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Efficient Laser-Driven Proton Acceleration from a Cryogenic Solid Hydrogen Target
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DOI：10.1038/s41598-019-52919-7.png)
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摘要
En 中文
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 mu m 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.
Keyword:
PLASMA
GENERATION
EMISSION
PULSES
BEAMS
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3.9
论文数:
27.9W
被引数:
83.5W
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