Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 65: Combined Instrumentation Session: Silicon Pixel Detectors (joint session HK/T)

HK 65.5: Talk

Friday, April 3, 2020, 12:00–12:15, J-HS K

Experiences with long-term operation of a CBM-MVD prototype module. — •Michal Koziel for the CBM-MVD collaboration — Goethe Universität Frankfurt

The Compressed Baryonic Matter Experiment (CBM) is one of the core experiments of the future FAIR facility. It will explore the phase diagram of strongly interacting matter in the regime of high net baryon densities with numerous probes, among them open charm. The Micro Vertex Detector (MVD) will contribute to the secondary vertex determination on a 10 µ m scale, reconstruction of weak decays of multi-strange baryons, and low-momentum track reconstruction. The detector comprises four stations placed next to the target in vacuum. The stations will be populated with 50 µ m thin, highly granular customized CMOS Monolithic Active Pixel Sensors (MAPS) called MIMOSIS.

The integration of the mechanically fragile MAPS to vacuum compatible detector stations was studied within the PRESTO project. This project aimed for building a quarter of a detector station including the necessary vacuum compatible cooling system and the steering electronics. The study was carried out with elder MIMOSA-26 sensors, which are considered as a representative precursor of the final sensor technology. We report the outcome of this study and the observations made while operating PRESTO for several months under vacuum conditions.

*This work has been supported by BMBF ErUM-FSP C.B.M. (05P19RFFC1), GSI and HIC for FAIR.