Köln 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HK: Fachverband Physik der Hadronen und Kerne

HK 27: Computing I

HK 27.3: Talk

Wednesday, March 12, 2025, 14:30–14:45, SR Exp1A Chemie

TGeoArbN based tessellation in CBM geometry description^* — •Simon Neuhaus — Bergische Universität Wuppertal, Wuppertal, Deutschland

Tessellation is a method to describe an arbitrarily shaped volume using a triangle-based surface mesh. This offers promising possibilities to efficiently create ROOT/GEANT detector geometries for simulations directly from CAD output (e.g. STEP files). It facilitates faster iteration cycles in detector design and reduces the risk of potential discrepancies in the generated simulation geometry. However, a notable disadvantage of using tessellated objects for simulation is an increase in simulation time.

TGeoArbN is a software tool that enables the use of tessellated geometries in GEANT3- and GEANT4-based simulations. By employing its own navigation functionality, TGeoArbN operates completely independent of the ROOT-native TGeoTesselation library. Additionally, it features an inbuilt octree-based partitioning method for runtime optimization. Developed at the University of Bonn for the PANDA experiment this tool is now also utilized for simulations within the CBM experiment. This contribution will present the appplication of TGeoArbN and octree-based partitioning for certain components of the CBM experiment.

^*Work supported by "Netzwerke 2021", an initiative of the Ministry of Culture and Science of the State of Northrhine Westphalia, and BMBF 05P24PX1.

Keywords: Geometry; Tessellation; TGeoArbN; Octree based partioning; NRW FAIR