Double-relativistic-electron-shell laser proton acceleration

TL;DR

This paper proposes a novel laser-proton acceleration structure using two relativistic electron shells, achieving high-energy, monoenergetic proton and electron beams at high laser intensities, advancing laser-driven particle acceleration techniques.

Contribution

It introduces a new acceleration scheme with two relativistic electron shells that produces high-quality proton and electron beams at ultra-high laser intensities.

Findings

Achieved several GeV energy distribution for protons.

Generated monoenergetic hundreds-of-MeV proton beams.

Produced monoenergetic electron beams with hundreds of MeV energy.

Abstract

A new laser-proton acceleration structure combined by two relativistic electron shells, a suprathermal electron shell and a thermal electron cloud is proposed for $a\gtrapprox80\sigma_0$, where a is the normalized laser field and $\sigma_0$ is the normalized plasma surface density. In the new region, a uniform energy distribution of several GeV and a monoenergetic hundreds-of-MeV proton beam have been obtained for $a=39.5$. The first relativistic electron shell maintains opaque for incident laser pulse in the whole process. A monoenergetic electron beam has been generated with energy hundreds of MeV and charge of hundreds of pC. It is proposed a stirring solution for relativistic laser-particle acceleration.