Detailed performance evaluation of a new 20-inch photomultiplier tube with a Box and Line dynode

Yuji Okajima, Yasuhiro Nishimura, Ryosuke Akutsu, Yusuke Suda, Miao Jiang, Seiko Hirota, Daisuke Fukuda, Masahiro Kuze, Masaki Ishitsuka, Masayuki Nakahata, Masato Shiozawa, Yoshinari Hayato, Shoei Nakayama, Hidekazu Tanaka, Masashi Yokoyama, Tsuyoshi Nakaya, Akihiro Minamino, Akimichi Taketa, Yoshihiko Kawai, Takayuki OhmuraMasatoshi Suzuki

研究成果: Conference article査読

抄録

For Hyper-Kamiokande, which is a future planned experiment using a 1 Mton water Cherenkov detector, several types of new photodetectors are under development. Box & Line photomultiplier tube is the leading candidate with high resolution and efficiency. By the improvement on quantum efficiency and photoelectron collection efficiency, the Cherenkov photon detection efficiency is twice as high as that of the photomultiplier tube used for Super-Kamiokande. The detailed performance of the Box & Line photomultiplier tube was evaluated to check its appropriateness for Hyper-Kamiokande, and it was confirmed to be sufficiently good. At single photoelectron level, a high resolution of 35% σ/μ in charge and 4.1 ns at FWHM in transit time was confirmed, superior to 53% and 7.3 ns, respectively, in case of the Super-K photomultiplier tube. The linearity range within 340 photoelectrons and high rate tolerance up to 87 MHz at single photoelectron are evaluated. The dark rate at room temperature is about 10 kHz typically.

本文言語English
論文番号015
ジャーナルProceedings of Science
6-9-July-2015
出版ステータスPublished - 2015 1 1
外部発表はい
イベント4th International Conference on New Photo-Detectors, PhotoDet 2015 - Moscow, Troitsk, Russian Federation
継続期間: 2015 7 62015 7 9

ASJC Scopus subject areas

  • 一般

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