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arXiv · 1210.2765

Characterization of the Hamamatsu R11780 12 inch Photomultiplier Tube

J. Brack·B. Delgado·J. Dhooghe·J. Felde·B. Gookin·S. Grullon·J. R. Klein·R. Knapik·A. LaTorre·S. Seibert·K. Shapiro·R. Svoboda·L. Ware·R. Van Berg
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Abstract

Future large water Cherenkov and scintillator detectors have been proposed for measurements of long baseline neutrino oscillations, proton decay, supernova and solar neutrinos. To ensure cost-effectiveness and optimize scientific reach, one of the critical requirements for such detectors are large-area, high performance photomultiplier tubes (PMTs). One candidate for such a device is the Hamamatsu R11780, a 12" PMT that is available in both standard and high quantum efficiency versions. Measurements of the single photoelectron response characteristics, relative efficiencies of the standard and high quantum efficiency versions, a preliminary measurement of the absolute quantum efficiency of the standard quantum efficiency version, and a two-dimensional scan of the relative efficiency across the photocathode surface are presented in this paper. All single photoelectron investigations were made using a Cherenkov light source at room temperature at a gain of 1*10^7. These results show that the R11780 PMT is a excellent candidate for such large optical detectors, including the peak-to-valley ratios greater than 2, transit time spreads around 1.3 ns, and late-pulsing probabilities less than 5%.

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J. Brack, B. Delgado, J. Dhooghe, J. Felde, B. Gookin, S. Grullon, J. R. Klein, R. Knapik, A. LaTorre, S. Seibert, K. Shapiro, R. Svoboda, L. Ware, R. Van Berg. 2013-02-07. Characterization of the Hamamatsu R11780 12 inch Photomultiplier Tube. https://doi.org/10.1016/j.nima.2013.02.022

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