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


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2017-12

AUTHORS

Dimitri Khaghani, Mathieu Lobet, Björn Borm, Loïc Burr, Felix Gärtner, Laurent Gremillet, Liana Movsesyan, Olga Rosmej, Maria Eugenia Toimil-Molares, Florian Wagner, Paul Neumayer

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. More... »

PAGES

11366

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-017-11589-z

DOI

http://dx.doi.org/10.1038/s41598-017-11589-z

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1091576114

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/28900164


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