Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Schwerionenkollisionen und QCD Phasen
HK 5.3: Vortrag
Montag, 17. März 2014, 14:30–14:45, HZ 7
Stability of the CBM CA based Track Finder with Respect to Number of Stations — Ivan Kisel1,2,3 and •Igor Kulakov1,2,3 for the CBM collaboration — 1Goethe-Universitat Frankfurt am Main — 2Frankfurt Institute for Advanced Studies — 3GSI Helmholtzzentrum fur Schwerionenforschung GmbH
The main tracking detector in the CBM experiment (FAIR, Darmstadt, Germany) is the Silicon Tracking System (STS). A number of conditions complicates the track reconstruction in STS: up to 1000 tracks per event, up to 107 events per second, non-homogeneous magnetic field, up to 85% fake combinatorial space points in double-sided strip detectors.
The cellular automaton (CA) based track reconstruction performs with efficiency of 98% and time of 12 ms with standard STS setup, consisting of 8 stations. The detector is placed in a dipole magnet and the space available for STS is limited. Therefore geometries with different number of stations required to be considered additionally.
Tests of the CA based reconstruction have been performed with data simulated in 7 different STS setups, changing number of STS stations from 4 to 8. The track reconstruction efficiencies for majority of the signal tracks stays on the level of 90-100% for all setups for minimum bias events. Momentum resolution stays on the same level of 1.3% for all STS setups, which has at least 70 cm length.
Supported by EU-FP7 HadronPhysics3, HIC for FAIR, HGS-HIRe for FAIR and Hessischen Ministerium fuer Wissenschaft und Kunst.