A fieldable-prototype, large-area, gamma-ray imager for orphan source search

Klaus P. Ziock; Lorenzo Fabris; Dennis Carr; Jeff Collins; Mark Cunningham; Frezghi Habte; Tom Karnowski; William Marchant

doi:10.1109/TNS.2008.2006753

A fieldable-prototype, large-area, gamma-ray imager for orphan source search

Klaus P. Ziock, Lorenzo Fabris, Dennis Carr, Jeff Collins, Mark Cunningham, Frezghi Habte, Tom Karnowski, William Marchant

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

We have constructed a unique instrument for use in the search for orphan sources. The system uses gamma-ray imaging to see through the natural background variations that effectively limit the sensitivity of current devices. The imager is mounted in a 4.9-m-long trailer and can be towed by a large personal vehicle. Source locations are determined both in range and along the direction of travel as the vehicle moves. A fully inertial platform coupled to a global positioning system receiver is used to map the gamma-ray images onto overhead geospatial imagery. The resulting images provide precise source locations, allowing rapid follow-up work. The instrument simultaneously searches both sides of the street to a distance of 50 m (100-m swath) for millicurie-class sources with excellent performance as determined using source injection studies and Receiver-Operator-Characteristic techniques.

Original language	English
Article number	4723827
Pages (from-to)	3643-3653
Number of pages	11
Journal	IEEE Transactions on Nuclear Science
Volume	55
Issue number	6
DOIs	https://doi.org/10.1109/TNS.2008.2006753
State	Published - Dec 2008

Funding

Manuscript received April 04, 2008; revised August 09, 2008. Current version published December 31, 2008. This work was supported by the Department of Homeland Security and Domestic Nuclear Detection Office. Portions of the work were conducted by the Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. Portions of this work were conducted under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory, under Contract W-7405-Eng-48.

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
University of California
Lawrence Livermore National Laboratory	W-7405-Eng-48
Domestic Nuclear Detection Office

Keywords

Coded-aperture imager
Gamma-ray detectors
Gamma-ray imagers
Nuclear imaging
Orphan source search

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10.1109/TNS.2008.2006753

Cite this

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abstract = "We have constructed a unique instrument for use in the search for orphan sources. The system uses gamma-ray imaging to see through the natural background variations that effectively limit the sensitivity of current devices. The imager is mounted in a 4.9-m-long trailer and can be towed by a large personal vehicle. Source locations are determined both in range and along the direction of travel as the vehicle moves. A fully inertial platform coupled to a global positioning system receiver is used to map the gamma-ray images onto overhead geospatial imagery. The resulting images provide precise source locations, allowing rapid follow-up work. The instrument simultaneously searches both sides of the street to a distance of 50 m (100-m swath) for millicurie-class sources with excellent performance as determined using source injection studies and Receiver-Operator-Characteristic techniques.",

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AU - Habte, Frezghi

AU - Karnowski, Tom

AU - Marchant, William

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A fieldable-prototype, large-area, gamma-ray imager for orphan source search

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Keywords

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