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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Instrumentation VIII

HK 36.1: Gruppenbericht

Mittwoch, 12. März 2025, 17:30–18:00, SR Exp1A Chemie

Status of the CBM Micro Vertex Detector* — •Julio Andary for the CBM-MVD collaboration — Goethe-Universität Frankfurt

The Compressed Baryonic Matter (CBM) Experiment will be a core experiment of the future FAIR facility. Its Micro Vertex Detector (MVD) will be composed of four planes, operating in the experiment’s target vacuum. The 0.3−0.5 % X₀ thin stations will be equipped with Monolithic Active Pixel Sensors MIMOSIS. This sensor is being developed by IPHC Strasbourg and will provide a spatial and temporal precision of 5 µm and 5 µs, respectively, with a peak rate capability of 80 MHz/cm².

This contribution will report on the progress made during the concluding phase of R&D. The last prototype full-scale pixel sensors MIMOSIS-2.1 has been successfully validated in several beam tests. Sensors featuring the novel 50 µm epitaxial layer showed very promising results. The sensor and detector integration has been substantially detailed, accompanied by CFD simulations on cooling performance, approaching the final engineering design. Besides the TRB-based stand-alone readout, most relevant for probe testing of the sensors, the CBM-DAQ compatible readout has been prototyped and will be commissioned in the next mCBM beam test, employing the new mMVD detector module. Detector performance simulations have been conducted to further characterize the final detector setup and update the response of the sensors to ionizing particles.

*This work has been supported by BMBF (05P21RFFC2, 05H24RF5), GSI, Eurizon, HGS-HIRe, and HFHF.