/acts-fatras

Primary LanguageC++

Fast track simulation extension for the Acts project

This project provides the code to run a fast track simulation on top of ActsCore. The fast track simulation (Fatras) uses the actor plug-in mechanism of the Acts::Propagator and its predictive navigation through the Acts::TrackingGeometry to simulate particle trajectories through the tracking detector.

As a fast track simulation, it uses the reconstruction geometry description, i.e. the Acts::TrackingGeometry as a simulation geometry with simplified and particle parameterised material effects:

  • Multiple coulomb scattering is done by gaussian (mixture) approximations
  • Ionisation loss is calculated using the Bethe-Bloch formalism
  • Radiation loss follows Bethe-Heitler formalism
  • Limited nuclear interaction processes are parameterised from Geant4

Dependencies for the Core components are:

  • ActsCore and consequently Eigen and Boost

Optional dependency exists for:

  • Geant4 for optional functionality taken from the full simulation toolkit