Double helix boron-10 powder thermal neutron detector
US9046612B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Sep 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T3/008
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A double-helix Boron-10 powder detector having intrinsic thermal neutron detection efficiency comparable to 36″ long, 2-in diameter, 2-bar Helium-3 detectors, and which can be used to replace such detectors for use in portal monitoring, is described. An embodiment of the detector includes a metallic plate coated with Boron-10 powder for generating alpha and Lithium-7 particles responsive to neutrons impinging thereon supported by insulators affixed to at least two opposing edges; a grounded first wire wound in a helical manner around two opposing insulators; and a second wire having a smaller diameter than that of the first wire, wound in a helical manner around the same insulators and spaced apart from the first wire, the second wire being positively biased. A gas, disposed within a gas-tight container enclosing the plate, insulators and wires, and capable of stopping alpha and Lithium-7 particles and generating electrons produces a signal on the second wire which is detected and subsequently related to the number of neutrons impinging on the plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.