Gain stabilization apparatus and methods for spectral gamma...

Details Gain stabilization apparatus and methods for spectral gamma... Gain stabilization apparatus and methods for spectral gamma...

2007-04-10

2007-04-10

Porta, David P. (Department: 2884)

Radiant energy

Photocells; circuits and apparatus

Reexamination Certificate

active

11050005

ABSTRACT:
Apparatus and methods for measuring gamma ray energy spectra wherein the gain of the measurement system is continuously and automatically adjusted to a standard gain. Gain of the system is controlled automatically through analysis of the measured energy spectra. Alternately, the gain of the system is controlled by the use of a calibration source and the operation of the system at a standard and amplified gain. Gain control can be improved further by combining both the spectral analysis and calibration source methodology. The system can be embodied in a wireline or logging-while-drilling borehole logging systems that measure naturally occurring or induced gamma ray spectra. The system can also be used in non-borehole applications including non-borehole gamma ray spectral systems such as computer-aided-tomography scan systems, security scanning systems, radiation monitoring systems, process control systems, analytical measurement systems using activation analysis methodology, and the like.

REFERENCES:
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patent: 5360975 (1994-11-01), Stoller
patent: 6087656 (2000-07-01), Kimmich et al.
patent: 6635878 (2003-10-01), Bertelsen
patent: 2005/0199794 (2005-09-01), Mickael

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