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May 8 – 12, 2023
Norfolk Waterside Marriott
US/Eastern timezone

Geant4 electromagnetic physics for Run3 and Phase2 LHC

May 11, 2023, 11:30 AM
Hampton Roads Ballroom VI (Norfolk Waterside Marriott)

Hampton Roads Ballroom VI

Norfolk Waterside Marriott

235 East Main Street Norfolk, VA 23510
Oral Track 3 - Offline Computing Track 3 - Offline Computing


Dr Sawkey, Daren (Varian Medical Systems)


For the new Geant4 series 11.X electromagnetic (EM) physics sub-libraries were revised and reorganized in view of requirements for simulation of Phase-2 LHC experiments. EM physics simulation software takes a significant part of CPU during massive production of Monte Carlo events for LHC experiments. We present recent evolution of Geant4 EM sub-libraries for simulation of gamma, electron, and positron transport. Updates of other components of EM physics are also discussed. These developments are included into the new Geant4 version 11.1 (December 2022). The most important modifications concern reorganization of initialization of EM physics and introduction of alternative tracking software. These modifications affect CPU efficiency of any simulation, CPU saving depends on geometry and physics configuration for concrete experimental setup. We will discuss several methods: gamma general process, Woodcock tracking, transportation with multiple scattering process, alternative tracking manager, and new G4HepEm library. These developments provide a ground for implementation of EM particle transport at co-processors and GPU. We also will present very recent updates in physics processes and in configuration of EM physics.

Consider for long presentation No

Primary authors

Ivantchenko, Vladimir (CERN & Princeton University) Mr Hahnfeld, Jonas (CERN) Dr Novak, Mihaly (CERN) Dr Pandola, Luciano (INFN, Italy) Dr Sawkey, Daren (Varian Medical Systems)

Presentation materials

Peer reviewing