Gain stabilization circuit for photomultiplier tubes

Details Gain stabilization circuit for photomultiplier tubes Gain stabilization circuit for photomultiplier tubes

1989-01-06

1990-04-17

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250262, G01T 128

Patent

active

049183141

ABSTRACT:
A photomultiplier tube stabilization circuit is set forth. It is particularly useful in downhole logging tools exposed to increases in temperature and to overcome component aging and drift. A high voltage power supply is connected for operation of a photomultiplier tube. The output of the PMT is amplified and applied to a set of comparators forming logic levels associated with threshold values affiliated with the spectral peak anticipated for the output data. The high voltage power supply is controlled upwardly or downwardly to vary operation of the PMT by means of a relatively simple control loop utilizing the comparators and means forming a control voltage for the high voltage power supply.

REFERENCES:
patent: 4272677 (1981-06-01), Berthold et al.

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