Photoelectron counting with an image intensifier tube and a self-scanned photodiode array

Physics – Optics

Scientific paper

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Charge Carriers, Counting Circuits, Image Intensifiers, Matrices (Circuits), Photodiodes, Photoelectrons, Fiber Optics, Image Tubes, Low Noise, Optical Coupling, Optical Scanners, Preamplifiers, Readout

Scientific paper

A self-scanned photodiode array was fiber-optically coupled to an ITT proximity-focused image intensifier tube. It was determined that a single photoelectron event produces 34,000 charge carriers in a photodiode. This charge is only a factor of 2.8 above the rms noise level of the preamplifier used in the tests, but standard charge-sensitive techniques are at least a factor of 12 better. The image tube and photodiode array combination can be packaged in a disk 5.1 cm in diameter and 2.6 cm thick.

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