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arxiv: 1705.10183 · v3 · pith:AS4CBLCJnew · submitted 2017-05-29 · ⚛️ physics.ins-det

In-situ characterization of the Hamamatsu R5912-HQE photomultiplier tubes used in the DEAP-3600 experiment

DEAP Collaboration: P.-A. Amaudruz , M. Batygov , B. Beltran , C. E. Bina , D. Bishop , J. Bonatt , G. Boorman , M. G. Boulay
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B. Broerman T. Bromwich J. F. Bueno A. Butcher B. Cai S. Chan M. Chen R. Chouinard S. Churchwell B. T. Cleveland D. Cranshaw K. Dering S. Dittmeier F. A. Duncan M. Dunford A. Erlandson N. Fatemighomi R. J. Ford R. Gagnon P. Giampa V. V. Golovko P. Gorel R. Gornea E. Grace K. Graham D. R. Grant E. Gulyev A. Hall A. L. Hallin M. Hamstra P. J. Harvey C. Hearns C. J. Jillings O. Kamaev A. Kemp M. Ku\'zniak S. Langrock F. La Zia B. Lehnert O. Li J. J. Lidgard P. Liimatainen C. Lim T. Lindner Y. Linn S. Liu R. Mathew A. B. McDonald T. McElroy K. McFarlane J. Mclaughlin S. Mead R. Mehdiyev C. Mielnichuk J. Monroe A. Muir P. Nadeau C. Nantais C. Ng A. J. Noble E. O'Dwyer C. Ohlmann K. Olchanski K. S. Olsen C. Ouellet P. Pasuthip S. J. M. Peeters T. R. Pollmann E. T. Rand W. Rau C. Rethmeier F. Reti\'ere N. Seeburn B. Shaw K. Singhrao P. Skensved B. Smith N. J. T. Smith T. Sonley R. Stainforth C. Stone V. Strickland B. Sur J. Tang J. Taylor L. Veloce E. V\'azquez-J\'auregui J. Walding M. Ward S. Westerdale R. White E. Woolsey J. Zielinski
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classification ⚛️ physics.ins-det
keywords characterizationdarkdetectorlightr5912-hqedeap-3600duringhamamatsu
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The Hamamatsu R5912-HQE photomultiplier-tube (PMT) is a novel high-quantum efficiency PMT. It is currently used in the DEAP-3600 dark matter detector and is of significant interest for future dark matter and neutrino experiments where high signal yields are needed. We report on the methods developed for in-situ characterization and monitoring of DEAP's 255 R5912-HQE PMTs. This includes a detailed discussion of typical measured single-photoelectron charge distributions, correlated noise (afterpulsing), dark noise, double, and late pulsing characteristics. The characterization is performed during the detector commissioning phase using laser light injected through a light diffusing sphere and during normal detector operation using LED light injected through optical fibres.

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