A method to enhance the sensitivity of photomultipliers for air Cherenkov telescopes

Details A method to enhance the sensitivity of photomultipliers for air Cherenkov telescopes A method to enhance the sensitivity of photomultipliers for air Cherenkov telescopes

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nimpa.504..109p&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 504, Issue 1-3, p. 109-115.

Physics

9

Scientific paper

A simple method to enhance the sensitivity of photomultipliers (PMTs) will be described. The method is based on applying onto the cathode window a specially prepared lacquer containing a wavelength shifter (WLS). A rapidly evaporating lacquer solvent results in a milky surface that acts as a photon scatterer. Applying the method to the ET 9116A PMT (hemispherical borosilicate window and rubidium-bialkali photocathode) resulted in a good sensitivity in the short-wave UV range as well as a />~20% increase above 330nm. Details of the study, the procedure and a simple model for the explanation of the enhancement are presented.

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