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Waterproofed photomultiplier tube assemblies for the Daya Bay reactor neutrino experiment

  • Author(s): Chow, K
  • Cummings, J
  • Edwards, E
  • Edwards, W
  • Ely, R
  • Hoff, M
  • Lebanowski, L
  • Li, B
  • Li, P
  • Lin, SK
  • Liu, D
  • Liu, J
  • Luk, KB
  • Miao, J
  • Napolitano, J
  • Ochoa-Ricoux, JP
  • Peng, JC
  • Qi, M
  • Steiner, H
  • Stoler, P
  • Stuart, M
  • Wang, L
  • Yang, C
  • Zhong, W
  • et al.
Abstract

Abstract In the Daya Bay Reactor Neutrino Experiment 960 20-cm-diameter waterproof photomultiplier tubes are used to instrument three water pools as Cherenkov detectors for detecting cosmic-ray muons. Of these 960 photomultiplier tubes, 341 are recycled from the MACRO experiment. A systematic program was undertaken to refurbish them as waterproof assemblies. In the context of passing the water leakage check, a success rate better than 97% was achieved. Details of the design, fabrication, testing, operation, and performance of these waterproofed photomultiplier-tube assemblies are presented.

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