Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1984-10-17
1987-01-20
Anderson, Bruce C.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250256, 250363R, 250369, G01V 506, G01T 1208, G01T 1202
Patent
active
046381643
ABSTRACT:
For use in downhole logging tools responsive to gamma rays or x-rays, an improved scintillation device is set forth. In the preferred and illustrated embodiment, a scintillation crystal, typically sodium iodide (thallium activated), is utilized. It is an elongated, regular structure having two ends, and separate photomultiplier tubes (PMT) are attached at the separate ends. The two PMT output signals are supplied to a circuit which forms a signal adjusted or modified to compensate for loss of light energy arising during transmission through the scintillation crystal to the PMT's.
REFERENCES:
patent: 2711482 (1955-06-01), Goodman
patent: 3895232 (1975-07-01), Schneeberger
R. G. Astvatsaturov et al., "A Scintillation Counter 100 cm Long for Measurement of Ionization Losses of Relativistic Particles", Pribory i Tekhnika Eksperimenta, No. 2, (Mar.-Apr. 1975), pp. 62-65.
Nunley Allen
Sonne Darrell S.
Anderson Bruce C.
Beard William J.
Halliburton Company
Hannaher Constantine
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