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Time encoded radiation imaging

Patent ·
OSTI ID:1160243
; ;

The various technologies presented herein relate to detecting nuclear material at a large stand-off distance. An imaging system is presented which can detect nuclear material by utilizing time encoded imaging relating to maximum and minimum radiation particle counts rates. The imaging system is integrated with a data acquisition system that can utilize variations in photon pulse shape to discriminate between neutron and gamma-ray interactions. Modulation in the detected neutron count rates as a function of the angular orientation of the detector due to attenuation of neighboring detectors is utilized to reconstruct the neutron source distribution over 360 degrees around the imaging system. Neutrons (e.g., fast neutrons) and/or gamma-rays are incident upon scintillation material in the imager, the photons generated by the scintillation material are converted to electrical energy from which the respective neutrons/gamma rays can be determined and, accordingly, a direction to, and the location of, a radiation source identified.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
8,866,100
Application Number:
14/010,352
OSTI ID:
1160243
Country of Publication:
United States
Language:
English

References (5)

The RHESSI Imaging Concept journal January 2002
Long range neutron-gamma point source detection and imaging using unique rotating detector conference October 2007
A rotating modulation imager for locating mid-range point sources
  • Kowash, B. R.; Wehe, D. K.; Fessler, J. A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 602, Issue 2, p. 477-483 https://doi.org/10.1016/j.nima.2008.12.233
journal April 2009
Thermal neutron imaging with a Rotationally Modulated Collimator (RMC)
  • Boyce, N. O.; Kowash, B. R.; Wehe, D. K.
  • 2009 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2009), 2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC) https://doi.org/10.1109/NSSMIC.2009.5402407
conference October 2009
Gamma-Ray Imaging with Stochastic Apertures journal January 1974

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY