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Title: 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.
Inventors:
; ;
Issue Date:
OSTI Identifier:
7184218
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-103340
Patent Number(s):
US 5308987; A
Application Number:
PPN: US 8-011637
Contract Number:
W-7405-ENG-48
Resource Relation:
Patent File Date: 1 Feb 1993
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 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