Speaker
Dr
Christophe Bronner
(Kamioka Observatory, ICRR, The University of Tokyo)
Description
Hyper-Kamiokande is the next generation water Cerenkov experiment in Japan, scheduled to start construction in 2020. This new experiment will build on the successful strategies developed in the currently running Super-Kamiokande experiment, and be able with unprecedented precision to study the oscillation of neutrinos from different sources and search for proton decay and neutrinos produced by supernovae. This increase in precision comes from the larger size of the detector, providing large statistics, and the use of high performance photo-detectors. In the baseline design, the inner part of the detector will be instrumented with 40000 20” PMTs. Two models are considered for this part: the nominal option is to use the R12860 produced by Hamamatsu Photonics, an improved version of the R3600 used in Super-Kamiodande, and micro-channel plate PMTs produced by North Night Vision Technology Co. are studied as an alternative option. We will present the developments on those two models to match the requirements and challenges of Hyper-Kamiokande: achieving high photon detection efficiency and timing resolution, while maintaining low noise level and being able to sustain the higher pressure coming from the increased water depth of this new detector. We will also report measurements of the performances of those PMTs and of their stability in time.
Primary authors
Dr
Christophe Bronner
(Kamioka Observatory, ICRR, The University of Tokyo)
Dr
Yasuhiro Nishimura
(Faculty of Science and Technology, Department of Physics, Keio University)
Co-authors
Mr
Junjie Xia
(ICRR, The University of Tokyo)
Dr
Takuya Tashiro
(Tokyo University of Science)
