An improved methodology for modeling short pulse buried layer x-ray emission spectra

Cliche, D. T.; Martin, M. E.; London, R. A.; Scott, H. A.; Patel, M. V.

doi:10.1016/j.cpc.2024.109168

Title: An improved methodology for modeling short pulse buried layer x-ray emission spectra

Journal Article · 15 March 2024 · Computer Physics Communications

DOI: https://doi.org/10.1016/j.cpc.2024.109168 · OSTI ID:2335995

^[1]; Martin, M. E. ^[1]; London, R. A. ^[1]; Scott, H. A. ^[1]; Patel, M. V. ^[1]

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

Radiation-hydrodynamic and spectroscopic modeling are important aspects of high energy density experimental design. In this paper, we improve the performance and capabilities over those obtainable with a previous methodology used for simulating x-ray emission spectra from buried layer targets heated by short pulse lasers. The improvement incorporates post-processing HYDRA radiation-hydrodynamic output with a non-local thermodynamic equilibrium atomic-kinetics radiation transport code, Cretin. Each code uses an independent radiation field which allows decoupling HYDRA's radiation group structure from Cretin's spectral output to improve the speed and flexibility of the design methodology. The execution time decreases from 2–3 days to a few hours while the flexibility of the improved methodology allows for performing sensitivity studies including a comparison of steady-state and time-dependent atomic kinetics and differences in the radiation group structure.

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

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

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 2335995

Report Number(s):: LLNL--JRNL-852805; 1080256

Journal Information:: Computer Physics Communications, Journal Name: Computer Physics Communications Journal Issue: N/A Vol. 300; ISSN 0010-4655

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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