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- Title
Enhancement of laser-driven ion acceleration in non-periodic nanostructured targets.
- Authors
Ferri, J.; Thiele, I.; Siminos, E.; Gremillet, L.; Smetanina, E.; Dmitriev, A.; Cantono, G.; Wahlström, C.-G.; Fülöp, T.
- Abstract
Using particle-in-cell simulations, we demonstrate an improvement of the target-normal-sheath acceleration (TNSA) of protons in non-periodically nanostructured targets with micron-scale thickness. Compared to standard flat foils, an increase in the proton cutoff energy by up to a factor of two is observed in foils coated with nanocones or perforated with nanoholes. The latter nano-perforated foils yield the highest enhancement, which we show to be robust over a broad range of foil thicknesses and hole diameters. The improvement of TNSA performance results from more efficient hot-electron generation, caused by a more complex laser–electron interaction geometry and increased effective interaction area and duration. We show that TNSA is optimized for a nanohole distribution of relatively low areal density and that is not required to be periodic, thus relaxing the manufacturing constraints.
- Subjects
PARTICLE beams; PROTONS; IONS; MAGNETIC recorders &; recording
- Publication
Journal of Plasma Physics, 2020, Vol 86, Issue 1, p1
- ISSN
0022-3778
- Publication type
Article
- DOI
10.1017/S0022377819000898