Composite gamma-neutron detection system
First Claim
1. A combination photon and neutron detector comprisinga first layer comprising a scintillator;
- a second layer positioned below the first layer, said second layer comprising boron and configured to captured neutrons;
a third layer positioned below the second layer, said third layer comprising boron and configured to capture neutrons; and
a gas layer, positioned between the second and third layer, wherein, when a neutron is captured, the second and third layers emit charged particles that ionize gas in the gas layer creating free electron and ion pairs.
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Abstract
The present invention provides a gamma-neutron detector based on mixtures of thermal neutron absorbers that produce heavy-particle emission following thermal capture. In one configuration, B-10 based detector is used in a parallel electrode plate geometry that integrates neutron moderating sheets, such as polyethylene, on the back of the electrode plates to thermalize the neutrons and then detect them with high efficiency. The moderator can also be replaced with plastic scintillator sheets viewed with a large area photomultiplier tube to detect gamma-rays as well. The detector can be used in several scanning configurations including portal, drive-through, drive-by, handheld and backpack, etc.
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Citations
14 Claims
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1. A combination photon and neutron detector comprising
a first layer comprising a scintillator; -
a second layer positioned below the first layer, said second layer comprising boron and configured to captured neutrons; a third layer positioned below the second layer, said third layer comprising boron and configured to capture neutrons; and a gas layer, positioned between the second and third layer, wherein, when a neutron is captured, the second and third layers emit charged particles that ionize gas in the gas layer creating free electron and ion pairs. - View Dependent Claims (2, 3, 4)
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5. A detector array comprising
a plurality of detector tiles, wherein each detector tile comprises: -
a first boron layer, said first boron layer comprising boron; a second boron layer positioned below the first boron layer, said second boron layer comprising boron; and a gas layer, positioned between the first boron layer and second boron layer, wherein, when a neutron is captured, at least one of the first boron layer and second boron layer emit charged particles that ionize gas in the gas layer creating free electron and ion pairs. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification