Performance of PMTs for the JSNS 2 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.; Yu, I.; Jeon, H.; Jeon, S.; Jung, D. E.; Kim, S. B.; Kwon, E.; Lee, D. H.; Stancu, I.; Yeh, M.

doi:10.1088/1748-0221/15/07/t07003

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Performance of PMTs for the JSNS 2 experiment

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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 γ-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 JSNS 2 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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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.. 2020-07-06. Performance of PMTs for the JSNS 2 experiment. https://doi.org/10.1088/1748-0221%2F15%2F07%2Ft07003

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