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2 August 2021 Neutron transmission imaging with a portable D-T neutron generator
Phillip Kerr, Nerine Cherepy, Jennifer Church, Gary Guethlein, James Hall, Colby McNamee, Sean O’Neal, Kyle Champley, Andrew Townsend, Mayuki Ssasagawa, Anthony Hardy
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Proceedings Volume 11838, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII; 118380M (2021) https://doi.org/10.1117/12.2596473
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States
Abstract
Fast neutrons accessible from 14-MeV D-T neutron generators have higher transmission through high-Z materials compared to radiography X-rays due to a more uniform attenuation as a function of material Z. These neutrons can therefore image low-Z materials even when shielded by high-Z materials. The constraints in portable fast-neutron digital imaging systems include limited neutron output, limited light produced by neutron imaging scintillators, and lower resolution images due to large source spot size and required scintillator thickness. In addition, digital panel dark-noise counts can be 100x higher than the image signal, and variations across the panel can also be comparable to this signal. We will discuss recent efforts to develop a portable neutron-radiography system, including improved neutron scintillator, mitigation of digital panel noise, and new portable D-T neutron generators. We will also present MCNP efforts to model the system, including neutron scattering effects.
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Phillip Kerr, Nerine Cherepy, Jennifer Church, Gary Guethlein, James Hall, Colby McNamee, Sean O’Neal, Kyle Champley, Andrew Townsend, Mayuki Ssasagawa, and Anthony Hardy "Neutron transmission imaging with a portable D-T neutron generator", Proc. SPIE 11838, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII, 118380M (2 August 2021); https://doi.org/10.1117/12.2596473
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KEYWORDS
Imaging systems
Scintillators
Digital imaging
Inspection
Radiography
X-ray imaging
X-rays
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