中国物理学会高能物理分会第十一届全国会员代表大会暨学术年会

The proposed Circular Electron Positron Collider (CEPC) imposes new challenges for the vertex detector in terms of high resolution, low material, fast readout and low power. A Monolithic Active Pixel Sensor (MAPS) prototype, called TaichuPix, based on a data-driven structure and a column drain readout architecture, has been implemented to achieve fast readout. This poster presents the charge collection performance of TaichuPix2 by using a radioactive source. At the same time, an infrared laser setup was used to verify the spatial resolution, which indicates a spatial resolution better than 5 µm.