Gain stabilization for radioactivity well logging apparatus

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

1978-07-03

1980-09-02

Willis, Davis L.

Radiant energy

Calibration or standardization methods

250262, 250270, G01D 1800

Patent

active

042208513

ABSTRACT:
A new and improved gain stabilization system for radioactivity well logging apparatus of the type having a scintillation crystal and optically coupled photomultiplier in a sonde to detect radiation in the borehole and formation elements in response to neutron bombardment. The gain stabilization system includes a light emitting diode driven by a pulser and furnishing scintillations to the photomultiplier, resulting in a stabilization pulse which is furnished to electronic circuitry at the surface for stabilization purposes.

REFERENCES:
patent: 3179801 (1965-04-01), Scherbatskoy
patent: 3225195 (1965-12-01), Scherbatskoy
patent: 3337737 (1967-08-01), Eberhardt
patent: 3916685 (1975-11-01), Paap et al.
patent: 4053767 (1977-10-01), Kampfer et al.

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