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Title: Modeling radiative-shocks created by laser–cluster interactions

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.5136070 · OSTI ID:1608570
ORCiD logo [1];  [1];  [1];  [1];  [1];  [2];  [3]; ORCiD logo [3];  [3];  [4];  [5];  [6];  [7];  [3]
  1. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL)
  2. First Light Fusion, Yarnton, (United Kingdom)
  3. Imperial College, London (United Kingdom)
  4. IMS Bordeaux University, Talence (France)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. AWE Aldermaston, Reading (United Kingdom)

Radiative-shocks induced by laser–cluster interactions are modeled using radiation-hydrodynamic simulations. A good agreement—in both shock velocity and density profiles—is obtained between experiment and simulations, indicating that non-local thermodynamic equilibrium (NLTE) radiative effects are important in the experimental regime examined, particularly at early times (≤30 ns) due to the elevated temperatures (≥35 eV). The enhanced NLTE radiative emission causes the shock to be reduced in amplitude, increased in width, and reduced in propagation velocity, while the amplitude of the radiative precursor is increased. As the density and temperature conditions are relatively modest, this potentially has important implications for the scalings that are used in laboratory–astrophysics to transform between laboratory and astrophysical scales, which do not hold for non-LTE systems.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
Engineering and Physical Sciences Research Council (EPSRC); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-76SF00515; AC52-07NA27344
OSTI ID:
1608570
Report Number(s):
LLNL-JRNL--820622
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 27; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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