Pulsed neutron logging system for inelastic scattering gamma ray

Details Pulsed neutron logging system for inelastic scattering gamma ray Pulsed neutron logging system for inelastic scattering gamma ray

1974-03-04

1976-02-17

Dixon, Harold A.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250270, 250354, G01V 500

Patent

active

039393437

ABSTRACT:
An illustrative embodiment of the invention includes methods for linearizing the gain of borehole gamma ray energy measurement apparatus. A known energy peak (or peaks) which is prominent in the gamma ray energy spectra of borehole measurements is monitored and any drift in its apparent location in the energy spectrum is used to generate an error voltage. The error voltage is applied in an inverse feedback manner to control the gain of system amplifiers to cancel the drift.

REFERENCES:
patent: 3226544 (1965-12-01), Clark
patent: 3270205 (1966-08-01), Ladd et al.
patent: 3560744 (1971-02-01), Jordan
patent: 3780301 (1973-12-01), Smith et al.
patent: 3829686 (1974-08-01), Schultz et al.

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