Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Instrumentation
HK 34.4: Talk
Tuesday, March 5, 2013, 15:00–15:15, HSZ-405
Online software trigger at PANDA/FAIR — •Donghee Kang — Institut für Kernphysik, Universität Mainz, Germany
The PANDA experiment at the FAIR facility will employ a novel trigger-less readout concept. PANDA will have no first level hardware trigger and apply a high level software trigger to do fast event selection based on the physics properties of reconstructed events. A trigger-less data stream implies that an event selection requires track reconstruction and pattern recognition to be performed online, analysing data under real time condition at the event rates up to 40 MHz. A significant event rate reduction is required to reject effectively background events, while retaining the interesting events at the same time. The projected reduction factor is 10−3. Real time event selection in this environment is very challenging and rely on sophistcate algorithms in the software trigger. This presentation will show the implementation and performance tests of the online high level physics trigger algorithms. The impact of parameters such as momentum, mass resolution, and PID probability for the event filtering will be presented.