Journal
PLASMA PHYSICS AND CONTROLLED FUSION
Volume 50, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0741-3335/50/12/124033
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The future applications of the short-duration, multi-MeV ion beams produced in the interaction of high-intensity laser pulses with solid targets will require improvements in the conversion efficiency, peak ion energy, beam monochromaticity and collimation. Regimes based on radiation pressure acceleration (RPA) might be the dominant ones at ultrahigh intensities and most suitable for specific applications. This regime may be reached with present-day intensities using circularly polarized (CP) pulses thanks to the suppression of fast electron generation, so that RPA dominates over sheath acceleration at any intensity. We present a brief review of a previous work on RPA with CP pulses and a few recent results. Parametric studies in one dimension were performed to identify the optimal thickness of foil targets for RPA and to study the effect of a short-scalelength preplasma. Three-dimensional simulations show the importance of 'flat-top' radial intensity profiles to minimize the rarefaction of thin targets and address the issue of angular momentum conservation and absorption.
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