Abstract
Software for the next generation of experiments at the Future Circular Collider (FCC), should by design efficiently exploit the available computing resources and therefore support of parallel execution is a particular requirement. The simulation package of the FCC Common Software Framework (FCCSW) makes use of the Gaudi parallel data processing framework and external packages commonly used in HEP simulation, including the Geant4 simulation toolkit and the DD4HEP geometry toolkit. Using Geant4 for full simulation implies taking into account all physics processes for transporting the particles through detector material and this is highly CPU-intensive. At the early stage of detector design and for some physics studies such accuracy is not needed, making a fast parametrised simulation better suited. Geant4 provides the tools to define a parametrisation, where the overall response of the detector is simulated in a parametric way. Many experiments create their own frameworks for these fast simulation studies. The implementation for the FCC allows an interplay between the two types of simulation within Geant4. Based on the type of the particle or a region within the detector, either full or fast simulation may be performed, running the time-consuming detailed simulation only for the regions and particles of interest.
Highlights
The Future Circular Collider (FCC) study has been launched to design the generation of accelerators, hosted at the European Organisation for Nuclear Research (CERN)
The comparison of the LHC and FCC accelerators parameters [1] shows how vital it is for the software designed for the coming experiments to rise to the even bigger challenges of future needs
Geant4 is a well-known toolkit used in various fields of physics
Summary
The Future Circular Collider (FCC) study has been launched to design the generation of accelerators, hosted at the European Organisation for Nuclear Research (CERN). Three configurations of the collider are considered: lepton (FCC-ee), hadron (FCC-hh) and hadron– lepton (FCC-he). The hadron collider defines the tunnel infrastructure, with the circumference of about 100 km for the proton–proton collisions at the centre-of-mass energy of 100 TeV. The demands on the computer resources and their efficient exploitation by experiment software increase with every upgrade of the Large Hadron Collider. The comparison of the LHC and FCC accelerators parameters [1] shows how vital it is for the software designed for the coming experiments to rise to the even bigger challenges of future needs. Detector design studies, which have already started, require the simulation package as the first component in the FCC Common Software Framework (FCCSW)
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