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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Instrumentation VII

HK 26.2: Vortrag

Dienstag, 29. März 2022, 16:15–16:30, HK-H3

Precursor of the NOVEC-649 based cooling system for the CBM Micro Vertex Detector — •Franz A. Matejcek — Goethe-Universität Frankfurt

The Micro Vertex Detector of the Compressed Baryonic Matter Experiment (CBM) is placed 5 cm behind the target. The pixel detector with low material budget operates in vacuum. It consists of four stations equipped with 288 thin and large area CMOS sensors which produce a total of around 70 W of heat. To ensure their radiation hardness and detecting efficiency they have to be operated below -10 °C. The material budget-optimized cooling concept relies on efficient conductive cooling of the sensors, glued onto TPG carriers, providing very high thermal conductivity in the geomatrical acceptance. Actively cooled heat sinks outside the acceptance transfer the heat to the dedicated high-tech coolant NOVEC-649 (3M), featuring low viscosity in the temperature range of interest and good radiation hardness. This contribution will focus on the steps towards routine operation with NOVEC-649 and the evaluation of the thermal performance of a MVD prototype. This work has been supported by BMBF (05P19RFFC1), CremlinPLUS, GSI and HIC for FAIR.