SNM neutron detection using a time-gated synthetic aperture hybrid approach

SNM neutron detection using a time-gated synthetic aperture hybrid approach

This work focuses on using forward and adjoint transport in a hybrid application of 3-D deterministic (PENTRAN) and Monte Carlo (MCNP5) codes to model a series of neutron detector blocks. These blocks, or “channels,” contain a unique set of moderators with 4 atm He-3 proportional detectors tuned to...

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Bibliographic Details
Main Author: Molinar, Matthew P.
Other Authors: Sjoden, Glenn E.
Format: Others
Language:en_US
Published: Georgia Institute of Technology 2014
Subjects:
PENTRAN
Deterministic
3-D
3D neutron
Transport
Detection
Time-gated
Aperture
Neutron counters
Computer simulation
Online Access:http://hdl.handle.net/1853/50212
Description
Summary:This work focuses on using forward and adjoint transport in a hybrid application of 3-D deterministic (PENTRAN) and Monte Carlo (MCNP5) codes to model a series of neutron detector blocks. These blocks, or “channels,” contain a unique set of moderators with 4 atm He-3 proportional detectors tuned to detect and profile a gross energy spectrum of a passing neutron (SNM) source. Ganging the units together as a large area system enables one to apply time gating the source-detector response to maximize signal to noise responses from a passing source with minimal background; multiple units may be positioned as a collective synthetic aperture detector array to be used as a way of performing real time neutron spectroscopy for detecting special nuclear materials in moving vehicles.

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