Radiant energy – Calibration or standardization methods
Patent
1994-01-03
1995-06-06
Hannaher, Constantine
Radiant energy
Calibration or standardization methods
2502694, 250374, 250261, G01V 510, G01T 300, H01J 4712
Patent
active
054224802
ABSTRACT:
A method and apparatus for verifying operation and achieving gain stabilization in a helium-3 proportional counter radiation detector utilized in nuclear logging operations. The detector includes a beta-minus particle source selected to provide a predetermined number of radiation counts for a specified time period to verify detector operation. The beta-minus source is further utilized to achieve detector gain stabilization by defining two energy windows on either side of the characteristic beta-minus energy peak. The difference in counts for the two energy windows is used to define an error signal which is applied to negative feedback loop in the detector electronics. The beta-minus source is preferably selected such that the type of source and activity is exempt from Nuclear Regulatory Commission licensing and safety requirements.
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Product Bulletin--Proportional Counters, Texlium He-3 Neutron Detectors, Texas Nuclear, a subsidiary of Ramsey Engineering, publication date unknown.
Halliburton Company
Hannaher Constantine
Montalvo Eugene R.
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