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Systems and methods for high-Z threat alarm resolution

  • US 9,310,323 B2
  • Filed: 10/16/2014
  • Issued: 04/12/2016
  • Est. Priority Date: 05/16/2009
  • Status: Active Grant
First Claim
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1. A second stage screening system to resolve a threat alarm detected in a cargo by a first stage screening system, wherein said first stage screening system generates threat sensitivity vectors, said second stage system comprising:

  • a first muon detector set placed above the cargo to generate first muon information comprising a first coordinate and an angle of incidence of incoming muons;

    a second muon detector set placed below the cargo to generate second muon information comprising an actual coordinate and an actual angle of exit of the incoming muons;

    a detector to measure a momentum of said incoming muons; and

    ,a processing unit, wherein said processing unit;

    receives threat sensitivity vectors determined from the first stage;

    operates a positioning system that positions a high-Z threat within the cargo relative to said first and second muon detectors;

    employs said first and second muon information and threat sensitivity vectors to confirm a presence of high-Z materials; and

    uses an approximate Z distribution and density of a content of said cargo to compensate for a presence of cargo content in a vicinity of said high-Z threat.

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