Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1976-05-06
1977-09-06
Borchelt, Archie R.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250389, G01T 118
Patent
active
040470407
ABSTRACT:
An improved ionization chamber type x-ray detector comprises a heavy gas at high pressure disposed between an anode and a cathode. An open grid structure is disposed adjacent the anode and is maintained at a voltage intermediate between the cathode and anode potentials. The electric field which is produced by positive ions drifting toward the cathode is thus shielded from the anode. Current measuring circuits connected to the anode are, therefore, responsive only to electron current flow within the chamber and the recovery time of the chamber is shortened.
The grid structure also serves to shield the anode from electrical currents which might otherwise be induced by mechanical vibrations in the ionization chamber structure.
REFERENCES:
patent: 2741709 (1956-04-01), Tirico et al.
patent: 3373283 (1968-03-01), Lansiart et al.
patent: 3676682 (1972-07-01), Falk
patent: 3836780 (1974-09-01), Amquist et al.
patent: 3898465 (1975-08-01), Zaklad et al.
Borchelt Archie R.
Cohen Joseph T.
General Electric Company
Haken Jack E.
Squillaro Jerome C.
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