T-REX Design Considerations for Detection of Concealed 238U

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Here they outline considerations that might inform choices for the design of a laser/linac-based light source used to detect {sup 238}U via excitation of the resonance at 680.11 keV in this isotope. They assume that the principal concern is speed of interrogation and not, e.g., how much radiological dose is imparted during a scan. It is found that if the photon detectors used in the system have an energy resolution better than or comparable to that of the interrogation beam, then to a first approximation the light source should be designed to have the highest possible specific fluence (photons per ... continued below

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PDF-file: 9 pages; size: 0.3 Mbytes

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Pruet, J & McNabb, D P February 7, 2006.

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Description

Here they outline considerations that might inform choices for the design of a laser/linac-based light source used to detect {sup 238}U via excitation of the resonance at 680.11 keV in this isotope. They assume that the principal concern is speed of interrogation and not, e.g., how much radiological dose is imparted during a scan. It is found that if the photon detectors used in the system have an energy resolution better than or comparable to that of the interrogation beam, then to a first approximation the light source should be designed to have the highest possible specific fluence (photons per unit energy per unit time). there is also a weak dependence of scan time on the number of photons emitted per pulse of the light source. A simple formula describing the tradeoff between specific fluence and number of photons per pulse is presented.

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PDF-file: 9 pages; size: 0.3 Mbytes

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  • Report No.: UCRL-TR-219071
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/893990 | External Link
  • Office of Scientific & Technical Information Report Number: 893990
  • Archival Resource Key: ark:/67531/metadc881677

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  • February 7, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 9, 2016, 8:23 p.m.

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Pruet, J & McNabb, D P. T-REX Design Considerations for Detection of Concealed 238U, report, February 7, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc881677/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.