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Title:
Analytical estimates of proton acceleration in laser-produced turbulent plasmas
Authors:
Beyer, Konstantin A.; Reville, Brian; Bott, Archie F. A.; Park, Hye-Sook; Sarkar, Subir; Gregori, Gianluca
Affiliation:
AA(Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK), AB(School of Mathematics and Physics, Queens University Belfast, Belfast BT7 1NN, UK), AC(Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK), AD(Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA), AE(Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK), AF(Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK)
Publication:
Journal of Plasma Physics, Volume 84, Issue 6, article id. 905840608, 12 pp.
Publication Date:
12/2018
Origin:
CUP
Keywords:
astrophysical plasmas
Abstract Copyright:
(c) 2018: © Cambridge University Press 2018
DOI:
10.1017/S0022377818001149
Bibliographic Code:
2018JPlPh..84f9008B

Abstract

With the advent of high power lasers, new opportunities have opened up for simulating astrophysical processes in the laboratory. We show that second-order Fermi acceleration can be directly investigated at the National Ignition Facility, Livermore. This requires measuring the momentum-space diffusion of 3 MeV protons produced within a turbulent plasma generated by a laser. Treating Fermi acceleration as a biased diffusion process, we show analytically that a measurable broadening of the initial proton distribution is then expected for particles exiting the plasma.
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