X-ray imaging with YSO scintillating crystal array

We developed an X-ray imager using Yttrium OxyorthoSilicate (Y₂SiO₅:Ce, YSO) scintillating crystal array and Multi-Anode PhotoMultiplier Tubes (MAPMTs) with the capability of fast X-ray counting and X-ray energy measurement. YSO scintillating crystal array has many advantages. First of all, there is no intrinsic background. We can detect the low energy X-ray photon without internal noise. The X-ray imager consists of detector, readout and readout electronics. The detector consists of 36 YSO scintillating crystal arrays of 8×8 pixels. This detector is read out by 36 64-channel MAPMTs with 36 SPACIROC ASICs in readout electronics. The imager has total 2304 YSO and MAPMT channels that make an array of 48×48 pixels. We will present the design and fabrication and performance of the X-ray imager.