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Title: Radiation portal monitor system and method

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1013866
Patent Number(s):
7633062
Application Number:
US Patent Application 11/771,169
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Morris, Christopher, Borozdin, Konstantin N, Green, J Andrew, Hogan, Gary E, Makela, Mark F, Priedhorsky, William C, Saunders, Alexander, Schultz, Larry J, and Sossong, Michael J. Radiation portal monitor system and method. United States: N. p., 2009. Web.
Morris, Christopher, Borozdin, Konstantin N, Green, J Andrew, Hogan, Gary E, Makela, Mark F, Priedhorsky, William C, Saunders, Alexander, Schultz, Larry J, & Sossong, Michael J. Radiation portal monitor system and method. United States.
Morris, Christopher, Borozdin, Konstantin N, Green, J Andrew, Hogan, Gary E, Makela, Mark F, Priedhorsky, William C, Saunders, Alexander, Schultz, Larry J, and Sossong, Michael J. Tue . "Radiation portal monitor system and method". United States. https://www.osti.gov/servlets/purl/1013866.
@article{osti_1013866,
title = {Radiation portal monitor system and method},
author = {Morris, Christopher and Borozdin, Konstantin N and Green, J Andrew and Hogan, Gary E and Makela, Mark F and Priedhorsky, William C and Saunders, Alexander and Schultz, Larry J and Sossong, Michael J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {12}
}

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Penalized maximum-likelihood image reconstruction using space-alternating generalized EM algorithms
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