Enhancement of laser-driven ion acceleration in non-periodic nanostructured targets
Journal article, 2020

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.

intense particle beams

plasma simulation

Author

Julien Ferri

Chalmers, Physics, Subatomic and Plasma Physics

Illia Thiele

Chalmers, Physics, Subatomic and Plasma Physics

E. Siminos

University of Gothenburg

L. Gremillet

The French Alternative Energies and Atomic Energy Commission (CEA)

E. Smetanina

University of Gothenburg

A. Dmitriev

University of Gothenburg

G. Cantono

Lund University

C-G Wahlstrom

Lund University

Tünde Fülöp

Subatomic, High Energy and Plasma Physics

Journal of Plasma Physics

0022-3778 (ISSN) 1469-7807 (eISSN)

Vol. 86 1 905860101

Subject Categories

Accelerator Physics and Instrumentation

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1017/S0022377819000898

More information

Latest update

3/26/2020