Neutron imaging with the short-pulse laser driven neutron source at the Trident laser facility

DOI PDF Web Site 被引用文献3件
  • N. Guler
    Spectral Sciences 1 , 4 Fourth Avenue, Burlington, Massachusetts 01803, USA
  • P. Volegov
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • A. Favalli
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • F. E. Merrill
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • K. Falk
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • D. Jung
    Axis Communications AB 4 , SE-223 69 Lund, Sweden
  • J. L. Tybo
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • C. H. Wilde
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • S. Croft
    Oak Ridge National Laboratory 5 , Oak Ridge, Tennessee 37831, USA
  • C. Danly
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • O. Deppert
    Institut für Kernphysik 6 , Technische Universität Darmstadt, 64289 Darmstadt, Germany
  • M. Devlin
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • J. Fernandez
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • D. C. Gautier
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • M. Geissel
    Sandia National Laboratories 7 , Albuquerque, New Mexico 87185, USA
  • R. Haight
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • C. E. Hamilton
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • B. M. Hegelich
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • D. Henzlova
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • R. P. Johnson
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • G. Schaumann
    Institut für Kernphysik 6 , Technische Universität Darmstadt, 64289 Darmstadt, Germany
  • K. Schoenberg
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • M. Schollmeier
    Sandia National Laboratories 7 , Albuquerque, New Mexico 87185, USA
  • T. Shimada
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • M. T. Swinhoe
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • T. Taddeucci
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • S. A. Wender
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • G. A. Wurden
    Los Alamos National Laboratory 2 , PO Box 1663, Los Alamos, New Mexico 87545, USA
  • M. Roth
    Institut für Kernphysik 6 , Technische Universität Darmstadt, 64289 Darmstadt, Germany

抄録

<jats:p>Emerging approaches to short-pulse laser-driven neutron production offer a possible gateway to compact, low cost, and intense broad spectrum sources for a wide variety of applications. They are based on energetic ions, driven by an intense short-pulse laser, interacting with a converter material to produce neutrons via breakup and nuclear reactions. Recent experiments performed with the high-contrast laser at the Trident laser facility of Los Alamos National Laboratory have demonstrated a laser-driven ion acceleration mechanism operating in the regime of relativistic transparency, featuring a volumetric laser-plasma interaction. This mechanism is distinct from previously studied ones that accelerate ions at the laser-target surface. The Trident experiments produced an intense beam of deuterons with an energy distribution extending above 100 MeV. This deuteron beam, when directed at a beryllium converter, produces a forward-directed neutron beam with ∼5 × 109 n/sr, in a single laser shot, primarily due to deuteron breakup. The neutron beam has a pulse duration on the order of a few nanoseconds with an energy distribution extending from a few hundreds of keV to almost 80 MeV. For the experiments on neutron-source spot-size measurements, our gated neutron imager was setup to select neutrons in the energy range of 2.5–35 MeV. The spot size of neutron emission at the converter was measured by two different imaging techniques, using a knife-edge and a penumbral aperture, in two different experimental campaigns. The neutron-source spot size is measured ∼1 mm for both experiments. The measurements and analysis reported here give a spatial characterization for this type of neutron source for the first time. In addition, the forward modeling performed provides an empirical estimate of the spatial characteristics of the deuteron ion-beam. These experimental observations, taken together, provide essential yet unique data to benchmark and verify theoretical work into the basic acceleration mechanism, which remains an ongoing challenge.</jats:p>

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