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Improved laser-to-proton conversion efficiency in isolated reduced mass targets

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  • A. Morace
  • C. Bellei
  • T. Bartal
  • L. Willingale
  • J. Kim
  • A. Maksimchuk
  • K. Krushelnick
  • M. S. Wei
  • P. K. Patel
  • D. Batani
  • N. Piovella
  • R. B. Stephens
  • F. N. Beg
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Article number054102
<mark>Journal publication date</mark>29/07/2013
<mark>Journal</mark>Applied Physics Letters
Issue number5
Volume103
Number of pages5
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present experimental results of laser-to-proton conversion efficiency as a function of lateral confinement of the refluxing electrons. Experiments were carried out using the T-Cubed laser at the Center for Ultrafast Optical Science, University of Michigan. We demonstrate that the laser-to-proton conversion efficiency increases by 50% with increased confinement of the target from surroundings with respect to a flat target of the same thickness. Three-dimensional hybrid particle-in-cell simulations using LSP code agree with the experimental data. The adopted target design is suitable for high repetition rate operation as well as for Inertial Confinement Fusion applications. (C) 2013 AIP Publishing LLC.