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Title: Radon detection

A detector for atmospheric radon using a long range alpha detector as its sensing element. 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.
Inventors:
 [1];  [2];  [1]
  1. (Los Alamos, NM)
  2. (Ojo Caliente, NM)
Issue Date:
OSTI Identifier:
869135
Assignee:
United States Department of Energy (Washington, DC) LANL
Patent Number(s):
US 5281824
Contract Number:
W-7405-ENG-36
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
radon; detection; detector; atmospheric; range; alpha; sensing; element; electrostatic; filter; removes; ambient; air; allowing; atoms; pass; decay; cavity; allowed; creating; drawn; fan; activated; deactivated; signal; output; consists; electronic; background; cosmic; rays; detected; ray; contribution; minimized; shielding; signal output; decay cavity; electrostatic filter; ambient air; sensing element; alpha detector; range alpha; atmospheric radon; radon atoms; cosmic rays; allowing radon; /250/