High Z material detection system and method
First Claim
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1. A system for a high Z material detection, comprising:
- at least a first muon detector and a second muon detector positioned essentially parallel to each other, the first muon detector is indicative of an incidence angle, and the second muon detector is indicative of an actual leaving angle for each muon passing the system;
a digital signal processing unit forstoring a data on the incidence and the actual leaving angle for muons passing the system during an exposure time T;
calculating an actual statistics of the actual leaving angles and an expected statistics of expected leaving angles, wherein the expected statistics of the expected leaving angle is estimated assuming absence of the high Z material in between the first and the second muon detector;
finding a difference between the actual and the expected statistics; and
determining a presence of the high Z material inside the system when the difference is above a predetermined difference value.
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Abstract
A method and system for high Z substance revealing using muon detection technique is presented. Natural muon coordinate and incidence angle are measured above and below the interrogated volume. The data on muons trajectory change caused by the presence of high Z material and the muons time of flight between the upper and lower muon detectors are used for the decision making on the presence of a nuclear substance inside the volume. The system is adapted for performing measurements on moving objects such as moving trucks.
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20 Claims
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1. A system for a high Z material detection, comprising:
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at least a first muon detector and a second muon detector positioned essentially parallel to each other, the first muon detector is indicative of an incidence angle, and the second muon detector is indicative of an actual leaving angle for each muon passing the system; a digital signal processing unit for storing a data on the incidence and the actual leaving angle for muons passing the system during an exposure time T; calculating an actual statistics of the actual leaving angles and an expected statistics of expected leaving angles, wherein the expected statistics of the expected leaving angle is estimated assuming absence of the high Z material in between the first and the second muon detector; finding a difference between the actual and the expected statistics; and determining a presence of the high Z material inside the system when the difference is above a predetermined difference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for high Z material revealing, comprising:
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continuously measuring an incident angle of each incoming muon by a first detector; estimating an expected statistics of an expected leaving angle at a second detector for each incoming muon; continuously measuring an actual leaving angle for each incoming muon by the second detector; storing a data on the incident, the actual and the expected leaving angles; calculating an actual statistics of the actual leaving angle; finding a difference between the expected and the actual statistics; and determining a presence of high Z material in between the first and the second muon detector when the difference exceeds a predetermined difference value. - View Dependent Claims (20)
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Specification