Ionization gas detector and tomo-scanner using such a detector

Details Ionization gas detector and tomo-scanner using such a detector Ionization gas detector and tomo-scanner using such a detector

1980-11-14

1983-01-04

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

G01T 118

Patent

active

043674097

ABSTRACT:
Ionization chamber detector making it possible to eliminate stray signals generally due to deformations of lines of force of the electrical field created between the electrodes of the ionization chamber, the deformations being located at the ends of the electrodes. The detector comprises an ionization chamber sealingly subdivided into at least two compartments by means of a dielectric material partition which is permeable to the ionizing radiation beam, the compartments being successively arranged on the path of the beam. The downstream compartment contains the measuring electrodes and the upstream compartments the guard electrodes, which are respectively coplanar and are raised to the same potentials as the measuring electrodes. The gases introduced into both compartments at the same high pressure have different atomic numbers.

REFERENCES:
patent: 3385988 (1968-05-01), Hyun
patent: 4075527 (1978-02-01), Cummings
patent: 4158774 (1979-06-01), Stokes
patent: 4253024 (1981-02-01), Peschmann

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