Actions for Dual-Particle Imaging System with Neutron Spectroscopy for Safeguard Applications [electronic resource].

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Dual-Particle Imaging System with Neutron Spectroscopy for Safeguard Applications [electronic resource].

Published
Washington, D.C. : United States. National Nuclear Security Administration, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
16 pages : digital, PDF file
Additional Creators
Sandia National Laboratories, United States. National Nuclear Security Administration, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A dual-particle imager (DPI) has been designed that is capable of detecting gamma-ray and neutron signatures from shielded SNM. The system combines liquid organic and NaI(Tl) scintillators to form a combined Compton and neutron scatter camera. Effective image reconstruction of detected particles is a crucial component for maximizing the performance of the system; however, a key deficiency exists in the widely used iterative list-mode maximum-likelihood estimation-maximization (MLEM) image reconstruction technique. For MLEM a stopping condition is required to achieve a good quality solution but these conditions fail to achieve maximum image quality. Stochastic origin ensembles (SOE) imaging is a good candidate to address this problem as it uses Markov chain Monte Carlo to reach a stochastic steady-state solution. The application of SOE to the DPI is presented in this work.
Report Numbers
E 1.99:sand2017-13049r
sand2017-13049r
Subject(s)
Note
Published through SciTech Connect.
11/01/2017.
"sand2017-13049r"
"659229"
Michael C. Hamel; Thomas M. Weber.
Funding Information
NA0003525
View MARC record | catkey: 24048476