Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.105: Poster

Thursday, March 19, 2009, 14:00–16:00, Audi-Max

New Trigger-Algorithms for the HADES-DAQ-Upgrade — •Johannes Roskoss, Andreas Kopp, Ming Liu, and Wolfgang Kühn — II. Physikalisches Institut, JLU Giessen, Heinrich-Buff-Ring 16, 35392 Gießen

For the 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 these one is able to implement faster and more efficient algorithms for di-electron recognition designed in VHDL for the HADES META, MDC and RICH detectors.

In this contribution we focus on trigger algorithms for the sectorwise subevents from RICH, MDC, Shower and 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 TOF detectors and (b) a modified ring finder for the RICH detector. Results of the software simulation of the trigger algorithm and the status of the hardware implementation will be reported.

This work was supported in part by BMBF 06 GI 179 and GSI GIKÜH.