Resistive anode image converter

Details Resistive anode image converter Resistive anode image converter

1975-03-03

1976-06-22

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

250372, G01T 116

Patent

active

039653544

ABSTRACT:
An apparatus is disclosed for imaging soft x-ray and ultraviolet electromagnetic radiation and charged particles. The apparatus includes a pair of microchannel electron multiplier plates that are connected in a cascaded chevron configuration which intercepts an incident beam of radiation or charged particles which are being imaged. Incident photons or charged particles strike the front surface of the chevron configuration causing emission of electrons. The electrons are accelerated by a voltage gradient and strike the inner side walls of the individual channels which comprise the microchannel electron multiplier plates causing emission of secondary electrons. Accelerated and multiplied secondary electrons impinge upon a resistive anode after they transverse the chevron configuration. A pulse position circuit converts the magnitude or transit time of the currents flowing from the point of impact of the electrons on the resistive anode to four contact electrodes mounted on their periphery of the resistive anode into the spatial coordinates of electron impact.

REFERENCES:
patent: 3715594 (1973-02-01), Drohan et al.
patent: 3891851 (1975-06-01), Fletcher

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