Photon detection and counting system

Details Photon detection and counting system Photon detection and counting system

1976-09-22

1978-05-23

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250207, H01J 3912

Patent

active

040912779

ABSTRACT:
A photo multiplier tube is connected through a wave shaping and coupling cuit to an evaluation circuit; to provide for simple evaluation, for example, in an integrator, the coupling and wave shaping circuit includes an amplifier and a limiter, preferably a Zener diode connected through suitable coupling resistors to the integrator. Switches are provided to close the circuit from the photomultiplier tube (PMT) to the integrator, connected with a photon emission event trigger circuit so that, under non-event producing conditions, the integrator is disconnected from the PMT to prevent evaluating and possibly indicating spurious dark current noise pulses.

REFERENCES:
patent: 3393319 (1968-07-01), Randall et al.
patent: 3714441 (1973-01-01), Kreda
patent: 3721824 (1973-03-01), Bristol
patent: 3867628 (1975-02-01), Brown
patent: 3898452 (1975-08-01), Hertel
patent: 3947841 (1976-03-01), Tumolillo

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