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Title: Temporal narrowing of neutrons produced by high-intensity short-pulse lasers

The production of neutron beams having short temporal duration is studied using ultraintense laser pulses. Laser-accelerated protons are spectrally filtered using a laser-triggered microlens to produce a short duration neutron pulse via nuclear reactions induced in a converter material (LiF). This produces a ~3 ns duration neutron pulse with 104 n/MeV/sr/shot at 0.56 m from the laser-irradiated proton source. The large spatial separation between the neutron production and the proton source allows for shielding from the copious and undesirable radiation resulting from the laser-plasma interaction. Finally, this neutron pulse compares favorably to the duration of conventional accelerator sources and should scale up with, present and future, higher energy laser facilities to produce brighter and shorter neutron beams for ultrafast probing of dense materials.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [3] ;  [7] ;  [10] ;  [6] ;  [8] ;  [3] ;  [11]
  1. UMR 7605 CNRS-CEA-Ecole Polytechnique-Univ. Paris VI, Palaiseau (France); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. UMR 7605 CNRS-CEA-Ecole Polytechnique-Univ. Paris VI, Palaiseau (France); Univ. di Roma "La Sapienza", Roma (Italy)
  3. IFIN-HH (Romania)
  4. Univ. di Roma "La Sapienza", Roma (Italy); INRS-EMT, Varennes, QC (Canada); Istituto Nazionale di Fisica Nucleare, Frascati (Italy)
  5. The Queen's Univ. of Belfast, Belfast (United Kingdom); Institute of Physics of the ASCR, Prague (Czech Republic)
  6. Heinrich Heine Univ. Dusseldorf, Dusseldorf (Germany)
  7. UMR 7605 CNRS-CEA-Ecole Polytechnique-Univ. Paris VI, Palaiseau (France)
  8. The Queen's Univ. of Belfast, Belfast (United Kingdom)
  9. Univ. di Roma "La Sapienza", Roma (Italy)
  10. Institute of Applied Physics, Nizhny Novgorod (Russia)
  11. UMR 7605 CNRS-CEA-Ecole Polytechnique-Univ. Paris VI, Palaiseau (France); Institute of Applied Physics, Nizhny Novgorod (Russia)
Publication Date:
Report Number(s):
LLNL-JRNL-674350
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
AC52-07NA27344; E1127; 284464; 001528; PN-II-ID-JRP-2011-1
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION
OSTI Identifier:
1345339
Alternate Identifier(s):
OSTI ID: 1203808