Darmstadt 2008 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.36: Poster

Donnerstag, 13. März 2008, 14:00–16:00, Poster C3

New Eventbuilding- and Trigger-Algorithms for the HADES-DAQ-Upgrade — •Johannes Roskoss, Daniel Kirschner, Andreas Kopp, Ming Liu, and Shuo Yang for the HADES collaboration — II. Physikalisches Institut, JLU Giessen, Heinrich-Buff-Ring 16, 35392 Gießen

For the ongoing upgrade of the HADES experiment, high data rates and sophisticated real time processing are foreseen. Thus, general purpose Compute Nodes based on FPGAs and modern network technologies have been designed. With this new computing power one is able to implement faster and more efficient algorithms designed in VHDL for the META, MDC and RICH detectors, as well as for the event building.

In this contribution we focus on the sectorwise event builder reconstructing events by combining different subevents from RICH, MDC, RPC, TOF. For the selection of electrons two new trigger algorithms are being implemented into the Compute Nodes: (a) a matching algorithm with the shower and the RPC detectors and (b) a new ring finder for the RICH detector. The status of the implementation will be reported.

Work supported in part by: BMBF 06 GI 179, GSI