An Improved Light Pipe for the Scanning Electron Microscope

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Abstract
Results from the present study show that a quartz light pipe, properly ground and polished with a liquid scintillator solution applied to the tip, gives superior results by lowering the photomultiplier (P.M.) voltage. Perhaps even a greater advantage is that the maintenance procedures allow this type of light pipe to be used indefinitely compared to the approximate six month lifetime of the standard light pipes. Furthermore, the interface problem as in ``snap on'' tips has been alleviated by a bonded surface between scintillator material and light pipe.

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