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Title: Radiation portal monitor system and method

Patent ·
OSTI ID:1013866
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  1. Los Alamos, NM
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A portal monitoring system has a cosmic ray charged particle tracker with a plurality of drift cells. The drift cells, which can be for example aluminum drift tubes, can be arranged at least above and below a volume to be scanned to thereby track incoming and outgoing charged particles, such as cosmic ray muons, whilst also detecting gamma rays. The system can selectively detect devices or materials, such as iron, lead, gold and/or tungsten, occupying the volume from multiple scattering of the charged particles passing through the volume and can also detect any radioactive sources occupying the volume from gamma rays emitted therefrom. If necessary, the drift tubes can be sealed to eliminate the need for a gas handling system. The system can be employed to inspect occupied vehicles at border crossings for nuclear threat objects.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-06NA25396
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Number(s):
7,633,062
Application Number:
US Patent Application 11/771,169
OSTI ID:
1013866
Country of Publication:
United States
Language:
English

References (9)

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Large precision muon detector for ATLAS journal November 2002
D0 forward-angle muon tracking detector and its gas system journal June 2002
Large vessel imaging using cosmic-ray muons journal June 2004
Information Extraction for Muon Radiography conference January 2005
Radiographic imaging with cosmic-ray muons journal March 2003
Detection of high- Z objects using multiple scattering of cosmic ray muons journal October 2003
Image reconstruction and material Z discrimination via cosmic ray muon radiography
  • Schultz, L. J.; Borozdin, K. N.; Gomez, J. J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 519, Issue 3 https://doi.org/10.1016/j.nima.2003.11.035
journal March 2004
Penalized maximum-likelihood image reconstruction using space-alternating generalized EM algorithms journal January 1995

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