Speaker
Description
The T2K long-baseline neutrino oscillation experiment showed the strongest constraint on the CP violating phase that governs the matter/antimatter symmetry breaking in neutrino oscillation. For further improvement of the experimental sensitivity, T2K installed a novel high granular scintillator detector, called SuperFGD, to reduce systematics. It consists of about 2 millions of 1 cm$^3$ optically-isolated plastic scintillator cubes as a fully-active target. Scintillation light in the cubes is read out by about 56,000 channels in the three orthogonal directions with wave-length shifting fibers coupled to MPPCs. In addition to excellent tracking capability, this novel structure of SuperFGD allows us to perform calorimetry such as EM shower and detection of proton bragg peak. We report the detector design, construction, detection of first neutrino candidates and initial evaluation of detector performance toward the calorimetric analysis.
