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Proceedings Paper

Spectroscopic radiation imager for Internet-based safeguards and monitoring
Author(s): Mitchell Woodring; David Souza; Larry Honig; Michael R. Squillante; Gerald Entine
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Paper Abstract

Monitoring nuclear materials that is dangerously radioactive, remotely located, or difficult to access is a challenging task. The necessary research required to develop a system capable of remotely monitoring radioactive materials has been undertaken at Radiation Monitoring Devices, Inc. We report on a system utilizing a spectroscopic gamma-ray imager for real-time observation of sensitive nuclear materials over the Internet or dedicated networks. Research at RMD has produced a spectroscopic gamma-ray imager centered on a position-sensitive photomultiplier tube coupled to scintillation crystal and a coded aperture. A gamma-ray intensity pattern from the detector is stored and processed by a portable computer workstation and then mathematically corrected to yield the original radiation-source image. The pseudo-color, radiation-source image is overlaid on a co-registered video picture of the same area captured by a high-resolution charge-coupled device. The combined image is displayed as an accurate map of gamma-ray sources in the physical environment. Recent developments involve instrument control and data transmission through computer networks. Alarm triggers based on changes in the video image, the radiation image, the energy spectrum are under development. Work to remotely control alarm sensitivity and type, as well as the image update frequency, has also been examined.

Paper Details

Date Published: 1 October 1999
PDF: 9 pages
Proc. SPIE 3769, Penetrating Radiation Systems and Applications, (1 October 1999); doi: 10.1117/12.363689
Show Author Affiliations
Mitchell Woodring, Radiation Monitoring Devices, Inc. (United States)
David Souza, Radiation Monitoring Devices, Inc. (United States)
Larry Honig, Basic Telepresence Inc. (United States)
Michael R. Squillante, Radiation Monitoring Devices, Inc. (United States)
Gerald Entine, Radiation Monitoring Devices, Inc. (United States)

Published in SPIE Proceedings Vol. 3769:
Penetrating Radiation Systems and Applications
F. Patrick Doty, Editor(s)

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