Development of the muon beam monitor for COMET experiment using SiC detector

The COMET Experiment aims to search for the muon-to-electron (\(\mu-e\)) conversion process, one of the lepton flavour violation processes, with a target single event sensitivity of \(\mathcal{O}(10^{-17})\). In COMET Phase-I, the muon beam monitor (MBM) using silicon carbide (SiC) detectors, jointly developed by KEK and AIST, will be installed to suppress background events caused by beam instability and enable detailed beam control. To confirm the response of the SiC detector to a pulsed muon beam, a beam test was conducted in J-PARC MLF in June 2024. As a result of the analysis, the muon signals were clearly observed, and sufficient linearity up to 35 incident muons was confirmed. For practical installation, the position of the SiC MBM was reconsidered. The downstream placement of the primary detector system was investigated with considerations of maintainability and scheduling. Simulation studies confirmed that the beam profile can be obtained even downstream and that by adjusting the sampling timing, the muon profile can be reasonably well reproduced.