Radiant energy – Coded record and readers; invisible radiant energy type
Patent
1979-04-11
1981-08-18
Smith, Alfred E.
Radiant energy
Coded record and readers; invisible radiant energy type
250262, G01V 500
Patent
active
042848865
ABSTRACT:
Method and apparatus, for use in the detection of inelastic neutron scattering gamma ray spectroscopy, effect data acquisition efficiency enhancement by operating a neutron generator such that a resulting output burst of fast neutrons is maintained for as long as practicably possible until a gamma ray is detected. Upon the detection of a gamma ray the generator burst output is terminated. Pulsing of the generator may be accomplished either by controlling the burst period relative to the burst interval to achieve a constant duty cycle for the operation of the generator or by maintaining the burst period constant and controlling the burst interval such that the resulting mean burst interval corresponds to a burst time interval which reduces contributions to the detected radiation of radiation occasioned by other than the fast neutrons.
REFERENCES:
patent: 3885154 (1975-05-01), Culver
patent: 3973131 (1976-08-01), Malone et al.
patent: 4055763 (1977-10-01), Antkiw
Tittman et al., "Laboratory Studies of a Pulsed Neutron Source Technique in Well Logging", Tech. Note 2061, J. Petroleum Tech., 1960.
Borst Stephen L.
Fields Carolyn E.
Garrana Henry N.
Schlumberger Technology Corporation
Smith Alfred E.
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