Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 63: Schwerionenkollisionen und QCD Phasen
HK 63.3: Vortrag
Donnerstag, 7. März 2013, 14:45–15:00, HSZ-204
The Cellular Automaton track finder at high track multiplicities — •Valentina Akishina1,3,4, Ivan Kisel1,2,3, Igor Kulakov1,2,3, and Maksym Zyzak1,3,4 — 1Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany — 2Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 4JINR Joint Institute for Nuclear Research, Dubna, Russia
The CBM experiment at FAIR is being designed to study heavy-ion collisions at extremely high interaction rates. The event selection has to be done online, therefore fast and efficient reconstruction algorithms are required. The Cellular Automaton (CA) track finder is fast and robust and thereby is used both for the online and offline track reconstruction in CBM. Since the CBM beam will have no bunch structure, but continuous, the reconstruction of time slices rather than events is needed. Measurements in this case will be 4D (x, y, z, t). In order to study the worst case scenario with no time measurment taken into account a number of minimum bias events (up to 100) was grouped into one, which was treated by the track finder as one event. The study has showed that CA track finder is stable with respect to track multiplicity: the efficiency of the algorithm decreases only by 4% for 100 minimum bias events in one group. The speed of the algorithm behaves as a second order polynomial with the number of track. Supported by FIAS, HICforFAIR and HGS-HIRe for FAIR. Das Projekt wird vom Hessischen Ministerium für Wissenschaft und Kunst gefördert.