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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Computing I

HK 27.4: Vortrag

Mittwoch, 12. März 2025, 14:45–15:00, SR Exp1A Chemie

TGeoArbN in combination with T.Stockmanns STEP-to-ROOT converter — •Ben Salisbury for the PANDA collaboration — Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Germany

In particle physics precise simulations are vital. For this accurate detector geometries are required. Simulateable triangle-meshes can be of great help to increase the automation of converting Computer-Aided-Design (CAD) detector models to simulatable geometries. However, the ROOT geometry package lacks the implementation of such a triangle-mesh. To address this capability gap in the ROOT framework, TGeoArbN, a ROOT compatible geometry class, was implemented allowing the use of triangle meshes (analog to G4TessellatedSolid) in Virtual Monte Carlo (VMC)-based simulation. To improve simulation speed partitioning structures in form of an Octree or bounding volume hierarchy can be used. TGeoArbN in combination with a STEP-to-ROOT converter (based on [1]) allowed for a high level of automation for the conversion of the FwEndcap geometry of the PANDA electromagnetic calorimeter. A short overview over TGeoArbN and a modified STEP-to-ROOT converter version will be given.

[1] T. Stockmanns, "STEP-to-ROOT -from CAD to Monte Carlo Simulation", Journal of Physics: Conference Series 396 (2012) 022050, url: https://doi.org/10.1088/1742-6596/396/2/022050

Keywords: ROOT; Simulation; Geometry; CAD