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

  • J. Ferri (a1), I. Thiele (a1), E. Siminos (a2), L. Gremillet (a3), E. Smetanina (a2), A. Dmitriev (a2), G. Cantono (a4), C.-G. Wahlström (a4) and T. Fülöp (a1)...

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.

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Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Corresponding author

Email addresses for correspondence: julien.ferri@chalmers.se, illia-thiele@web.de

References

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Keywords

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

  • J. Ferri (a1), I. Thiele (a1), E. Siminos (a2), L. Gremillet (a3), E. Smetanina (a2), A. Dmitriev (a2), G. Cantono (a4), C.-G. Wahlström (a4) and T. Fülöp (a1)...

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