A test of new large aperture photodetectors in a water Cherenkov detector

Yasuhiro Nishimura, Yuji Okajima, Miao Jiang, Daisuke Fukuda, Ryosuke Akutsu, Yusuke Suda, Seiko Hirota, Shoei Nakayama, Masato Shiozawa, Masashi Yokoyama, Yoshinari Hayato, Hidekazu Tanaka, Masayuki Nakahata, Tsuyoshi Nakaya, Masahiro Kuze, Yusuke Koshio, Akimichi Taketa

Research output: Contribution to journalConference article

Abstract

Several new photodetectors with high resolution and efficiency have been developed for a one megaton water Cherenkov detector, Hyper-Kamiokande, planned in Japan. A reliable photodetector is essential for such a long-term experiment aiming at the neutrino physics and the nucleon decay search. In 2013, a first proof test started using a 200 ton water Cherenkov detector in order to evaluate the feasibility of new photodetector techniques for Hyper-Kamiokande: high quantum efficiency (QE), a hybrid photodetector (HPD) and a new photomultiplier tube (PMT) with a box-and-line dynode. Eight HPDs with a 20 cm diameter were installed to the 200-ton water tank in advance of a 50 cm HPD. The QE of 50 cm Venetian-blind-dynode PMT used in SuperKamiokande was improved to 30% from 22%. Five of such high-QE PMTs were attached as well in 2013. Three 50 cm high-QE box-and-line PMTs joined in 2014 and showed high detection performance. In the 200-ton tank, in total 240 photodetectors including the 50 cm conventional Super-Kamiokande PMTs have been tested over a year. Sufficient performance to detect the single photoelectron was confirmed in the tank; 40-45% charge resolution in sigma and 5.1 nsec timing resolution at FWHM for box-and-line PMTs. New photodetectors were monitored over a year, and a stability of gain is confirmed in 2% level. The test allows to select the best candidate photodetector for Hyper-Kamiokande, with coming 50 cm high-QE HPDs.

Original languageEnglish
Article number017
JournalProceedings of Science
Volume6-9-July-2015
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event4th International Conference on New Photo-Detectors, PhotoDet 2015 - Moscow, Troitsk, Russian Federation
Duration: 2015 Jul 62015 Jul 9

Fingerprint

photometers
apertures
detectors
quantum efficiency
water
dynodes
boxes
photomultiplier tubes
Japan
photoelectrons
neutrinos
time measurement
physics
high resolution
decay

ASJC Scopus subject areas

  • General

Cite this

Nishimura, Y., Okajima, Y., Jiang, M., Fukuda, D., Akutsu, R., Suda, Y., ... Taketa, A. (2015). A test of new large aperture photodetectors in a water Cherenkov detector. Proceedings of Science, 6-9-July-2015, [017].

A test of new large aperture photodetectors in a water Cherenkov detector. / Nishimura, Yasuhiro; Okajima, Yuji; Jiang, Miao; Fukuda, Daisuke; Akutsu, Ryosuke; Suda, Yusuke; Hirota, Seiko; Nakayama, Shoei; Shiozawa, Masato; Yokoyama, Masashi; Hayato, Yoshinari; Tanaka, Hidekazu; Nakahata, Masayuki; Nakaya, Tsuyoshi; Kuze, Masahiro; Koshio, Yusuke; Taketa, Akimichi.

In: Proceedings of Science, Vol. 6-9-July-2015, 017, 01.01.2015.

Research output: Contribution to journalConference article

Nishimura, Y, Okajima, Y, Jiang, M, Fukuda, D, Akutsu, R, Suda, Y, Hirota, S, Nakayama, S, Shiozawa, M, Yokoyama, M, Hayato, Y, Tanaka, H, Nakahata, M, Nakaya, T, Kuze, M, Koshio, Y & Taketa, A 2015, 'A test of new large aperture photodetectors in a water Cherenkov detector', Proceedings of Science, vol. 6-9-July-2015, 017.
Nishimura Y, Okajima Y, Jiang M, Fukuda D, Akutsu R, Suda Y et al. A test of new large aperture photodetectors in a water Cherenkov detector. Proceedings of Science. 2015 Jan 1;6-9-July-2015. 017.
Nishimura, Yasuhiro ; Okajima, Yuji ; Jiang, Miao ; Fukuda, Daisuke ; Akutsu, Ryosuke ; Suda, Yusuke ; Hirota, Seiko ; Nakayama, Shoei ; Shiozawa, Masato ; Yokoyama, Masashi ; Hayato, Yoshinari ; Tanaka, Hidekazu ; Nakahata, Masayuki ; Nakaya, Tsuyoshi ; Kuze, Masahiro ; Koshio, Yusuke ; Taketa, Akimichi. / A test of new large aperture photodetectors in a water Cherenkov detector. In: Proceedings of Science. 2015 ; Vol. 6-9-July-2015.
@article{82ce69697166410eb941c7edccc67f23,
title = "A test of new large aperture photodetectors in a water Cherenkov detector",
abstract = "Several new photodetectors with high resolution and efficiency have been developed for a one megaton water Cherenkov detector, Hyper-Kamiokande, planned in Japan. A reliable photodetector is essential for such a long-term experiment aiming at the neutrino physics and the nucleon decay search. In 2013, a first proof test started using a 200 ton water Cherenkov detector in order to evaluate the feasibility of new photodetector techniques for Hyper-Kamiokande: high quantum efficiency (QE), a hybrid photodetector (HPD) and a new photomultiplier tube (PMT) with a box-and-line dynode. Eight HPDs with a 20 cm diameter were installed to the 200-ton water tank in advance of a 50 cm HPD. The QE of 50 cm Venetian-blind-dynode PMT used in SuperKamiokande was improved to 30{\%} from 22{\%}. Five of such high-QE PMTs were attached as well in 2013. Three 50 cm high-QE box-and-line PMTs joined in 2014 and showed high detection performance. In the 200-ton tank, in total 240 photodetectors including the 50 cm conventional Super-Kamiokande PMTs have been tested over a year. Sufficient performance to detect the single photoelectron was confirmed in the tank; 40-45{\%} charge resolution in sigma and 5.1 nsec timing resolution at FWHM for box-and-line PMTs. New photodetectors were monitored over a year, and a stability of gain is confirmed in 2{\%} level. The test allows to select the best candidate photodetector for Hyper-Kamiokande, with coming 50 cm high-QE HPDs.",
author = "Yasuhiro Nishimura and Yuji Okajima and Miao Jiang and Daisuke Fukuda and Ryosuke Akutsu and Yusuke Suda and Seiko Hirota and Shoei Nakayama and Masato Shiozawa and Masashi Yokoyama and Yoshinari Hayato and Hidekazu Tanaka and Masayuki Nakahata and Tsuyoshi Nakaya and Masahiro Kuze and Yusuke Koshio and Akimichi Taketa",
year = "2015",
month = "1",
day = "1",
language = "English",
volume = "6-9-July-2015",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - A test of new large aperture photodetectors in a water Cherenkov detector

AU - Nishimura, Yasuhiro

AU - Okajima, Yuji

AU - Jiang, Miao

AU - Fukuda, Daisuke

AU - Akutsu, Ryosuke

AU - Suda, Yusuke

AU - Hirota, Seiko

AU - Nakayama, Shoei

AU - Shiozawa, Masato

AU - Yokoyama, Masashi

AU - Hayato, Yoshinari

AU - Tanaka, Hidekazu

AU - Nakahata, Masayuki

AU - Nakaya, Tsuyoshi

AU - Kuze, Masahiro

AU - Koshio, Yusuke

AU - Taketa, Akimichi

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Several new photodetectors with high resolution and efficiency have been developed for a one megaton water Cherenkov detector, Hyper-Kamiokande, planned in Japan. A reliable photodetector is essential for such a long-term experiment aiming at the neutrino physics and the nucleon decay search. In 2013, a first proof test started using a 200 ton water Cherenkov detector in order to evaluate the feasibility of new photodetector techniques for Hyper-Kamiokande: high quantum efficiency (QE), a hybrid photodetector (HPD) and a new photomultiplier tube (PMT) with a box-and-line dynode. Eight HPDs with a 20 cm diameter were installed to the 200-ton water tank in advance of a 50 cm HPD. The QE of 50 cm Venetian-blind-dynode PMT used in SuperKamiokande was improved to 30% from 22%. Five of such high-QE PMTs were attached as well in 2013. Three 50 cm high-QE box-and-line PMTs joined in 2014 and showed high detection performance. In the 200-ton tank, in total 240 photodetectors including the 50 cm conventional Super-Kamiokande PMTs have been tested over a year. Sufficient performance to detect the single photoelectron was confirmed in the tank; 40-45% charge resolution in sigma and 5.1 nsec timing resolution at FWHM for box-and-line PMTs. New photodetectors were monitored over a year, and a stability of gain is confirmed in 2% level. The test allows to select the best candidate photodetector for Hyper-Kamiokande, with coming 50 cm high-QE HPDs.

AB - Several new photodetectors with high resolution and efficiency have been developed for a one megaton water Cherenkov detector, Hyper-Kamiokande, planned in Japan. A reliable photodetector is essential for such a long-term experiment aiming at the neutrino physics and the nucleon decay search. In 2013, a first proof test started using a 200 ton water Cherenkov detector in order to evaluate the feasibility of new photodetector techniques for Hyper-Kamiokande: high quantum efficiency (QE), a hybrid photodetector (HPD) and a new photomultiplier tube (PMT) with a box-and-line dynode. Eight HPDs with a 20 cm diameter were installed to the 200-ton water tank in advance of a 50 cm HPD. The QE of 50 cm Venetian-blind-dynode PMT used in SuperKamiokande was improved to 30% from 22%. Five of such high-QE PMTs were attached as well in 2013. Three 50 cm high-QE box-and-line PMTs joined in 2014 and showed high detection performance. In the 200-ton tank, in total 240 photodetectors including the 50 cm conventional Super-Kamiokande PMTs have been tested over a year. Sufficient performance to detect the single photoelectron was confirmed in the tank; 40-45% charge resolution in sigma and 5.1 nsec timing resolution at FWHM for box-and-line PMTs. New photodetectors were monitored over a year, and a stability of gain is confirmed in 2% level. The test allows to select the best candidate photodetector for Hyper-Kamiokande, with coming 50 cm high-QE HPDs.

UR - http://www.scopus.com/inward/record.url?scp=84988640243&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84988640243&partnerID=8YFLogxK

M3 - Conference article

VL - 6-9-July-2015

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 017

ER -