Angular-resolution and material-characterization measurements for a dual-particle imaging system with mixed-oxide fuel

Poitrasson-Rivière, Alexis; Polack, J. Kyle; Hamel, Michael C.; Klemm, Dietrich D.; Ito, Kai; McSpaden, Alexander T.; Flaska, Marek; Clarke, Shaun D.; Pozzi, Sara A.; Tomanin, Alice; Peerani, Paolo

doi:10.1016/j.nima.2015.06.045

Title: Angular-resolution and material-characterization measurements for a dual-particle imaging system with mixed-oxide fuel

Journal Article · Fri Jul 03 00:00:00 EDT 2015 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2015.06.045· OSTI ID:1581995

Poitrasson-Rivière, Alexis ^[1]; Polack, J. Kyle ^[1]; Hamel, Michael C. ^[1]; Klemm, Dietrich D. ^[1]; Ito, Kai ^[1]; McSpaden, Alexander T. ^[1]; Flaska, Marek ^[1]; Clarke, Shaun D. ^[1]; Pozzi, Sara A. ^[1]; Tomanin, Alice ^[2];

^[3]

Univ. of Michigan, Ann Arbor, MI (United States)
Lainsa-Italia S.R.L., Ispra (Italy)
Inst. for Transuranium Elements, Ispra (Italy)

A dual-particle imaging (DPI) system, capable of simultaneously imaging fast neutrons and gamma rays, has been operated in the presence of mixed-oxide (MOX) fuel to assess the system's angular resolution and material-characterization capabilities. The detection principle is based on the scattering physics of neutrons (elastic scattering) and gamma rays (Compton scattering) in organic and inorganic scintillators. The detection system is designed as a combination of a two-plane Compton camera and a neutron-scatter camera. The front plane consists of EJ-309 liquid scintillators and the back plane consists of interleaved EJ-309 and NaI(Tl) scintillators. MCNPX-PoliMi was used to optimize the geometry of the system and the resulting prototype was built and tested using a Cf-252 source as an SNM surrogate. A software package was developed to acquire and process data in real time. The software was used for a measurement campaign to assess the angular resolution of the imaging system with MOX samples. Measurements of two MOX canisters of similar isotopics and intensity were performed for 6 different canister separations (from 5° to 30°, corresponding to distances of 21 cm and 131 cm, respectively). The measurements yielded a minimum separation of 20° at 2.5 m (86-cm separation) required to see 2 separate hot spots. Additionally, the results displayed good agreement with MCNPX-PoliMi simulations. These results indicate an angular resolution between 15° and 20°, given the 5° step. Coupled with its large field of view, and its capability to differentiate between spontaneous fission and (α,n) sources, the DPI system shows its potential for nuclear-nonproliferation applications.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

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

Grant/Contract Number:: NA0002481; AC04-94AL85000; NE0000324; 173669; FOA-0000568; NA0002534

OSTI ID:: 1581995

Alternate ID(s):: OSTI ID: 1247240; OSTI ID: 1365797

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 797, Issue C; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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Cited By (1)

Active neutron and gamma-ray imaging of highly enriched uranium for treaty verification Hamel, Michael C.; Polack, J. Kyle; Ruch, Marc L. Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-08253-x	journal	August 2017

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