Speaker
Description
The Tokai-to-Kamioka (T2K) experiment is a long-baseline neutrino oscillation experiment that sends high-intensity neutrino beams from J-PARC to the Super-Kamiokande detector, 295 km away. Recent T2K results indicated CP violation in the neutrino sector with a 90% confidence level. To enhance the experimental sensitivity, T2K completed its off-axis near detector upgrade in May 2024 and began operations to improve neutrino interaction measurements. At the core of this upgrade is the novel high-granularity scintillation detector, SuperFGD. This fully-active detector consists of approximately 2 million optically-isolated 1 cm plastic scintillator cubes. Scintillation light from the cubes is read out by around 56,000 channels across three orthogonal directions, using wavelength-shifting fibers coupled to MPPCs. SuperFGD provides excellent detection efficiency across a wide angular range, the ability to detect low-energy particles, and neutron detection capabilities. This report will cover the SuperFGD construction, commissioning and status of detector performance evaluations.
