The Multi Pixel Photon Counter (MPPC) is a novel photon sensor manufactured by Hamamatsu Photonics. It has many advantages compared to other photon sensors (compact size, low cost, high gain and detection efficiency, insensitivity to magnetic fields). In the GLD calorimeter group, study of the MPPC properties is extensively ongoing aiming to utilize it as the photon sensor of a finely segmented calorimeter. As a result of the study, we have confirmed that the current 1600 pixel MPPC has almost satisfactory gain, photon detection efficiency and noise rate for our requirements. We have also found that the dynamic range of the 1600 pixel MPPC can be enhanced thanks to its short recovery time, which is useful for calorimetric use. As a practical test for use at the GLD calorimeter, we have constructed a prototype of a scintillator-strip calorimeter and exposed it to 1-6 GeV positron beams and validated its performance. As a result of the test, we have observed a satisfactory linearity and energy resolution of the scintillator-strip calorimeter with full MPPC readout.
|Journal||Proceedings of Science|
|Publication status||Published - Dec 1 2007|
|Event||International Workshop on New Photon-Detectors, PD 2007 - Kobe, Japan|
Duration: Jun 27 2007 → Jun 29 2007
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