Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 14: Instrumentation III
HK 14.1: Vortrag
Montag, 14. März 2016, 16:30–16:45, S1/01 A3
The detector response simulation for the CBM Silicon Tracking System as a tool for hit error estimation — •Hanna Malygina1,2,3, Friese Volker3, and Maksym Zyzak3 for the CBM collaboration — 1Goethe Universität Frankfurt — 2KINR, Kyiv, Ukraine — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt
The Compressed Baryonic Matter experiment(CBM) at FAIR is designed to explore the QCD phase diagram in the region of high net-baryon densities. As the central detector component, the Silicon Tracking System (STS) is based on double-sided micro-strip sensors. To achieve realistic modelling, the response of the silicon strip sensors should be precisely included in the digitizer which simulates a complete chain of physical processes caused by charged particles traversing the detector, from charge creation in silicon to a digital output signal.
The current implementation of the STS digitizer comprises non-uniform energy loss distributions (according to the Urban theory), thermal diffusion and charge redistribution over the read-out channels due to interstrip capacitances. Using the digitizer, one can test an influence of each physical processes on hit error separately. We have developed a new cluster position finding algorithm and a hit error estimation method for it. Estimated errors were verified by the width of pull distribution (expected to be about unity) and its shape.
Supported by HIC for FAIR and HGS-HIRe.