PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Detectors for Future Facilities (incl. HL-LHC), R&D, Novel Techniques
Preparation of large aperture Photo-Detectors for the Hyper-Kamiokande
T. Tashiro* on behalf of the Hyper-Kamiokande Collaboration
*corresponding author
Full text: pdf
Pre-published on: February 02, 2021
Published on:
Hyper-Kamiokande is a large water Cherenkov detector in Japan to explore various neutrino physics and discover a nucleon decay. Its construction started in 2020 and the mass production of a large aperture photo-detector is planned from the end of 2020. We developed a photomultiplier tube (PMT) with a 50 cm diameter, R12860 by Hamamatsu Photonics K.K. and installed over a hundred of them into Super-Kamiokande. A hundred PMTs were evaluated in Super-Kamiokande and compared with an R3600 PMT for Super-Kamiokande. It was confirmed that the resolutions and detection efficiency are doubly improved. A noise reduction of the PMT was also achieved with suppressing radioactive contamination in the glass. In addition, another large aperture photodetector using a micro channel plate was developed. A part of the detection wall with the optical acrylic window and several designs of a shockwave prevention cover are constructed for a test to demonstrate a coming construction work. A PMT calibration facility is also under preparation. We present the recent development and improved performance of the large-aperture photo-detectors.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.