Details

Autor(en) / Beteiligte

• Polz, J
• Robinson, A P L
• Kalinin, A
• Becker, G A
• Fraga, R A Costa
• Hellwing, M
• Hornung, M
• Keppler, S
• Kessler, A
• Klöpfel, D
• Liebetrau, H
• Schorcht, F
• Hein, J
• Zepf, M
• Grisenti, R E
• Kaluza, M C

Titel

Efficient Laser-Driven Proton Acceleration from a Cryogenic Solid Hydrogen Target

Ist Teil von

• Scientific reports, 2019-11, Vol.9 (1), p.16534-8, Article 16534

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2019

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• 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.