Gain stabilization for radioactivity well logging apparatus

Details Gain stabilization for radioactivity well logging apparatus Gain stabilization for radioactivity well logging apparatus

1980-09-02

1982-08-31

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

250256, G01V 512

Patent

active

043465900

ABSTRACT:
An improved gain stabilization system for radioactivity well logging apparatus of the type having a scintillation crystal optically coupled to a photomultiplier, a light emitting diode driven by a pulser and furnishing scintillations to the photomultiplier located in a sonde resulting in a stabilization pulse which is provided to electronic circuitry at the surface for stabilization purposes. The improvement includes a temperature sensor located in the sonde and circuitry for maintaining the intensity of the light provided by the light emitting diode in response to the operation of the temperature sensor.

REFERENCES:
patent: 3225195 (1965-12-01), Scherbatskoy
patent: 3916685 (1975-11-01), Paap et al.

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