Speaker
Description
The Compressed Baryonic Matter (CBM) is an under-construction heavy-ion physics experiment for exploring the QCD phase diagram at high $\mu_{B}$ which will use the new SIS-100 accelerator at the Facility for Anti-Proton and Ion Research (FAIR) in Darmstadt, Germany. The Silicon Tracking System (STS) is to be the main detector for tracking and momentum determination. A scaled-down prototype of various detector systems including mini STS (mSTS) is undergoing meticulous testing in the mini CBM (mCBM) experiment at the existing SIS-18 accelerator at GSI, Helmholtzzentrum f$\ddot{u}$r Schwerionenforschung in Darmstadt. This initiative seeks to comprehensively assess both hardware and software components, ensuring their efficacy in online capturing, processing and analyzing the intricate topological data generated by real events detected by the detector sub-systems.
In recent years, much effort has been put into a better and more accurate description of the detector geometries to better model the background. The direct conversion of Computer-Aided Design (CAD) based geometry model to Geometry Description Markup Language (GDML), XML-based format using different software toolkits has attracted considerable attention. The solids extracted from CAD models and represented in GDML format typically consist of triangular or quadrilateral facets. $\texttt{TGDMLParser}$ functionality in the ROOT and $\texttt{G4GDMLParser}$ in the GEANT facilitate the reading of different volumes from the GDML file and the creation of volume assemblies. However, this approach leads to an increase in simulation computation run-time.
We will present a comparative analysis of simulation studies with two distinct representations of the mSTS geometry: one employing simplified primitive ROOT/TGeo solids and the other utilizing Tessellated solid-based geometry, including secondary particle production, the significance of passive volumes, computation time; as well as a comparison of simulation data with real data measured with Ni-Ni collisions at 1.93 AGeV.
