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  • Performance of PMTs for the JSNS2 experiment
    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; I Yu; Jeon, H; Jeon, S; Jung, D E; Kim, S B; Kwon, E; Lee, D H; Stancu, I; Yeh, M

    arXiv.org, 05/2020
    Paper, Journal Article

    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.

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