Design and Performance of MPPC-array Readout System for the WAGASCI Neutrino Detector

Abstract

We have developed a readout system for the WAGASCI neutrino detector at J-PARC. A WAGASCI module uses 1280 MPPC channels to detect light from scintillators via wavelength shifting (cid:12)bers. The frontend electronics is based on Silicon PM Integrated Read-Out Chip (SPIROC), which has large dynamic range, low noise, low power consumption, high precision and large number of readout channels. The data taking began in October 2017. All of the MPPC gains were stable within (cid:6) 10% for about four months of operation. After the (cid:12)rst commissioning, the timing resolution was improved by an update of (cid:12)rmware.