Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1992-04-07
1994-01-25
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250379, H01J 4702
Patent
active
052818241
ABSTRACT:
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.
REFERENCES:
patent: 3084255 (1963-04-01), Brinkerhoff et al.
patent: 5184019 (1993-02-01), MacArthur et al.
Allander Krag S.
Bounds John A.
MacArthur Duncan W.
Gaetjens Paul D.
Hannaher Constantine
Moser William R.
The United States Department of Energy
Wyrick Milton D.
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