X-ray detector

Details X-ray detector X-ray detector

1979-04-26

1981-06-09

Dixon, Harold A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250445T, 250381, 313 93, G01T 118

Patent

active

RE0306444

ABSTRACT:
An ionization chamber for use in determining the spatial distribution of x-ray photons in tomography systems comprises a plurality of substantially parallel, planar anodes separated by parallel, planar cathodes and enclosed in a gas of high atomic weight at a pressure from approximately 10 atmospheres to approximately 50 atmospheres. The cathode and anode structures comprise metals which are substantially opaque to x-ray radiation and thereby tend to reduce the resolution limiting effects of x-ray fluoresence in the gas.
In another embodiment of the invention the anodes comprise parallel conductive bars disposed between two planar cathodes.
Guard rings eliminate surface leakage currents between adjacent electrodes.

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"Ionization Chamber & Counters" by Rossi, Chapter II, McGraw Hill Book Co. 1949, pp. 20, 21, 97-115.

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