Neutron source reconstruction using a generalized expectation–maximization algorithm on one-dimensional neutron images from the Z facility

Ricketts, Sidney Austin; Mangan, Michael A.; Volegov, Petr; Fittinghoff, David N.; Lewis, William E.; Mannion, Owen M.; Morel, Jim E.; Adams, Marvin L.; Ampleford, David J.

doi:10.1063/5.0176152

Neutron source reconstruction using a generalized expectation–maximization algorithm on one-dimensional neutron images from the Z facility

Journal Article · Sun Mar 03 23:00:00 EST 2024 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0176152· OSTI ID:2320347

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Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Texas A & M University, College Station, TX (United States)
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Texas A & M University, College Station, TX (United States)

Magnetized Liner Inertial Fusion experiments have been performed at the Z facility at Sandia National Laboratories. These experiments use deuterium fuel, which produces 2.45 MeV neutrons on reaching thermonuclear conditions. To study the spatial structure of neutron production, the one-dimensional imager of neutrons diagnostic was fielded to record axial resolved neutron images. In this diagnostic, neutrons passing through a rolled edge aperture form an image on a CR-39-based solid state nuclear track detector. In this report we present a modified generalized expectation–maximization algorithm to reconstruct an axial neutron emission profile of the stagnated fusion plasma. We validate the approach by comparing the reconstructed neutron emission profile to an x-ray emission profile provided by a time-integrated pinhole camera.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

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

Grant/Contract Number:: NA0003525

OSTI ID:: 2320347

Alternate ID(s):: OSTI ID: 2372812

Report Number(s):: SAND--2024-02765J

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 95; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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