CERN Accelerating science

Article
Title	A VecGeom navigator plugin for Geant4
Author(s)	Wenzel, Sandro (CERN) ; Apostolakis, John (CERN) ; Cosmo, Gabriele (CERN)
Publication	2020
Number of pages	8
In:	EPJ Web Conf. 245 (2020) 02024
In:	24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.02024
DOI	10.1051/epjconf/202024502024
Subject category	Computing and Computers
Abstract	VecGeom is a geometry modeller library with hit-detection features as needed by particle detector simulation at the LHC and beyond. It was incubated by a Geant-R&D; initiative and the motivation to combine the code of Geant4 and ROOT/TGeo into a single, better maintainable piece of software within the EU-AIDA program.So far, VecGeom is mainly used by LHC experiments as a geometry primitive library called from Geant4, where it was shown to provide 7–12% reduction in CPU time due to its faster algorithms for complex primitives [1].In this contribution, we discuss how VecGeom can be used as the navigating library in Geant4 in order to benefit from both its fast geometry primitives as well as its vectorised navigation module. We investigate whether this integration provides the speed improvements expected, in addition to the gain obtained from geometry primitives. We discuss and benchmark the application of a VecGeomnavigator plugin to Geant4 for a simplified geometry and show paths towards production usage.
Copyright/License	© 2020-2024 The Authors (License: CC-BY-4.0)

Corresponding record in: Inspire