Radioactive areal density detector with scintillating receiver

Details Radioactive areal density detector with scintillating receiver Radioactive areal density detector with scintillating receiver

1992-02-21

1994-07-19

Dzierzynski, Paul M.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

378 54, 250308, G01N 2316, G01N 2306

Patent

active

053311639

ABSTRACT:
Apparatus for continuously determining the areal density along a length of a material includes a radioactive source and a scintillating receiver. In a first embodiment, the invention measures the thickness of a traveling web simultaneously at multiple points across its full width. The apparatus includes a radioactive source which extends across one side of the web. A detector array, on the opposite side of the web, detects the emission from the source through the web. The array includes scintillating fibers and multi- or single-anode photomultipliers which may be connected by a scintillating or non-scintillating fiber optic elements to the photomultiplier. In a second embodiment, the invention continuously detects the fill level of a plurality of containers as they are conveyed between the receiver and detector. A scintillating fiber receiver may have its fibers arranged either vertically or horizontally. When arranged horizontally, the fibers may be grouped and conduct photons to single anodes of a multi-anode photomultiplier tube to provide direct physical measurement of the fill level. Still another receiver includes a plastic scintillator sheet directly coupled to a photomultiplier tube.

REFERENCES:
patent: 3868510 (1975-02-01), Murata et al.
patent: 4682034 (1987-07-01), Saint et al.
patent: 4696023 (1987-09-01), Kuusi

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