Study of performance of a plastic scintillator + MPPC system in low energy X-ray

Kento Torigoe, Tsunefumi Mizuno, Hiromitsu Takahashi, Yasushi Fukazawa

MPPC is a new type of photon-counting device which has several remarkable feautures such as low operational voltage and small size, although the noise is rather high.We evaluated the performance of a detector system using MPPC and plastic scintillator in the low-energy region.By using 55Fe radioisotope, we confirmed an energy threshold of  ~5 keV and non-linearity of ~30%. In this contribution, we give details of experiments and data analysis.