Single and double grid long-range alpha detectors

Details Single and double grid long-range alpha detectors Single and double grid long-range alpha detectors

1991-10-08

1993-03-16

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250374, 250375, 250379, G01T 118, H01J 4702

Patent

active

051947374

ABSTRACT:
Alpha particle detectors capable of detecting alpha radiation from distant sources. In one embodiment, a voltage is generated in a single electrically conductive grid while a fan draws air containing air molecules ionized by alpha particles through an air passage and across the conductive grid. The current in the conductive grid can be detected and used for measurement or alarm. Another embodiment builds on this concept and provides an additional grid so that air ions of both polarities can be detected. The detector can be used in many applications, such as for pipe or duct, tank, or soil sample monitoring.

REFERENCES:
patent: 2499830 (1950-03-01), Molloy
patent: 2532956 (1950-12-01), Simpson
patent: 2599922 (1952-06-01), Kanne
patent: 2979620 (1961-04-01), Bradshaw et al.
patent: 4114088 (1978-09-01), Laws
patent: 4238678 (1980-12-01), Castleman et al.
patent: 4262203 (1981-04-01), Overhoff
patent: 4837440 (1989-06-01), Burtscher et al.
patent: 4977318 (1990-12-01), Ilmasti et al.
patent: 4994748 (1991-02-01), Rasulev et al.
patent: 5059803 (1991-10-01), Kronenberg

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