Performance of PMTs for the JSNS2 experiment

Understand

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.