Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1980-01-31
1981-11-17
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250445T, H01J 3928
Patent
active
043013686
ABSTRACT:
An improved ionizing radiation detector functioning in a proportional chamber mode, for use with X-ray tomography systems, is disclosed. The detector includes an elongated housing enclosing a chamber, a high pressure gas of great atomic weight and substantially opaque to x-radiation in the chamber, anodes and cathodes mounted in the chamber enclosed in the gas, and a voltage supply for supplying a positive voltage to the anode and a negative voltage to the cathode. The housing includes a window substantially transparent to x-radiation. The cathodes are plate-type cathodes and the anodes are composed of a plurality of metal wires extending parallel to the beam direction of the radiation to be detected at spaced intervals within a substantially claim, and the anodes and cathodes are parallel to each other. Means are provided to separately detect the voltage pulse on each anode wire.
REFERENCES:
patent: 3092747 (1963-06-01), Fine et al.
patent: 3703638 (1972-11-01), Allemand et al.
patent: 4075492 (1978-02-01), Boyd et al.
patent: 4190771 (1980-02-01), Kamei et al.
patent: 4193000 (1980-03-01), Shirayama et al.
Fields Carolyn E.
Hospital Physics Oy
Smith Alfred E.
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