Enhancement of laser-driven ion acceleration in non-periodic nanostructured targets

J. Ferri, I. Thiele, E. Siminos, L. Gremillet, E. Smetanina, A. Dmitriev, G. Cantono, C. G. Wahlström, T. Fülöp

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review


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.

TidskriftJournal of Plasma Physics
Tidigt onlinedatum2019
StatusPublished - 2020 feb.

Ämnesklassifikation (UKÄ)

  • Fusion, plasma och rymdfysik


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