Event counting alpha detector

Details Event counting alpha detector Event counting alpha detector

1994-11-01

1996-08-27

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250374, 250379, 250382, 250435, G01T 118, G01T 1185

Patent

active

055503810

ABSTRACT:
An electrostatic detector for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An electric field is produced between the pin and the inside enclosure. Air ions produced by collision with alpha particles inside the decay volume defined by the inside enclosure are attracted to the pin and the inner enclosure. With low alpha concentrations, individual alpha events can be measured to indicate the presence of radon or other alpha radiation. In another embodiment, an electrical field is produced between parallel plates which are insulated from a single decay cavity enclosure.

REFERENCES:
patent: 2892091 (1959-06-01), Sawle
patent: 2972678 (1961-02-01), Anton
patent: 4262203 (1981-04-01), Overhoff
patent: 4894535 (1990-01-01), Madnick et al.
patent: 4972081 (1990-11-01), Dunbeck Sr.
patent: 5003176 (1991-03-01), Tanaka et al.
patent: 5026986 (1991-06-01), Hurst
patent: 5029248 (1991-07-01), Miyake
patent: 5281824 (1994-01-01), MacArthur et al.

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