Encapsulated scintillation detector

Patent · Tue May 10 04:00:00 EDT 1983

OSTI ID:5964701

Toepke, I L

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 resisting relative axial movement created by differential coefficients of thermal expansion.

• Assignee: Bicron Corp
• Patent Number(s): US 4383175
• OSTI ID: 5964701
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DESIGN
DIFFUSION BARRIERS
ENCAPSULATION
ENERGY TRANSFER
HEAT TRANSFER
MEASURING INSTRUMENTS
OPENINGS
RADIATION DETECTORS
SCINTILLATION COUNTERS
TUBES
WINDOWS