%0 Journal Article
%A Polz, J.
%A Robinson, A. P. L.
%A Kalinin, A.
%A Becker, G. A.
%A Fraga, R. A. Costa
%A Hellwing, M.
%A Hornung, M.
%A Keppler, S.
%A Kessler, A.
%A Klöpfel, D.
%A Liebetrau, H.
%A Schorcht, F.
%A Hein, J.
%A Zepf, M.
%A Grisenti, R. E.
%A Kaluza, M. C.
%T Efficient Laser-Driven Proton Acceleration from a Cryogenic Solid Hydrogen Target
%J Scientific reports
%V 9
%N 1
%@ 2045-2322
%C [London]
%I Macmillan Publishers Limited, part of Springer Nature
%M GSI-2019-01161
%P 16534
%D 2019
%Z This article is licensed under a Creative Commons Attribution 4.0 InternationalLicense, which permits use, sharing, adaptation, distribution and reproduction in any medium orformat, as long as you give appropriate credit to the original author(s) and the source, provide a link to the CreativeCommons license, and indicate if changes were made. The images or other third party material in thisarticle are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to thematerial. If material is not included in the article’s Creative Commons license and your intended use is not permittedby statutory regulation or exceeds the permitted use, you will need to obtain permission directly from thecopyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
%X We report on the successful implementation and characterization of a cryogenic solid hydrogen target in experiments on high-power laser-driven proton acceleration. When irradiating a solid hydrogen filament of 10 μm diameter with 10-Terawatt laser pulses of 2.5 J energy, protons with kinetic energies in excess of 20 MeV exhibiting non-thermal features in their spectrum were observed. The protons were emitted into a large solid angle reaching a total conversion efficiency of several percent. Two-dimensional particle-in-cell simulations confirm our results indicating that the spectral modulations are caused by collisionless shocks launched from the surface of the the high-density filament into a low-density corona surrounding the target. The use of solid hydrogen targets may significantly improve the prospects of laser-accelerated proton pulses for future applications.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:31712576
%U <Go to ISI:>//WOS:000495613400017
%R 10.1038/s41598-019-52919-7
%U https://repository.gsi.de/record/220376