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Proceedings Paper

Time-encoded imaging of energetic radiation
Author(s): James Brennan; Erik Brubaker; Mark Gerling; Peter Marleau; Aaron Nowack; Patricia Schuster
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Paper Abstract

Time-encoded imaging (TEI) is a new approach to directional detection of energetic radiation that produces images by inducing a time-dependent modulation of detected particles. TEI-based detectors use single-scatter events and have a low channel count, reducing complexity and cost while maintaining high efficiency with respect to other radiation imaging techniques such as double-scatter or coded aperture imaging. The scalability of TEI systems makes them a very promising detector class for weak source detection. Extension of the technique to high-resolution imaging is also under study. With a prototype time-encoding detector, we demonstrated detection of a neutron source at 60 m with neutron output equivalent to an IAEA significant quantity of WGPu. We have since designed and built a full-scale detector based on the time-encoding concept. We will present results from characterization of very large liquid scintillator cells, including pulse shape discrimination, as well as from studies of the detector system performance in weak source detection scenarios.

Paper Details

Date Published: 26 September 2013
PDF: 8 pages
Proc. SPIE 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 885203 (26 September 2013); doi: 10.1117/12.2027674
Show Author Affiliations
James Brennan, Sandia National Labs. (United States)
Erik Brubaker, Sandia National Labs. (United States)
Mark Gerling, Sandia National Labs. (United States)
Peter Marleau, Sandia National Labs. (United States)
Aaron Nowack, Sandia National Labs. (United States)
Patricia Schuster, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 8852:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV
Michael Fiederle; Arnold Burger; Larry Franks; Ralph B. James, Editor(s)

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