Berlin 2005 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 41: Instrumentation und Anwendungen

HK 41.2: Talk

Wednesday, March 9, 2005, 14:15–14:30, TU MA041

New Test Results for the ALICE High Level Trigger — •Timm M. Steinbeck, Heinz Tilsner, and Volker Lindenstruth — Kirchhoff Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, D-69120 Heidelberg, Germany

The ALICE heavy-ion experiment’s High Level Trigger (HLT) will consist of a PC cluster with 400 to 500 nodes. Approximately 250 of these will receive data produced by front-end electronics in the detectors via the DAQ system. Further data which is derived by the HLT from its input data can be sent to DAQ in addition to the detectors’ data. In the HLT processing cluster the data is transported by a fault tolerant data transport software framework that easily allows to construct different data flow configurations in the HLT. This software and the two interfaces to the DAQ system for receiving and sending have been tested and used in several scenarios. Results will be presented of three of these scenarios: Two testbeam participations as well as one larger scale integration test of TPC and DiMuon detector specific HLT software components. Work on the ALICE High Level Trigger has been financed by the German Federal Ministry of Education and Research (BMBF) as part of its program “Förderschwerpunkt Hadronen- und Kernphysik - Großgeräte der physikalischen Grundlagenforschung”.