MIMOSIS is a CMOS Monolithic Active Pixel Sensor developed to equip the Micro Vertex Detector of the Compressed Baryonic Matter (CBM) experiment at FAIR/GSI. The sensor will combine an excellent spatial precision of 5μm with a time resolution of 5μs and provide a peak hit rate capability of ∼80MHz/cm2. To fulfill its task, MIMOSIS will have to withstand ionising radiation doses of ∼5MRad and fluences of ∼7×1013neq/cm2 per year of operation. This paper introduces the reticle size full feature sensor prototype MIMOSIS-2.1, which was improved with respect to earlier prototypes by adding on-chip grouping circuts and by improving the analog power grid. Moreover, it features for a first time a 50μm epitaxial layer, which is found to improve the performances of the non-irradiated device significantly. We discuss the in beam sensor performances as measured during beam tests at the CERN-SPS.
@article{arxiv.2502.05303,
title = {In beam performances of the MIMOSIS-2.1 CMOS Monolithic Active Pixel Sensor},
author = {M. Deveaux and Ali-Murteza Altingun and Julio Andary and Benedict Arnoldi-Meadows and Jerome Baudot and Gregory Bertolone and Auguste Besson and Norbert Bialas and Christopher Braun and Roma Bugiel and Gilles Claus and Claude Colledani and Hasan Darwish and Andrei Dorokhov and Guy Dozière and Ziad El Bitar and Ingo Fröhlich and Mathieu Goffe and Benedikt Gutsche and Abdelkader Himmi and Christine Hu-Guo and Kimmo Jaaskelainen and Oliver Keller and Michal Koziel and Franz Matejcek and Jan Michel and Frederic Morel and Christian Müntz and Hung Pham and Christian Joachim Schmidt and Stefan Schreiber and Matthieu Specht and Joachim Stroth and Eva-dhidho Taka and Isabelle Valin and Roland Weirich and Yüe Zhao and Marc Winter},
journal= {arXiv preprint arXiv:2502.05303},
year = {2025}
}