Global to push GA events into
skip to main content

Title: Radon detection

A detector for atmospheric radon using a long range alpha detector as its sensing element is described. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ions. These air ions are drawn by a fan through a second electrostatic filter which can be activated or deactivated, and into the long range alpha detector. With the second electrostatic filter activated, no air ions are allowed to pass, and the signal output from the long range alpha detector consists of only the electronic background. With the second electrostatic filter deactivated, air ions and cosmic rays will be detected. The cosmic ray contribution can be minimized by shielding. 3 figures.
Inventors:
; ;
Issue Date:
OSTI Identifier:
5253609
Assignee:
Dept. of Energy, Washington, DC () PTO; EDB-94-065113
Patent Number(s):
US 5281824; A
Application Number:
PPN: US 7-864746
Contract Number:
W-7405-ENG-36
Resource Relation:
Patent File Date: 7 Apr 1992
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 54 ENVIRONMENTAL SCIENCES; RADIATION DETECTORS; DESIGN; RADON; RADIATION MONITORING; ALPHA DETECTION; COSMIC RADIATION; ELECTRIC FILTERS; CHARGED PARTICLE DETECTION; DETECTION; ELEMENTS; FILTERS; FLUIDS; GASES; IONIZING RADIATIONS; MEASURING INSTRUMENTS; MONITORING; NONMETALS; RADIATION DETECTION; RADIATIONS; RARE GASES; 440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments; 540130 - Environment, Atmospheric- Radioactive Materials Monitoring & Transport- (1990-)