3.1. FCCee: Full Simulation of CLD, the CLID detector for FCC

An adaptation of the CLIC detector for FCC-ee has been implemented and made available for tests at the times of the CDR (see, for example, N. Bacchetta et al., CLD – A Detector Concept for the FCC-ee) The DD4hep description, initially implemented under iLCSoft/lcgeo, is now availble under FCCDetectors which serves as reference.

While it is possible to simulate the detector through k4SimGeant4 for the Geant4-based full simulation and produce a EDM4hep output, to use the iLCSoft reconstruction tools it is still required to go through the SLCIO file format. The easiest way to do that is to use DDSim for the full simulation. In this chapter we illustrate how to run this workflow.

3.1.1. Setting up the environment

The solution described in this chapter is still in preview mode. Therefore we need the latest version of the software

source /cvmfs/sw-nightlies.hsf.org/key4hep/setup.sh

3.1.2. Generate some signal to process: taus from the particle gun

To illustrate this workflow we use a simple but significat example: single taus generated with the particle gun. We generate this with k4run and we save the result in stdHEP format for later processing in DDSim.