Conceptual design and optimization of a plastic scintillator array for 2D tomography using a compact D-D fast neutron generator

Robert Adams, Robert Zboray, Marco Cortesi, Horst Michael Prasser

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    A conceptual design optimization of a fast neutron tomography system was performed. The system is based on a compact deuterium-deuterium fast neutron generator and an arc-shaped array of individual neutron detectors. The array functions as a position sensitive one-dimensional detector allowing tomographic reconstruction of a two-dimensional cross section of an object up to 10. cm across. Each individual detector is to be optically isolated and consists of a plastic scintillator and a Silicon Photomultiplier for measuring light produced by recoil protons. A deterministic geometry-based model and a series of Monte Carlo simulations were used to optimize the design geometry parameters affecting the reconstructed image resolution. From this, it is expected that with an array of 100 detectors a reconstructed image resolution of ~1.5. mm can be obtained. Other simulations were performed in order to optimize the scintillator depth (length along the neutron path) such that the best ratio of direct to scattered neutron counts is achieved. This resulted in a depth of 6-8. cm and an expected detection efficiency of 33-37%. Based on current operational capabilities of a prototype neutron generator being developed at the Paul Scherrer Institute, planned implementation of this detector array design should allow reconstructed tomograms to be obtained with exposure times on the order of a few hours.

    Original languageEnglish (US)
    Pages (from-to)63-70
    Number of pages8
    JournalApplied Radiation and Isotopes
    Volume86
    DOIs
    StatePublished - Apr 1 2014

    Fingerprint

    fast neutrons
    scintillation counters
    generators
    plastics
    tomography
    optimization
    detectors
    image resolution
    neutrons
    deuterium
    recoil protons
    neutron counters
    design optimization
    geometry
    simulation
    arcs
    prototypes
    cross sections
    silicon

    All Science Journal Classification (ASJC) codes

    • Radiation

    Cite this

    Adams, Robert ; Zboray, Robert ; Cortesi, Marco ; Prasser, Horst Michael. / Conceptual design and optimization of a plastic scintillator array for 2D tomography using a compact D-D fast neutron generator. In: Applied Radiation and Isotopes. 2014 ; Vol. 86. pp. 63-70.
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    abstract = "A conceptual design optimization of a fast neutron tomography system was performed. The system is based on a compact deuterium-deuterium fast neutron generator and an arc-shaped array of individual neutron detectors. The array functions as a position sensitive one-dimensional detector allowing tomographic reconstruction of a two-dimensional cross section of an object up to 10. cm across. Each individual detector is to be optically isolated and consists of a plastic scintillator and a Silicon Photomultiplier for measuring light produced by recoil protons. A deterministic geometry-based model and a series of Monte Carlo simulations were used to optimize the design geometry parameters affecting the reconstructed image resolution. From this, it is expected that with an array of 100 detectors a reconstructed image resolution of ~1.5. mm can be obtained. Other simulations were performed in order to optimize the scintillator depth (length along the neutron path) such that the best ratio of direct to scattered neutron counts is achieved. This resulted in a depth of 6-8. cm and an expected detection efficiency of 33-37{\%}. Based on current operational capabilities of a prototype neutron generator being developed at the Paul Scherrer Institute, planned implementation of this detector array design should allow reconstructed tomograms to be obtained with exposure times on the order of a few hours.",
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    Conceptual design and optimization of a plastic scintillator array for 2D tomography using a compact D-D fast neutron generator. / Adams, Robert; Zboray, Robert; Cortesi, Marco; Prasser, Horst Michael.

    In: Applied Radiation and Isotopes, Vol. 86, 01.04.2014, p. 63-70.

    Research output: Contribution to journalArticle

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