[12p-D209-1~17] 2.2 Detection systems

△ [12p-D209-9] [Highlight]Development of Cherenkov-radiator-integrated MCP-PMT

〇Ryosuke Ota^1,2, Kyohei Nakajima², Izumi Ogawa², Yoichi Tamagawa², Hideki Shimoi¹, Motohiro Suyama¹, Tomoyuki Hasegawa³ (1.Hamamatsu Photonics, 2.Fukui Univ., 3.Kitasato Univ.)

Keywords:PMT, Cherenkov photon

To develop a reconstruction-less PET, the PET detectors should have a coincidence time resolution of 20-35 ps. Cherenkov emission plays an important role to enhance the timing performance of the detector, the number of Cherenkov photons generated by a 511 keV gamma ray is only 30 at most. To effectively detect the Cherenkov photons, an MCP-PMT where the Cherenkov radiator is integrated was developed. Timing performance of the detector was investigated by conducting an experiment, where a ^{22}Na point source collimated by a Pb collimator of 1.0 mm φ × 50 mm was located at the center of the detectors. As a result, the coincidence time resolution of 41.7 ps was obtained.