Prototype of a dedicated multi-node data processing system for realtime trigger and analysis applications

Modern experiments in hadron physics like the HADES detector at GSI Darmstadt produce a large amount of data that has to be distributed, stored and analyzed. Analysis of this data is time consuming due to the large amount of data and the complex algorithms needed. One approach to these topics are custom made systems like the GEMN (Gigabit Ethernet Multi Node), designed and build in Giessen. The developed prototype features two Gigabit Ethernet connections and a TigerSHARC DSP. As test for the capabilities of this system the results of an example application in the context of the HADES experiment (rate at GSI) are presented: online correlation of the θ and φ information of rings in the RICH detector with fired wires in the drift chambers to filter out fake rings and by this reducing data rate to the storage system and saving time in the offline analysis. (orig.)