Development and measurement of new large-aperture photodetectors for Hyper-Kamiokande

Yasuhiro Nishimura, Yoshinari Hayato, Seiko Hirota, Isao Kametani, Masayuki Nakahata, Tsuyoshi Nakaya, Shoei Nakayama, Masato Shiozawa, Yusuke Suda, Hidekazu Tanaka, Keisuke Tateishi, Masashi Yokoyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Two types of new photodetectors are currently being developed with a large aperture, for use in the large water Cherenkov detector, Hyper-Kamiokande planned in Japan [1]: Hybrid Photo-Detector (HPD) of a 20-inch diameter size with an avalanche diode and a 20-inch Photomultiplier Tube (PMT) with a dynode upgrade to a box-and-line type. These are expected to have an excellent performance about timing and collection efficiency compared to a 20-inch PMT with a venetian blind dynode used in Super-Kamiokande. Also there is a possibility to improve quantum efficiency (QE) of these photodetectors from 22% to around 30% using the super-bialkali technique. A proof test in a smaller water Cherenkov detector is planned in advance for these photodetectors to determine the best candidate for Hyper- Kamiokande. Two prototypes of new photodetectors have already been manufactured for testing: the 8-inch HPD, and a 20-inch PMT with a higher QE of 30% compared with 22% of the 20-inch PMT used in Super-Kamiokande. These photodetectors were installed in a 200-ton water tank in summer 2013 for a proof of using test in a water Cherenkov detector. We report the specification of these photodetectors, a status and plan of the development and proof test.

Original languageEnglish
Title of host publication2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479905348
DOIs
Publication statusPublished - 2013 Jan 1
Externally publishedYes
Event2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013 - Seoul, Korea, Republic of
Duration: 2013 Oct 272013 Nov 2

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863

Conference

Conference2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
CountryKorea, Republic of
CitySeoul
Period13/10/2713/11/2

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Nishimura, Y., Hayato, Y., Hirota, S., Kametani, I., Nakahata, M., Nakaya, T., Nakayama, S., Shiozawa, M., Suda, Y., Tanaka, H., Tateishi, K., & Yokoyama, M. (2013). Development and measurement of new large-aperture photodetectors for Hyper-Kamiokande. In 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013 [6829483] (IEEE Nuclear Science Symposium Conference Record). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2013.6829483