A new proof-of-principle contraband detection system

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A new concept for a CDS has been developed under a Phase I ARPA funded program; it uses gamma resonance absorption (GRA) to detect certain illegal drugs that may be transported in man-portable containers. A high detection probability for heroin and cocaine is possible with a device that is also searching for explosives. Elemental detection of both N and Cl is utilized, and with tomography, a 3D density image of the elements is generated. Total density image is also developed. These two together may be used with considerable confidence in determining if heroin or cocaine is present in the interrogated ... continued below

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11 p.

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Sredniawski, J.J.; Debiak, T.; Kamykowski, E.; Rathke, J.; Schmor, P.; Altman, A. et al. December 1, 1995.

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Description

A new concept for a CDS has been developed under a Phase I ARPA funded program; it uses gamma resonance absorption (GRA) to detect certain illegal drugs that may be transported in man-portable containers. A high detection probability for heroin and cocaine is possible with a device that is also searching for explosives. Elemental detection of both N and Cl is utilized, and with tomography, a 3D density image of the elements is generated. Total density image is also developed. These two together may be used with considerable confidence in determining if heroin or cocaine is present in the interrogated containers in a small quantity (1 kg). The CDS employs a high current ({ge}10 mA) DC accelerator that produces a beam of 1.75 or 1.89 MeV protons. These protons impact a target with coatings of {sup 13}C and {sup 34}S. Depending on the coating, the resultant resonant gamma rays are preferentially absorbed in either {sup 14}N or {sup 35}Cl. The resonant gammas come off the target in a conical fan at 80.7{degree} for N and 82{degree} for Cl; a common array of segmented BGO detectors is used over an arc of 53{degree} to provide input to an imaging subsystem. The tomography makes use of rotation and vertical translation of a baggage carousel holding typically 18 average sized bags for batch processing of the contents. The single proton accelerator and target can supply multiple detection stations with the appropriate gammas, a feature that may lead to very high throughput potential approaching 2000 bags/hr. Each detection station can operate somewhat independently from the others. This paper presents the overall requirements, design, operating principles, and characteristics of the CDS proof-of-principle device developed in the Phase I program.

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11 p.

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OSTI as DE96013381

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  • ONDCP international technology symposium, Nashua, NH (United States), 23-27 Oct 1995

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  • Other: DE96013381
  • Report No.: TRI-PP--95-93
  • Report No.: CONF-9510221--5
  • Office of Scientific & Technical Information Report Number: 285220
  • Archival Resource Key: ark:/67531/metadc664063

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  • December 1, 1995

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  • June 29, 2015, 9:42 p.m.

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Sredniawski, J.J.; Debiak, T.; Kamykowski, E.; Rathke, J.; Schmor, P.; Altman, A. et al. A new proof-of-principle contraband detection system, article, December 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc664063/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.