Beam-edge Photon Detector with Low Sensitivity to Neutrons for the KOTO Experiment

10th International Conference on Kaon Physics

Shinohara, Satoshi^1

Department of Physics, Faculty of Science, Kyoto University Kitashirakawa, Oiwake-cho, Sakyo-ku, Kyoto, Japan^1

关键词: Beam edge;    Low sensitivity;    Photon counters;    Photon detector;    Photon veto detector;    Physics data;    Stable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/800/1/012044/pdf
DOI  :  10.1088/1742-6596/800/1/012044

来源: IOP

【 摘 要 】

An acrylic Cherenkov counter named Beam Hole Guard Counter (BHGC) was developed as a photon-veto detector to cover the detection gap in the edge of the in-beam photon counter just outside of the beam core in the KOTO experiment. The KOTO experiment took physics data with the BHGC in 2015. We confirmed the stable operation and the expected performance of the BHGC. Therefore, the gap induced background can be rejected with the BHGC.