Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Instrumentierung IX

HK 49.4: Talk

Thursday, March 18, 2010, 14:45–15:00, HG IX

Data transport and Event Building in the Upgrade of the HADES DAQ — •Sergey Yurevich — GSI Helmholtzzentrum für Schwerionenforschung GmbH , Darmstadt, Germany

The HADES experiment relies on an efficient Data Acquisition system to reach the trigger rates from 20 kHz for heavy ion reactions up to 100 kHz for light collision systems. The main components of the DAQ system are designed to be capable of a total sustained throughput of 250 MB/s and a peak throughput of 500 MB/s. To achieve efficient transmission of large amounts of data we deploy Gigabit Ethernet using optical fibers as physical medium directly from the frontend at the detector.

Implementation and performance of the readout software, Gigabit Ethernet as well as parallel event building, mass storage strategy and run control are discussed.

Supported by BMBF(06FY171I), EU FP6