Patent
High-temperature well logging instrument with plastic scintillation element
TLDR
In this article, a high-temperature well logging instrument of the scintillation detector type includes a metal retaining cup with the SCI inside, capped at its open end by a silicon rubber pad that is transparent to photons generated by the scI in response to detected radiation.Abstract:
A high-temperature well logging instrument of the scintillation detector type includes a plastic scintillation element susceptible to softening and deformation at high operating temperatures. To maintain the shape of the scintillation element at such high temperatures, a metal retaining cup holds the scintillation element in its original shape. The retaining cup with the scintillation element inside is capped at its open end by a silicon rubber pad that is transparent to photons generated by the scintillation element in response to detected radiation. A biasing spring holds the end face of a photomultiplier tube against the silicon rubber pad so as to sandwich the pad between the photomultiplier tube and the open end of the metal retaining cup. Such a configuration maintains excellent optical coupling between the scintillation element and photomultiplier tube during high-temperature well logging.read more
Citations
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TL;DR: In this article, a unitized scintillation detector is presented, employing a scintillator element and a photomultiplier tube, which is further enclosed within a rigid shield.
References
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Patent
Shock-resistant scintillation detector
TL;DR: In this article, a unique scintillation detector unit is disclosed which employs a special light transfer and reflector means that encases and protects the scintillator crystal against high g forces.
Patent
Detector for deep well logging
TL;DR: In this article, the steel cylinder enclosing the sodium iodide scintillation crystal is provided with a tapered recess to receive a glass window which has a high transmittance at the critical wavelength and, for glass, a high coefficient of thermal expansion.
Patent
Gamma ray detector
Kazumasa Takagi,Tokuumi Fukazawa +1 more
TL;DR: In this paper, a gamma ray detector suitable for use in a positron CT and others is disclosed which comprises a scintillator formed of a single crystal of cerium activated gadolinium silicate which is expressed by a general formula Gd 2 (1-x-y) Ln 2x Ce 2y SiO 5 (where Ln indicates at least one element selected from a group consisting of yttrium and lanthanum, and x and y lie in ranges given by formulae 0≦x≦0.5 and 1×10 -
Patent
Window assembly for a deep well scintillation detector
TL;DR: A circular glass window in the form of a shallow, truncated cone having parallel faces is nested within and equidistantly spaced from a metal retaining ring defining at its inner periphery a shallow tapered, smooth-wall bore having a sloped sidewall to which the correspondingly sloped edge of the glass window is bonded by a thin layer of epoxy adhesive composition constituting an annular hermetic seal of constant predetermined thickness for optimum strength as mentioned in this paper.