Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 29: Schwerionenkollisionen und QCD Phasen
HK 29.7: Talk
Wednesday, March 21, 2012, 15:45–16:00, P 5
Standalone FLES Package for Event Reconstruction and Selection in CBM — Ivan Kisel1, •Igor Kulakov2,3, and Maksym Zyzak2,3 — 1GSI Helmholtzzentrum fur Schwerionenforschung GmbH — 2Goethe-Universitat Frankfurt am Main — 3National Taras Shevchenko University of Kyiv, Ukraine
The main objective of the CBM experiment at FAIR is the measurement of extremely rare signals, therefore collision rates up to 10 MHz and correspondent First Level Event Selection (FLES) is required. Since there are no simple trigger criteria, a full event reconstruction is needed in FLES.
The FLES package has been initially developed in the CBMROOT simulation and reconstruction framework. A standalone version of the FLES package adds flexibility with respect to different modern and future many-core CPU/GPU architectures. That is important for further development, optimization and testing of the package on various CPU/GPU hardware. The package is parallelized both at the data (using the SIMD instruction set) and the task (using the Threading Building Blocks library) levels.
Extensive tests with simulated Au-Au collisions at 25 GeV have been performed. The reconstruction efficiencies for tracks and short-lived particles are presented and discussed. The FLES package shows a strong scalability on various many-core systems.
Supported by EU-FP7 HadronPhysics3, HIC for FAIR and HGS-HIRe for FAIR. Das Projekt wird vom Hessischen Ministerium fuer Wissenschaft und Kunst gefoerdert.