EPJ Web of Conferences (Nov 2013)

Towards an integrated model of the NIC layered implosions

  • Jones O.,
  • Callahan D.,
  • Cerjan C.,
  • Clark D.,
  • Edwards M.J.,
  • Glenzer S.,
  • Marinak M.,
  • Meezan N.,
  • Milovich J.,
  • Olson R.,
  • Patel M.,
  • Robey H.,
  • Sepke S.,
  • Spears B.,
  • Springer P.,
  • Weber S.,
  • Wilson D.

DOI
https://doi.org/10.1051/epjconf/20135902009
Journal volume & issue
Vol. 59
p. 02009

Abstract

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A detailed simulation-based model of the June 2011 National Ignition Campaign (NIC) cryogenic DT experiments is presented. The model is based on integrated hohlraum-capsule simulations that utilize the best available models for the hohlraum wall, ablator, and DT equations of state and opacities. The calculated radiation drive was adjusted by changing the input laser power to match the experimentally measured shock speeds, shock merger times, peak implosion velocity, and bangtime. The crossbeam energy transfer model was tuned to match the measured time-dependent symmetry. Mid-mode mix was included by directly modeling the ablator and ice surface perturbations up to mode 60. Simulated experimental values were extracted from the simulation and compared against the experiment. The model adjustments brought much of the simulated data into closer agreement with the experiment, with the notable exception of the measured yields, which were 15–40% of the calculated yields.