Abstract
We describe a technique for the absolute calibration of photomultipliers for the detection of lighthaving a Cherenkov spectrum. This technique utilizes the Chernekov light generated by single vertical cosmic ray muons in a horizontal ultraviolet transmitting glass plate. For use at a field station, a similar, but less time consuming, technique employing the ungated spectrum from a perspex (acrylic) cylinder is described. We discuss the use of temperature-stabilized LEDs for continuous monitoring of gain changes due to factors such as photomultiplier fatigue or temperature variations.
Published Version
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