Johnson Matthey Public Limited Company

Johnson Matthey Inc.

Colin Cunningham

Darrell Green

Stephen John Brookes

A radiation detection apparatus () is disclosed. The apparatus includes a housing (), a window () at least partially transparent to electromagnetic radiation in a first wavelength range and a photomultiplier tube () for generating an electrical output signal dependent on the intensity of the electromagnetic radiation. A resiliently deformable optical coupling () is located between the window and the photomultiplier tube for allowing at least some electromagnetic radiation passing through the window to enter the photomultiplier tube, and a scintillator elementconverts gamma radiation into visible light in the first wavelength range entering the photomultiplier tube.

Photomultiplier apparatus and radiation detector incorporating such apparatus

The invention comprises a radiation and contamination monitor for the monitoring of radiation and contamination. The instrument is intrinsically safe and comprises a radiation detector, a power source, a signal processor and a display, said power source, signal processor and display being housed within a sealed instrument housing formed from a non-metallic material which is resistant to static discharge. The detector may be housed in a detachable housing for contamination monitoring.

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Cleveland, United Kingdom

Colin Cunningham