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

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.
Authors:
 [1] ;  [2] ; ;  [3] ; ; ;  [1] ; ; ;  [4] ;  [1] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Center for Energy Research, University of California, 9500 Gilman Drive, La Jolla, California 92093 (United States)
  2. (Italy)
  3. Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States)
  4. University of Michigan, 2200 Bonisteel Blvd. Ann Arbor, Michigan 48109 (United States)
  5. (United States)
  6. Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence (France)
  7. Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano (Italy)
  8. General Atomics, 3550 General Atomics Court, San Diego, California 92121 (United States)
Publication Date:
OSTI Identifier:
22218126
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 5; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CONVERSION; EFFICIENCY; ELECTRONS; INERTIAL CONFINEMENT; LASERS; PLASMA SIMULATION; PROTON BEAMS; PROTONS