Journal Article

GSI-2019-01161

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Efficient Laser-Driven Proton Acceleration from a Cryogenic Solid Hydrogen Target

Polz, J. ; Robinson, A. P. L. ; Kalinin, A. ; Becker, G. A. ; Fraga, R. A. C. ; Hellwing, M. ; Hornung, M.GSI* ; Keppler, S.GSI*HIJ* ; Kessler, A.GSI* ; Klöpfel, D.GSI*HIJ* ; Liebetrau, H. ; Schorcht, F.GSI* ; Hein, J.GSI*HIJ* ; Zepf, M.GSI*HIJ* ; Grisenti, R. E.GSI* ; Kaluza, M. C. (Corresponding author)GSI*HIJ*

2019
Macmillan Publishers Limited, part of Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41598-019-52919-7  doi:10.15120/GSI-2019-01161

Abstract: 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.

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Contributing Institute(s):

1. Atomphysik (ATP)
2. HI Jena (HIJ)

Research Program(s):

1. 631 - Accelerator R & D (POF3-631) (POF3-631)
2. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)
3. LASERLAB-EUROPE - The Integrated Initiative of European Laser Research Infrastructures (654148) (654148)

Appears in the scientific report 2019

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