Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Computing I

HK 27.5: Vortrag

Mittwoch, 12. März 2025, 15:00–15:15, SR Exp1A Chemie

Simulation Comparison of the mSTS Geometry based on Primitive ROOT/TGeo Solids and Tessellated Solids — •Mehulkumar Shiroya for the CBM collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany

The Silicon Tracking System (STS) is the core tracking detector of CBM, tasked with achieving high-precision measurements of particle tracks and momentum. Currently, a prototype system, comprising several detector subsystems, including a scaled version of the STS called mSTS is undergoing extensive testing in the miniCBM (mCBM) experiment at the existing SIS-18 accelerator at GSI, Helmholtzzentrum für Schwerionenforschung, Darmstadt.

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. Solids extracted from CAD models and represented in GDML format typically consist of triangular or quadrilateral facets. TGDMLParser in ROOT and G4GDMLParser in GEANT facilitate the reading of different volumes from the GDML file and the creation of volume assemblies.

We will present a simulation analysis study of two representations of the mSTS geometry: one employing simplified primitive ROOT/TGeo solids and the other utilizing Tessellated solid-based geometry. The study includes secondary particle production, the significance of passive volumes, and computation time.

Keywords: Silicon Tracking System; CBM; CAD-to-ROOT; Tessellated Solids