학술논문
Performance of PMTs for the JSNS2 experiment
Document Type
Working Paper
Author
Park, J. S.; Furuta, H.; Maruyama, T.; Monjushiro, S.; Nishikawa, K.; Taira, M.; Jang, J. S.; Joo, K. K.; Kim, J. Y.; Lim, I. T.; Moon, D. H.; Seo, J. H.; Shin, C. D.; Zohaib, A.; Gwak, P.; Jang, M.; Ajimura, S.; Hiraiwa, T.; Nakano, T.; Nomachi, M.; Shima, T.; Sugaya, Y.; Cheoun, M. K.; Choi, J. H.; Pac, M. Y.; Dodo, T.; Hino, Y.; Suekane, F.; Ujiie, R.; Harada, M.; Hasegawa, S.; Kasugai, Y.; Meigo, S.; Sakai, K.; Sakamoto, S.; Suzuya, K.; Jordan, J. R.; Spitz, J.; Marzec, E.; Botran, M.; Kawasaki, T.; Konno, T.; Jang, H. I.; Kang, S. K.; Kim, E. J.; Seo, H.; Kim, S. Y.; Kim, W.; Niiyama, M.; Peeters, S. J. M.; Ray, H.; Rott, C.; Yu, I.; Jeon, H.; Jeon, S.; Jung, D. E.; Kim, S. B.; Kwon, E.; Lee, D. H.; Stancu, I.; Yeh, M.
Source
Subject
Language
Abstract
The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24\,m short baseline at J-PARC. The JSNS$^{2}$ inner detector is filled with 17 tons of gadolinium-loaded liquid scintillator (LS) and both the intermediate $\gamma$-catcher and the optically separated outer veto are filled with un-loaded LS. Optical photons from scintillation are observed by 120 Photomultiplier Tubes (PMTs). A total of 130 PMTs for the JSNS2 experiment were both donated by other experiments and purchased from Hamamatsu. Donated PMTs were purchased around 10 years ago, therefore JSNS$^{2}$ did pre-calibration of the PMTs including the purchased PMTs. 123 PMTs demonstrated acceptable performance for the JSNS$^{2}$ experiment, and 120 PMTs were installed in the detector.