Status Report for the 20th J-PARC PAC : A Search for Sterile Neutrino at J-PARC MLF (J-PARC E56, JSNS2)

Understand

On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC Spallation Neutron Source) experiment officially obtained stage-1 approval from J-PARC.

• We have since started to perform liquid scintillator R&D for improving energy resolution and fast neutron rejection.
• Also, we are studying Avalanche Photo-Diodes (SiPM) inside the liquid scintillator.
• In addition to the R&D work, a background measurement for the proton beam bunch timing using a small liquid scintillator volume was planned, and the safety discussions for the measurement have been done.