Modeling the one-dimensional imager of neutrons (ODIN) for neutron response functions at the Sandia Z facility

Vaughan, J. D.; Ruiz, C. L.; Fittinghoff, D.; May, M. J.; Ampleford, D. J.; Cooper, G. W.; Chandler, G. A.; Hahn, K.; Styron, J. D.; McWatters, B. R.; Torres, J.; Maurer, A. J.; Jones, B.

doi:10.1063/1.5039366

Title: Modeling the one-dimensional imager of neutrons (ODIN) for neutron response functions at the Sandia Z facility

Journal Article · Tue Oct 09 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5039366· OSTI ID:1513161

Vaughan, J. D. ^[1]; Ruiz, C. L. ^[2];

^[3]; May, M. J. ^[3];

^[2]; Cooper, G. W. ^[1]; Chandler, G. A. ^[2]; Hahn, K. ^[2]; Styron, J. D. ^[1]; McWatters, B. R. ^[2]; Torres, J. ^[2]; Maurer, A. J. ^[2]; Jones, B. ^[2]

Univ. of New Mexico, Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The one-dimensional imager of neutrons (ODIN) at the Sandia Z facility consists of a 10-cm block of tungsten with rolled edges, creating a slit imager with slit widths of either 250, 500, or 750 μm. Designed with a 1-m neutron imaging line of sight, we achieve about 4:1 magnification and 500-μm axial spatial resolution. The baseline inertial confinement fusion concept at Sandia is magnetized liner inertial fusion, which nominally creates a 1-cm line source of neutrons. ODIN was designed to determine the size, shape, and location of the neutron producing region, furthering the understanding of compression quality along the cylindrical axis of magnetized liner implosions. Challenges include discriminating neutrons from hard x-rays and gammas with adequate signal-to-noise in the 2 × 10¹² deuterium-deuterium (DD) neutron yield range, as well as understanding the point spread function of the imager to various imaging detectors (namely, CR-39). Modeling efforts were conducted with MCNP6.1 to determine neutron response functions for varying configurations in a clean DD neutron environment (without x-rays or gammas). Configuration alterations that will be shown include rolled-edge slit orientation and slit width, affecting the resolution and response function. The experiment to determine CR-39 neutron sensitivity, with and without a high density polyethylene (n, p) converter, an edge spread function, and resolution will be discussed.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

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

Grant/Contract Number:: AC52-07NA27344; NA0003525

OSTI ID:: 1513161

Alternate ID(s):: OSTI ID: 1476839

Report Number(s):: LLNL-JRNL-770778; 961145

Journal Information:: Review of Scientific Instruments, Vol. 89, Issue 10; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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References (12)

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Cited By (2)

One dimensional imager of neutrons on the Z machine Ampleford, David J.; Ruiz, Carlos L.; Fittinghoff, David N. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038118	journal	October 2018
Average neutron time-of-flight instrument response function inferred from single D-T neutron events within a plastic scintillator Styron, J. D.; Ruiz, C. L.; Hahn, K. D. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038883	journal	October 2018

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