Polarized positron production and tracking at the ILC positron source

The positron source planned for the future international linear collider (ILC) is based on a helical undulator system. Depending on the accelerator design it will be possible to get polarized positrons at the interaction point. A source performance with high positron yield and high polarization is the aim of our design studies. We focus on the optimization of target and capture section by combining the advantages of the simulation codes FLUKA, Geant4 and ASTRA.