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Fast neutron radiography-based on single-photon digital photosensor: concept and demonstration

Publication Type
Conference Paper
Book Title
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV
Publication Date
Page Numbers
1 to 7
Publisher Location
Bellingham, Washington, United States of America
Conference Name
SPIE Optical Engineering + Applications
Conference Location
San Diego, California, United States of America
Conference Sponsor
Conference Date

For decades, fast neutron radiography performed using pulse-counting detectors employed PMTs coupled to plastic scintillator pixel arrays. SiPM-based systems are now sought to replace fragile PMTs, but conventional, “analog” SiPMs suffer from intrinsic limitations which limit their achievable performance. Among these limitations, a complete analog readout and digitizer chain is required, a counterintuitive approach when considering that the single-photon avalanche diode (SPAD), the basic unit cell of SiPMs, is a Boolean detector providing digital detection at the sensor level. This paper outlines a new concept for neutron radiography instrumentation by using photon-to-digital converters (PDCs, aka digital SiPMs), a fully digital solution to sense the scintillation light.