameters in oblique laser-proton interactions can effectively control the proton beam energy distribution, leading to higher quality proton beams.

Contribution

It introduces a method to control proton energy spread by optimizing laser incidence position and target configuration in 3D PIC simulations.

Findings

Proton energy spread varies with laser irradiation position.

Optimal target positioning minimizes proton energy spread.

Adjusting target size and position enhances high-energy proton quality.

Abstract

We investigate proton acceleration by a laser pulse obliquely incident on a double layer target via 3D PIC simulations. It is found that the proton beam energy spread changes by the laser irradiation position and it reaches a minimum at certain position. This provides a way to control the proton energy spectrum. We show that by appropriately adjusting the size and position of the second proton layer that high energy protons with much smaller energy spread can be obtained.