NDLI: A Compton Telescope for Remote Location and Identification of Radioactive Material

Content Provider	IEEE Xplore Digital Library
Author	Legere, J.S. Baker, J. Bravar, U. Macri, J.R. Ryan, J.M.
Copyright Year	2008
Description	Author affiliation: Space Sci. Center, Univ. of New Hampshire, Durham, NH (Legere, J.S.; Baker, J.; Bravar, U.; Macri, J.R.; Ryan, J.M.)
Abstract	The spare detectors from NASA's Compton Gamma-Ray Observatory COMPTEL instrument have been reconfigured to demonstrate the capability at ground level to remotely locate and identify sources of gamma radiation. The Gamma-Ray Experimental Telescope Assembly (GRETA) employs two 28 cm diameter scintillation detectors separated by 81 cm: one 8.5 cm thick liquid scintillator detector and one 7.5 cm thick Nal(Tl) detector. The assembly electronics and real-time data acquisition system measures the energy deposits and time-of-flight for each coincident detection and compiles histograms of total energy and incident angle as computed using the kinematics of Compton scattering. GRETA's field of view is a cone with full angle approximately 120deg. The sensitive energy range is 0.3 to 2.6 MeV. Energy resolution is ~10% FWHM. The angular resolution, ~15deg in the simplified configuration tested, will improve to better than 5deg with well-defined enhancements to the data acquisition hardware and data analysis routines. We conducted a series of laboratory demonstrations to characterize the performance of the GRETA detector. Following detector characterization, we demonstrate GRETA 's ability to locate and identify an unknown source and position within its field of view. In this scenario, the location and isotope-identifying energy spectrum of an 800 $muCi^{137}$ Cs source 10 meters from the instrument with two intervening walls was determined in less than one minute. We will present further details of the instrument design and the measurements.
Starting Page	181
Ending Page	186
File Size	2323516
Page Count	6
File Format	PDF
ISBN	9781424419777
DOI	10.1109/THS.2008.4534446
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radioactive materials Observatories Gamma ray detectors Instruments Radiation detectors Data acquisition Energy resolution Solid scintillation detectors Telescopes Gamma ray detection
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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