Design of the opacity spectrometer for opacity measurements at the National Ignition Facility

Ross, P. W.; Heeter, R. F.; Ahmed, M. F.; Dodd, E.; Huffman, E. J.; Liedahl, D. A.; King, J. A.; Opachich, Y. P.; Schneider, M. B.; Perry, T. S.

doi:10.1063/1.4962819

Title: Design of the opacity spectrometer for opacity measurements at the National Ignition Facility

Journal Article · 03 October 2016 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/1.4962819 · OSTI ID:1438694

Ross, P. W. ^[1];

^[2]; Ahmed, M. F. ^[2]; Dodd, E. ^[3]; Huffman, E. J. ^[1]; Liedahl, D. A. ^[2]; King, J. A. ^[1];

^[1];

^[2];

^[3]

National Security Technologies, LLC. (NSTec), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Recent experiments at the Sandia National Laboratory Z facility have called into question models used in calculating opacity, of importance for modeling stellar interiors. An effort is being made to reproduce these results at the National Ignition Facility (NIF). These experiments require a new X-ray opacity spectrometer (OpSpec) spanning 540 eV–2100 eV with a resolving power E/ΔE > 700. The design of the OpSpec is presented. Photometric calculations based on expected opacity data are also presented in this paper. First use on NIF is expected in September 2016.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); National Security Technologies, LLC. (NSTec), Livermore, CA (United States)

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

Grant/Contract Number:: AC52-07NA27344; AC52-06NA25946

OSTI ID:: 1438694

Report Number(s):: LLNL-JRNL--740588

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Cited By (5)

Hohlraum modeling for opacity experiments on the National Ignition Facility Dodd, E. S.; DeVolder, B. G.; Martin, M. E. Physics of Plasmas, Vol. 25, Issue 6 https://doi.org/10.1063/1.5026285	journal	June 2018
Implementation of a 1-2 keV point-projection x-ray spectrometer on the National Ignition Facility King, J. A.; Opachich, Y. P.; Huffman, E. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038092	journal	October 2018
Computation of Atomic Astrophysical Opacities Mendoza, Claudio Atoms, Vol. 6, Issue 2 https://doi.org/10.3390/atoms6020028	journal	May 2018
Iron X-ray Transmission at Temperature Near 150 eV Using the National Ignition Facility: First Measurements and Paths to Uncertainty Reduction Heeter, Robert; Perry, Ted; Johns, Heather Atoms, Vol. 6, Issue 4 https://doi.org/10.3390/atoms6040057	journal	October 2018
Computation of atomic astrophysical opacities Mendoza, Claudio arXiv https://doi.org/10.48550/arxiv.1704.03528	text	January 2017

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47 OTHER INSTRUMENTATION
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hohlraum
iron
opacity
photons
solar radiation
transition radiation

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