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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Instrumentation IV

HK 14.1: Gruppenbericht

Montag, 28. März 2022, 16:00–16:30, HK-H3

Status of the CBM Micro Vertex Detector* — •Benedict Arnoldi-Meadows for the CBM-MVD collaboration — Goethe-Universität Frankfurt am Main

The Compressed Baryonic Matter (cbm) Experiment will be a core experiment of the future fair facility. Its Micro Vertex Detector will be composed from four stations and operate in the target vacuum. Its mission is to reject background in di-electron spectroscopy and to reconstruct weak decays of multi-strange baryons and open charm created in the up to 10 MHz p+p and up to 100 kHz Au+Au collisions of the fixed target experiment. The 0.3−0.5 %   X₀ thin stations will be equipped with 50 µm thin, highly granular Monolithic Active Pixel Sensors named mimosis, which are being designed by the iphc Strasbourg and will combine a spatial and time resolution of 5 µm and 5 µs, respectively, with a peak rate capability of 80 MHz/cm².

We discuss first results from tests of the mimosis-1 full size sensor prototype, which was irradiated with doses up to 3× 10¹⁴  n_eq/cm² and 5 MRad and tested hereafter at desy and the cern-sps. Moreover, the status of the R&D on detector integration will be summarized.

*This work has been supported by bmbf (05P19RFFC1), gsi, cremlinplus, and hfhf.