Method and apparatus for measuring neutron characteristics of ma

Details Method and apparatus for measuring neutron characteristics of ma Method and apparatus for measuring neutron characteristics of ma

1980-06-26

1982-02-23

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250270, G01V 500

Patent

active

043170340

ABSTRACT:
A pulsed source of fast neutrons and a radiation detector system are utilized in a well logging instrument, the detector being responsive to the thermal neutron population decay rate. The inverse of the decay rate is proportional to the measured macroscopic neutron absorption cross-section (Sigma). A Sigma is calculated by taking the natural logarithm of the ratio of the detected radiation counts occurring within two measurement intervals of fixed duration and starting at a fixed time after the neutron burst. This Sigma measurement provides a feedback voltage which is used in altering the starting time of a single measurement interval in a subsequent source pulsing cycle to provide a measured Sigma value.

REFERENCES:
patent: 3379882 (1968-04-01), Youmans
patent: 3379884 (1968-04-01), Youmans
patent: 3566116 (1971-02-01), Nelligan
patent: 4046764 (1977-09-01), Marquis
patent: 4223218 (1980-09-01), Jacobson
patent: 4267447 (1981-05-01), Johnstone

Affiliated with

Also associated with

Rating

Method and apparatus for measuring neutron characteristics of ma does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for measuring neutron characteristics of ma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring neutron characteristics of ma will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1775384