Author/Authors :
Yokoyama، نويسنده , , M. and Nakaya، نويسنده , , T. and Gomi، نويسنده , , S. and Minamino، نويسنده , , James A. and Nagai، نويسنده , , N. and Nitta، نويسنده , , K. and Orme، نويسنده , , D. and Otani، نويسنده , , M. and Murakami، نويسنده , , T. and Nakadaira، نويسنده , , T. and Tanaka، نويسنده , , M.، نويسنده ,
Abstract :
In the T2K near neutrino detectors, about 60 000 Hamamatsu Multi-Pixel Photon Counters (MPPCs) will be used. The mass production of MPPC has started in February 2008. In order to perform quality assurance and to characterize each device, we have developed an MPPC test system. For each MPPC, gain, breakdown voltage, noise rate, photo detection efficiency, and cross-talk and after-pulse rate are measured as functions of the bias voltage and temperature. The design of the test system and the measurement procedure are described.
Keywords :
photodetector , mass production , APD , MPPC , quality control , Geiger-mode
