Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1990-07-19
1991-10-22
Wieder, Kenneth A.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250253, 250255, 250374, 324464, H01J 4700, G01T 118
Patent
active
050598031
ABSTRACT:
An alpha particle counter for detecting individual alpha particles with a detection medium which is ambient air. Energetic alpha particles from radioactive decay products or other sources enter the detector volume through a durable wire screen window and ionize the ambient air detection medium. Ions of one polarity are driven to the central collector electrode by an electric field due to a battery imposed potential difference between the outer electrode and the central electrode and housing. One pulse is produced for each alpha particle losing its energy in the detector. The counting efficiency is substantially one hundred percent (100%) and is relatively noise free because the collector electrode is essentially at ground potential. The collector electrode signal is amplified in a field effect transistor (FET) emitter follower circuit, the output of which is fed to an external counter. Rugged construction and minimum maintenance are inherent features of this alpha particle detector.
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The Journal Friday Home Report, 6/2/89, R26 "Electronic Radon Detectors Are ffective"Dilly.
Anderson William H.
Regan Maura K.
The United States of America as represented by the Secretary of
Wieder Kenneth A.
Zelenka Michael
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