Efficient laser-driven proton acceleration from a cryogenic solid hydrogen target
| Autor: | Matthew Zepf, Alexander Robinson, Marco Hornung, Frank Schorcht, Hartmut Liebetrau, J. Polz, Sebastian Keppler, Joachim Hein, Robert E. Grisenti, G. A. Becker, R. A. Costa Fraga, A. Kalinin, Malte C. Kaluza, Diethard Klöpfel, Alexander Kessler, M. Hellwing |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Proton lcsh:Medicine Kinetic energy 01 natural sciences 7. Clean energy Article 010305 fluids & plasmas law.invention Protein filament Acceleration Solid hydrogen law 0103 physical sciences ddc:530 lcsh:Science 010306 general physics Multidisciplinary lcsh:R Energy conversion efficiency Solid angle Laser-produced plasmas Laser lcsh:Q Atomic physics ddc:600 Plasma-based accelerators |
| Zdroj: | Scientific Reports Scientific reports 9(1), 16534 (2019). doi:10.1038/s41598-019-52919-7 Scientific Reports, Vol 9, Iss 1, Pp 1-8 (2019) |
| DOI: | 10.1038/s41598-019-52919-7 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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