Enhancement of laser-driven ion acceleration in non-periodic nanostructured targets
Artikel i vetenskaplig tidskrift, 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

Författare

Julien Ferri

Chalmers, Fysik, Subatomär fysik och plasmafysik

Illia Thiele

Chalmers, Fysik, Subatomär fysik och plasmafysik

E. Siminos

Göteborgs universitet

L. Gremillet

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

E. Smetanina

Göteborgs universitet

A. Dmitriev

Göteborgs universitet

G. Cantono

Lunds universitet

C-G Wahlstrom

Lunds universitet

Tünde Fülöp

Subatomär, högenergi- och plasmafysik

Journal of Plasma Physics

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

Vol. 86 1 905860101

Ämneskategorier

Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1017/S0022377819000898

Mer information

Senast uppdaterat

2020-03-26