Caractérisation et modélisation de MIMOSIS : un capteur à pixels actifs monolithique basé sur la technologie CMOS

MIMOSIS is a CMOS Monolithic Active Pixel Sensor developed for the Micro Vertex Detector (MVD) of the Compressed Baryonic Matter (CBM) experiment at FAIR. The sensor must deliver 5 µm spatial resolution, 5 µs time resolution, handle peak hit rates of 80 MHz/cm², and withstand TID of 5 MRad and NIEL fluences of 7 × 1013 neq /cm2 . This thesis reports on a measurements to select the best-performing sensing-element for MIMOSIS from 20 pixel candidates realized in the MIMOSIS-1 and MIMOSIS-2 prototypes. 9 beam tests were conducted at CERN, DESY, and COSY, covering both non-irradiated and irradiated sensors. Finally, 2 pixel variants showed the best performance and full compliance with requirements. Additionally, this work completed a first step providing a next generation sensor response model for the GEANT-based simulation framework CBMRoot.