Encapsulated scintillation detector
US4383175A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1980 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Sep 30, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An encapsulated scintillation detector is disclosed in which a detector crystal or the like is encapsulated in a hermetically sealed housing having a light-transmitting window at one end. In some instances, the window is mounted in a window assembly by a compression seal established by the differential coefficient of expansion and contraction during the cooling of the assembly. In other instances, the window is chemically bonded to the ring with or without a compression seal. The window is mounted within a ring, which is in turn welded to the end of a tubular body portion of the housing along thin weld flanges to reduce the amount of weld heat which must be applied. A thermal barrier is provided to resist the flow of welding heat from the weld to the seal between the ring and the window. Such thermal barrier includes a zone of relatively thin section located between the weld zone and the seal through which weld heat must flow. The zone of relatively thin cross section is, in some embodiments, provided by a groove cut partially through the wall of the ring. A layer of low friction material such as Teflon is positioned between the tubular body and the crystal to minimize friction res…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.