New large aperture, hybrid photo-detector and photo multiplier tube for a gigantic water Cherenkov ring imaging detector

Seiko Hirota, Yasuhiro Nishimura, Yusuke Suda, Yuji Okajima, Masato Shiozawa, Shoei Nakayama, Hidekazu Tanaka, Yoshinari Hayato, Motoyasu Ikeda, Masayuki Nakahata, Masashi Yokoyama, Hiroaki Aihara, Atsuko Ichikawa, Akihiro Minamino, Kunxian Huang, Tsuyoshi Nakaya, Yoshihiko Kawai, Masatoshi Suzuki, Takayuki Ohmura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We are developing a 20-in. aperture high quantum efficiency photo-multiplier tube (PMT) and a hybrid photo-detector (HPD) for Hyper-Kamiokande which is a next generation underground large water Cherenkov detector. We have measured prototypes of 20-in. PMT with a high quantum efficiency photocathode, 30% at 400 nm, and 8-in. HPDs with a normal quantum efficiency photocathode, 22% at 400 nm, in a 200-ton water tank and checked their performance. The PMTs have a 2.7 ns (sigma) timing resolution and 43% (sigma) charge resolution for single photo-electron. Compared to PMTs, HPDs show a better performance with a 1.7 ns timing resolution and 32.

Original languageEnglish
Pages (from-to)152-155
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume766
DOIs
Publication statusPublished - 2014 Dec 1
Externally publishedYes

Keywords

  • Cherenkov ring imaging detector
  • High quantum efficiency
  • Hybrid photo-detector
  • Hyper-Kamiokande
  • Neutrino

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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  • Cite this

    Hirota, S., Nishimura, Y., Suda, Y., Okajima, Y., Shiozawa, M., Nakayama, S., Tanaka, H., Hayato, Y., Ikeda, M., Nakahata, M., Yokoyama, M., Aihara, H., Ichikawa, A., Minamino, A., Huang, K., Nakaya, T., Kawai, Y., Suzuki, M., & Ohmura, T. (2014). New large aperture, hybrid photo-detector and photo multiplier tube for a gigantic water Cherenkov ring imaging detector. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 766, 152-155. https://doi.org/10.1016/j.nima.2014.06.010