München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Instrumentation X and Applications

HK 45.4: Vortrag

Mittwoch, 20. März 2019, 17:30–17:45, HS 12

TGeoArbN: A ROOT class for tessellated geometries — •Ben William Salisbury for the PANDA collaboration — Helmholtz-Institut für Strahlen- und Kernphysik, Bonn

Simulations of particle physics experiments require a simulatable geometry representation of the experiment’s detector system, such as the forward endcap of the PANDA experiment. A new geometry object called TGeoArbN was implemented which uses a tessellated approximation of a CAD-shape. It is intended to be used as addition to the ROOT framework, allowing to simulate any geometry without the overhead of having to combine ROOT-geometry primitives to form an approximation of a complex shape. The tessellated approximation is stored as a mesh consisting of simple planar geometries, such as triangles. This mesh is then processed during the simulation to determine the relative location of a point (particle position) to the approximated geometry. An optimization scheme in form of a partition structure (Octree) was implemented to reduce processing time by determining the relevant mesh part for a specific point. In this talk a short overview of the concepts used by TGeoArbN and processing time determinations are presented.

Funded by the BMBF.