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Enhanced target normal sheath acceleration using colliding laser pulses

Journal article
Authors J. Ferri
Evangelos Siminos
T. Fülöp
Published in Communications Physics
Volume 2
Publication year 2019
Published at Department of Physics (GU)
Language en
Links doi.org/10.1038/s42005-019-0140-x
Subject categories Physical Sciences

Abstract

Laser-solid interaction can lead to the acceleration of protons to tens of MeV. Here, we show that a strong enhancement of this acceleration can be achieved by splitting the laser pulse to two parts of equal energy and opposite incidence angles. Through the use of two- and three-dimensional Particle-In-Cell simulations, we find that the multi-pulse interaction leads to a standing wave pattern at the front side of the target, with an enhanced electric field and a substantial modification of the hot electron generation process. This in turn leads to significant improvement of the proton spectra, with an almost doubling of the accelerated proton energy and five-fold enhancement of the number of protons. The proposed scheme is robust with respect to incidence angles for the laser pulses, providing flexibility to the scheme, which should facilitate its experimental implementation.

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