Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Instrumentation 13

HK 41.5: Talk

Wednesday, March 25, 2015, 15:45–16:00, M/HS1

Read-out concepts for FPGA-based sub-systems within the CBM detector — •Jan Michel for the CBM collaboration — Goethe-Universität Frankfurt

The Compressed Baryonic Matter experiment (CBM) to be built at FAIR consists of several individual sub-detectors. Some are based on custom ASICs as front-ends. Others employ FPGA based modules where extensive slow control features can be implemented to ease the recording of data and to allow for fast detection of any kind of error condition. Being designed as a free-running data acquisition, the demands also include a synchronized read-out, i.e. distribution of a common clock signal to all modules. To reduce the complexity of wiring, this is to be done sharing the same optical fibers as the data transport. During the past years, TrbNet has been designed and is used in various experiments, initially for the HADES experiment at FAIR. This protocol can now serve as a platform for the CBM read-out. In several steps, synchronous links with deterministic latency, as well as a free-streaming data transport can be included. At the same time, modifications to improve bandwidth and provide compatibility to the CERN GBTx links used for ASIC based sub-systems are to be developed. This contribution shows the planned steps as well as the current status of development. This work has been supported by BMBF (05P12RFFC7), GSI and HIC for FAIR.