Wide-range radioactive-gas-concentration detector
A wide-range radioactive-gas-concentration detector and monitor capable of measuring radioactive-gas concentrations over a range of eight orders of magnitude is described. The device is designed to have an ionization chamber sufficiently small to give a fast response time for measuring radioactive gases but sufficiently large to provide accurate readings at low concentration levels. Closely spaced parallel-plate grids provide a uniform electric field in the active region to improve the accuracy of measurements and reduce ion migration time so as to virtually eliminate errors due to ion recombination. The parallel-plate grids are fabricated with a minimal surface area to reduce the effects of contamination resulting from absorption of contaminating materials on the surface of the grids. Additionally, the ionization-chamber wall is spaced a sufficient distance from the active region of the ionization chamber to minimize contamination effects.
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE82020866
- OSTI ID:
- 5038181
- Country of Publication:
- United States
- Language:
- English
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Wide range radioactive gas concentration detector
A DEVICE TO MEASURE LOW LEVELS OF RADIOACTIVE CONTAMINANTS IN ULTRA-CLEAN MATERIALS
Related Subjects
FLOW COUNTERS
DESIGN
GASES
RADIATION MONITORING
RADIATION MONITORS
TRITIUM
MONITORING
RADIOACTIVITY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
FLUIDS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MONITORS
NUCLEI
ODD-EVEN NUCLEI
RADIATION DETECTORS
RADIOISOTOPES
YEARS LIVING RADIOISOTOPES
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments