Microgap x-ray detector
An x-ray detector is disclosed which provides for the conversion of x-ray photons into photoelectrons and subsequent amplification of these photoelectrons through the generation of electron avalanches in a thin gas-filled region subject to a high electric potential. The detector comprises a cathode (photocathode) and an anode separated by the thin, gas-filled region. The cathode may comprise a substrate, such a beryllium, coated with a layer of high atomic number material, such as gold, while the anode can be a single conducting plane of material, such as gold, or a plane of resistive material, such as chromium/silicon monoxide, or multiple areas of conductive or resistive material, mounted on a substrate composed of glass, plastic or ceramic. The charge collected from each electron avalanche by the anode is passed through processing electronics to a point of use, such as an oscilloscope. 3 figures.
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5308987; A
- Application Number:
- PPN: US 8-011637
- OSTI ID:
- 7184218
- Resource Relation:
- Patent File Date: 1 Feb 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
RADIATION DETECTORS
DESIGN
X-RAY DETECTION
CHARGE COLLECTION
ELECTRIC DISCHARGES
PHOTOCATHODES
CATHODES
DETECTION
ELECTRODES
MEASURING INSTRUMENTS
RADIATION DETECTION
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments