@inbook{doi:10.7566/JPSCP.45.011109,

title = {CyDet Trigger System for COMET Phase-I},
booktitle = {Proceedings of the 4th J-PARC Symposium 2024},
chapter = {},
pages = {},
doi = {10.7566/JPSCP.45.011109},
URL = {https://journals.jps.jp/doi/abs/10.7566/JPSCP.45.011109},
eprint = {https://journals.jps.jp/doi/pdf/10.7566/JPSCP.45.011109},
    abstract = { The COMET Phase-I experiment seeks to detect a muon-to-electron conversion whose branching ratio becomes observable only in new physics, targeting a sensitivity 100 times better than the current upper limit on the branching ratio. Utilizing the high-intensity proton beam of J-PARC, the experiment must address challenges such as high detector hit rates and high-radiation environments, which could cause significant dead time in data acquisition. To overcome these challenges, multi-stage online hardware triggering algorithms have already been developed, and trigger boards have been produced. The distance between a Cylindrical Drift Chamber (CDC) with its readout boards and the trigger front-end boards is approximately 5 m to keep the trigger boards away from the high-radiation area. In this paper, the full electronics system was connected with 5 m long cables, and the stability was tested over an 18-hour monitoring period, achieving live times of over 99\% in the experiment, assuming 3 min of dead time due to communication errors. }
}