TU Darmstadt / ULB / TUbiblio

Enhancing laser-driven proton acceleration by using micro-pillar arrays at high drive energy

Khaghani, Dimitri ; Lobet, Mathieu ; Borm, Björn ; Burr, Loïc ; Gärtner, Felix ; Gremillet, Laurent ; Movsesyan, Liana ; Rosmej, Olga ; Toimil-Molares, Maria Eugenia ; Wagner, Florian ; Neumayer, Paul (2017):
Enhancing laser-driven proton acceleration by using micro-pillar arrays at high drive energy.
In: Scientific Reports, 7 (1), Nature, ISSN 2045-2322,
DOI: 10.1038/s41598-017-11589-z,
[Article]

Abstract

The interaction of micro- and nano-structured target surfaces with high-power laser pulses is being widely investigated for its unprecedented absorption efficiency. We have developed vertically aligned metallic micro-pillar arrays for laser-driven proton acceleration experiments. We demonstrate that such targets help strengthen interaction mechanisms when irradiated with high-energy-class laser pulses of intensities ~1017–18 W/cm2. In comparison with standard planar targets, we witness strongly enhanced hot-electron production and proton acceleration both in terms of maximum energies and particle numbers. Supporting our experimental results, two-dimensional particle-in-cell simulations show an increase in laser energy conversion into hot electrons, leading to stronger acceleration fields. This opens a window of opportunity for further improvements of laser-driven ion acceleration systems.

Item Type: Article
Erschienen: 2017
Creators: Khaghani, Dimitri ; Lobet, Mathieu ; Borm, Björn ; Burr, Loïc ; Gärtner, Felix ; Gremillet, Laurent ; Movsesyan, Liana ; Rosmej, Olga ; Toimil-Molares, Maria Eugenia ; Wagner, Florian ; Neumayer, Paul
Title: Enhancing laser-driven proton acceleration by using micro-pillar arrays at high drive energy
Language: English
Abstract:

The interaction of micro- and nano-structured target surfaces with high-power laser pulses is being widely investigated for its unprecedented absorption efficiency. We have developed vertically aligned metallic micro-pillar arrays for laser-driven proton acceleration experiments. We demonstrate that such targets help strengthen interaction mechanisms when irradiated with high-energy-class laser pulses of intensities ~1017–18 W/cm2. In comparison with standard planar targets, we witness strongly enhanced hot-electron production and proton acceleration both in terms of maximum energies and particle numbers. Supporting our experimental results, two-dimensional particle-in-cell simulations show an increase in laser energy conversion into hot electrons, leading to stronger acceleration fields. This opens a window of opportunity for further improvements of laser-driven ion acceleration systems.

Journal or Publication Title: Scientific Reports
Journal volume: 7
Number: 1
Publisher: Nature
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 29 Dec 2017 12:02
DOI: 10.1038/s41598-017-11589-z
Official URL: https://doi.org/10.1038/s41598-017-11589-z
Funders: We acknowledge PRACE for awarding us access to TGCC/Curie (Grant No. 2014112576).
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details