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

Content Provider	IEEE Xplore Digital Library
Author	Nishimura, Y. Hayato, Y. Hirota, S. Kametani, I. Nakahata, M. Nakaya, T. Nakayama, S. Shiozawa, M. Suda, Y. Tanaka, H. Tateishi, K. Yokoyama, M.
Copyright Year	2013
Description	Author affiliation: Dept. of Phys., Kyoto Univ., Kyoto, Japan (Hirota, S.; Nakaya, T.; Tateishi, K.) \|\| Res. Center for Cosmic Neutrino, Univ. of Tokyo, Kashiwa, Japan (Nishimura, Y.; Kametani, I.) \|\| Kamioka Obs., Univ. of Tokyo, Hida, Japan (Hayato, Y.; Nakahata, M.; Nakayama, S.; Shiozawa, M.; Tanaka, H.) \|\| Dept. of Phys., Univ. of Tokyo, Tokyo, Japan (Suda, Y.; Yokoyama, M.)
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.
Starting Page	1
Ending Page	5
File Size	920490
Page Count	5
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829483
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photodetectors Storage tanks Detectors Cathodes Timing Physics Photonics
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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