Speaker
Description
The T2K experiment showed the strongest constraint on the CP violation phase in the lepton sector using neutrino oscillation and is seeking further improvement of the measurement sensitivity. To reduce systematic uncertainties, an upgrade of the near detector is ongoing. At the beginning of 2023, a new type of detector, called SuperFGD, is planned to be installed. SuperFGD is a high granular scintillator detector and has about 2 million scintillator cubes. Scintillation light is detected at MPPCs coupled to wave-length shifting fibers through the three orthogonal directions in the cubes and it has more than 55 thousand channels. For analysis such as cross-section, it is necessary to understand the detector properly. To calibrate this detector, it is considered to use cosmic muons as one of the approaches. We generated cosmic ray data using a Monte Carlo simulation and developed calibration methods. The methods are also useful for detector commissioning. In this poster presentation, the current status and prospects for the development of calibration and commissioning methods using cosmic muons will be given.