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Title: Wide-range radioactive-gas-concentration detector

Abstract

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.

Inventors:
Issue Date:
OSTI Identifier:
5038181
Application Number:
ON: DE82020866
Assignee:
Dept. of Energy ERA-07-060125; EDB-82-157504
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 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

Citation Formats

Anderson, D.F. Wide-range radioactive-gas-concentration detector. United States: N. p., 1981. Web.
Anderson, D.F. Wide-range radioactive-gas-concentration detector. United States.
Anderson, D.F. Mon . "Wide-range radioactive-gas-concentration detector". United States.
@article{osti_5038181,
title = {Wide-range radioactive-gas-concentration detector},
author = {Anderson, D.F.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {11}
}