Paper
4 May 2007 Fast digitization and discrimination of prompt neutron and photon signals using a novel silicon carbide detector
Brandon W. Blackburn, James T. Johnson, Scott M. Watson, David L. Chichester, James L. Jones, Frank H. Ruddy, John G. Seidel, Robert W. Flammang
Author Affiliations +
Abstract
Current requirements of some Homeland Security active interrogation projects for the detection of Special Nuclear Material (SNM) necessitate the development of faster inspection and acquisition capabilities. In order to do so, fast detectors which can operate during and shortly after intense interrogation radiation flashes are being developed. Novel silicon carbide (SiC) semiconductor Schottky diodes have been utilized as robust neutron and photon detectors in both pulsed photon and pulsed neutron fields and are being integrated into active inspection environments to allow exploitation of both prompt and delayed emissions. These detectors have demonstrated the capability of detecting both photon and neutron events during intense photon flashes typical of an active inspection environment. Beyond the inherent insensitivity of SiC to gamma radiation, fast digitization and processing has demonstrated that pulse shape discrimination (PSD) in combination with amplitude discrimination can further suppress unwanted gamma signals and extract fast neutron signatures. Usable neutron signals have been extracted from mixed radiation fields where the background has exceeded the signals of interest by >1000:1.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brandon W. Blackburn, James T. Johnson, Scott M. Watson, David L. Chichester, James L. Jones, Frank H. Ruddy, John G. Seidel, and Robert W. Flammang "Fast digitization and discrimination of prompt neutron and photon signals using a novel silicon carbide detector", Proc. SPIE 6540, Optics and Photonics in Global Homeland Security III, 65401J (4 May 2007); https://doi.org/10.1117/12.722921
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CITATIONS
Cited by 3 scholarly publications.
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KEYWORDS
Sensors

Silicon carbide

Californium

Inspection

Signal detection

Diodes

Signal processing

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