Laser-driven proton acceleration enhancement by nanostructured foils

D. Margarone*, O. Klimo, I. J. Kim, J. Prokůpek, J. Limpouch, T. M. Jeong, T. Mocek, J. Pkal, H. T. Kim, J. Proka, K. H. Nam, L. Tolcová, I. W. Choi, S. K. Lee, J. H. Sung, T. J. Yu, G. Korn

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

152 Citations (Scopus)

Abstract

Nanostructured thin plastic foils have been used to enhance the mechanism of laser-driven proton beam acceleration. In particular, the presence of a monolayer of polystyrene nanospheres on the target front side has drastically enhanced the absorption of the incident 100TW laser beam, leading to a consequent increase in the maximum proton energy and beam charge. The cutoff energy increased by about 60% for the optimal spheres' diameter of 535nm in comparison to the planar foil. The total number of protons with energies higher than 1MeV was increased approximately 5 times. To our knowledge this is the first experimental demonstration of such advanced target geometry. Experimental results are interpreted and discussed by means of 212-dimensional particle-in-cell simulations.

Original languageEnglish
Article number234801
JournalPhysical Review Letters
Volume109
Issue number23
DOIs
Publication statusPublished - 03 Dec 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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