Using tabulated NLTE data for Hohlraum simulations

Scott, H. A.; Harte, J. A.; Foord, M. E.; Woods, D. T.

doi:10.1063/5.0102624

Using tabulated NLTE data for Hohlraum simulations

Journal Article · Fri Aug 19 00:00:00 EDT 2022 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0102624· OSTI ID:1883446

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Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Non-local thermodyamic equilibrium (NLTE) atomic kinetics is necessary in inertial confinement fusion Hohlraum simulations for adequately modeling high-Z walls and dopants but is computationally very expensive. We present here an approach for tabulating NLTE material data in an economical manner. Material properties for an arbitrary radiation field are provided through tabulated data for a limited set of radiation fields plus derivatives with respect to components of those radiation fields. We have implemented this method in a radiation-hydrodynamics code and compare Hohlraum simulations done with inline NLTE calculations with those done with tables constructed from the same atomic data. The results demonstrate that NLTE tables can replace inline calculations in Hohlraum simulations without a significant loss of accuracy.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1883446

Alternate ID(s):: OSTI ID: 1892342

Report Number(s):: LLNL-JRNL-836045; 1053150

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 29; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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