Freiburg 2008 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 64: DAQ und Trigger II
T 64.5: Vortrag
Donnerstag, 6. März 2008, 17:50–18:05, KGI-HS 1108
Operational Monitoring tools of T/DAQ in ATLAS — •Sami Kama1, Judita Mamuzic1, Klaus Moenig1, and Christiane Risler2 — 1DESY — 2Humboldt Universität zu Berlin
With 14 TeV center of mass energy the Large Hadron Collider(LHC) is bringing high energy physics to TeV frontiers. The collisions at a luminosity of 1034cm−2s−1 at 14 TeV will result in approximately 1PB/s data in the detector. This huge amount data requires a high rejection rate triggering. In the ATLAS experiment this is achieved by a multi-level trigger system. A Hardware based Level1 trigger reduces the event rate to 75 kHz and software based Level2 trigger further reduces the event rate to 2-3 kHz. Final reduction to 200-300 Hz is done by the Event Filter(EF). This approach increases the complexity of monitoring since it is much harder to spot possible problems in such big and distributed systems. Two programs, Operational Monitoring Display (OMD) and Trigger Presenter(TriP), have been prepared for trigger monitoring tasks. TriP, being more physics oriented, displays event rates at different trigger chains and basic farm status information. OMD, on the other hand, is more oriented towards monitoring the status of the trigger and data acquisition systems. It is a highly configurable generic tool that can calculate statistics, process information about the trigger systems and provide this information to other systems for further analysis. It can display selected information as time series graphs, bar charts or create histograms from them. Its configuration can be changed at the run-time with a point and click interface. It can display both shifter level and expert level information easily.