X-ray imaging apparatus with control mesh

Details X-ray imaging apparatus with control mesh X-ray imaging apparatus with control mesh

1977-09-19

1979-05-22

Church, Craig E.

Radiant energy

Source with charged plate-type detector

250315A, G03B 4116

Patent

active

041561406

ABSTRACT:
Electrostatic x-ray imaging apparatus of the type having a gas-filled chamber bounded by a photocathode and a charge-receiving sheet anode has a control mesh positioned in the gas-filled gap and maintained at a positive voltage with respect to the cathode to facilitate high avalanche amplification and has a voltage between the mesh member and the anode chosen in the plateau region of the x-ray photocurrent versus voltage curve, to achieve a nearly constant efficiency of charge collection at the anode, independent of accumulation of charge thereat.

REFERENCES:
patent: 3932750 (1976-01-01), Reiss
patent: 3969624 (1976-07-01), Van Breson
patent: 4039830 (1977-08-01), Yang

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