Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Instrumentierung

HK 21.4: Talk

Tuesday, March 18, 2014, 15:00–15:15, HZ 8

The Next Generation CBM MVD Front-end Electronics — •Michael Wiebusch, Jan Michel, and Joachim Stroth — Goethe-Universität, Frankfurt

The Micro Vertex Detector (MVD) for the CBM experiment is a highly granular precision tracking device. Due to the ambitious requirements regarding spatial resolution, radiation hardness, read-out speed and material budget, monolithic active pixel sensors (MAPS) are the most suited detector technology for this purpose. A full read-out chain for these sensors was designed and successfully prototyped in a test experiment at CERN/SPS in November 2012. However, it also revealed some weaknesses of the scheme, motivating a new and advanced revision of read-out electronics. In this scope, the system moved to a more capable FPGA platform and a next generation front-end electronics was designed and produced. Among others, the new design features a set of additional configuration and monitoring capabilities which will be used to optimize the concept of biasing and routing critical analog signals to the sensor. The main challenge is the distance between active electronics and the sensor which is constrained by radiation levels and the in-vacuum operation of the MVD. This contribution will present and evaluate the new front-end electronics design compared to the old concept, including first performance results. *This work is supported by BMBF (05P12RFFC7), HIC for FAIR, EMMI, and GSI.