Quasi-neutrality of the relativistic laser-driven proton beam

Abstract

Computational and theoretical study of the dynamics of the formation of a quasi-neutral proton beam propagating from the rear surface of an aluminum target under the action of super-intense laser pulse is presented. It is shown that total time to establish the quasi-neutrality of the proton beam is about two laser pulse durations. The calculated values of the effective temperature and the number of fast protons are close to the experimental results1.