Speaker
Description
The proposed Circular Electron Positron Collider (CEPC) imposes new challenges for the vertex detector in terms of pixel size and material budget. A Monolithic Active Pixel Sensor (MAPS) prototype, TaichuPix, based on a data-driven structure and a column drain readout architecture, has been implemented to achieve high spatial resolution and fast readout. In order to verify the spatial resolution of the baseline vertex detector, a detector system consists of telescope and 2 DUTs with different process was setup based on TaichuPix-3 chips and tested at DESY TB21 beamline in December 2022. This talk will presents the characterization of TaichuPix-3 chip, which include the experimental setup, cluster size, spatial resolution, detection efficiency and the corresponding results in different threshold. The offline analysis results indicates the spatial resolution better than 5μm and the detection efficiency better than 98%.
