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.,Yu I.,Jeon H.,Jeon S., Jung D. E.,Kim S. B.,Kwon E.,Lee D. H., Stancu I.,Yeh M.

JOURNAL OF INSTRUMENTATION（2020）

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摘要

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 JSNS(2) experiment were either donated by other experiments or 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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关键词

Gamma detectors (scintillators, CZT, HPGe, HgI etc),Neutrino detectors

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