26 September 2013 Time-encoded imaging of energetic radiation
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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.
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James Brennan, James Brennan, Erik Brubaker, Erik Brubaker, Mark Gerling, Mark Gerling, Peter Marleau, Peter Marleau, Aaron Nowack, Aaron Nowack, Patricia Schuster, Patricia Schuster, "Time-encoded imaging of energetic radiation", Proc. SPIE 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 885203 (26 September 2013); doi: 10.1117/12.2027674; https://doi.org/10.1117/12.2027674


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