The DT to DD yield ratio as a diagnostic of implosion dynamics for NIF ICF experiments.

ORAL

Abstract

The variation of the yield ratio YDT/YDD for implosions of cryogenically layered deuterium and tritium (DT) fueled capsules exceeds the expectation based on measurement statistical uncertainties and fuel isotopic concentration [M. Gatu-Johnson, et al., Phys. Plasmas, 20 (2013) 042707]. Variations in the line-of-sight diagnostics depend on both the attenuation of the "birth spectrum" of the neutrons through the compressed, cold fuel and the burn-averaged moments of the fuel velocity distributions [D. H. Munro, Nucl. Fusion, 56 (2016) 036001]. An analysis of the variability of the yield ratio for recent implosions sets limits on the size of the velocity contributions. These limits are compared to expectations from 2D and 3D simulation ensembles of similar implosions.

*Work supported under the auspices of DOE Contract DE-AC52-07NA27344. LLNL-ABS-753691

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Presenters

  • Edward P Hartouni

    • Lawrence Livermore Natl Lab

Authors

  • Edward P Hartouni

    • Lawrence Livermore Natl Lab

  • Richard Marshall Bionta

    • Lawrence Livermore Natl Lab

  • Mark J. Eckart

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • John E Field

    • Lawrence Livermore Natl Lab

  • Maria Gatu Johnson

    • Massachusetts Inst of Tech-MIT
    • Massachusetts Institute of Technology-MIT
    • PSFC, MIT

  • Gary P Grim

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Robert Hatarik

    • Lawrence Livermore Natl Lab

  • Shaun Kerr

    • Lawrence Livermore Natl Lab

  • Joe D. Kilkenny

    • General Atomics
    • Lawrence Livermore Natl Lab

  • D. H. Munro

    • Lawrence Livermore Natl Lab

  • Alastair S Moore

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • David J. Schlossberg

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory