Active coded aperture neutron imaging

Because of their penetrating power, energetic neutrons and gamma rays (>~1 MeV) offer the best possibility of detecting highly shielded or distant special nuclear material (SNM). Of these, fast neutrons offer the greatest advantage due to their very low and well understood natural background. We...

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Bibliographic Details
Main Authors: Marleau, P., Brennan, J., Brubaker, E., Hilton, N., Steele, J.
Format: Conference Proceeding
Language:English
Subjects:
Apertures
Detectors
Event detection
Field programmable gate arrays
Instruments
Neutrons
Nuclear and plasma sciences
Optical imaging
Pulse shaping methods
X-ray scattering
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Summary:Because of their penetrating power, energetic neutrons and gamma rays (>~1 MeV) offer the best possibility of detecting highly shielded or distant special nuclear material (SNM). Of these, fast neutrons offer the greatest advantage due to their very low and well understood natural background. We are investigating a wholly new approach to fast-neutron imaging-an active coded-aperture system that uses a coded mask composed of neutron detectors. The only previously demonstrated method for long-range fast neutron imaging is double-scatter imaging. Active coded-aperture neutron imaging should offer a highly efficient alternative for improved detection speed, range, and sensitivity. We will describe our detector including design considerations and present initial results from a lab prototype.
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2009.5402146