Performance of 50 cm Photomultiplier Tube for Hyper-Kamiokande

Yuto Maekawa, Chiori Fujisawa, Yasuhiro Nishimura

研究成果: Conference contribution

抄録

We developed a 50 cm-diameter photomultiplier tube (PMT) for Hyper-Kamiokande, which is a large water Cherenkov detector in Japan aiming at neutrino and nucleon-decay research by using forty thousand photosensors. The PMT, R12860 manufactured by Hamamatsu Photonics K.K. (Hamamatsu), achieved a double detection efficiency, reduced timing and charge resolutions as well as sufficient mechanical strength compared with a prior 50 cm PMT, R3600 for Super-Kamiokande. In 2018 over a hundred of the R12860 PMTs were installed in Super-Kamiokande, where we evaluated the performance together with the R3600 PMTs. The collection efficiency reached 95% with a higher quantum efficiency (QE) of 33% typical at peak of wavelength around 400 nm. Charge resolution was evaluated to be 27% in standard deviation and time resolution to be 1.5 nanoseconds in FWHM. Finally, noise reduction succeeded with clean materials and low dark count rate.

本文言語English
ホスト出版物のタイトル2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors, RTSD 2022
編集者Hideki Tomita, Tatsuya Nakamura
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781665421133
DOI
出版ステータスPublished - 2021
イベント2021 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2021 - Virtual, Yokohama, Japan
継続期間: 2021 10月 162021 10月 23

出版物シリーズ

名前2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors, RTSD 2022

Conference

Conference2021 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2021
国/地域Japan
CityVirtual, Yokohama
Period21/10/1621/10/23

ASJC Scopus subject areas

  • 原子力エネルギーおよび原子力工学
  • 健康情報学
  • 放射線学、核医学およびイメージング
  • 核物理学および高エネルギー物理学

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