Author/Authors :
Abe، نويسنده , , Toshinori and Aihara، نويسنده , , Hiroaki and Iwasaki، نويسنده , , Masako and Fujimori، نويسنده , , Hiroki and Kasimura، نويسنده , , Keizo and Mineo، نويسنده , , Sogo and Uchida، نويسنده , , Tomohisa and Tanaka، نويسنده , , Manobu and Kawai، نويسنده , , Yoshihiko and Kyushima، نويسنده , , Hiroyuki and Suyama، نويسنده , , Motohiro and Shiozawa، نويسنده , , Masato، نويسنده ,
Abstract :
This paper reports on the R&D status of a large-aperture Hybrid Avalanche Photo-Detector (HAPD). We have developed a 13-inch aperture HAPD and its readout system. The HAPD is a photo-detector expected to replace the photomultiplier tube (PMT) in next-generation imaging water Cherenkov detectors such as Hyper Kamiokande. We will present the recent progress made in readout system development. The readout system involves a fast sampling device. The sampling depth (number of cells) has been extended to 256 from 64 in order to measure longer waveform length. The variation in AC gain is now fixed and the input analog bandwidth improved.
