Tracking studies for the FCC-ee collimation system design

The Future Circular electron-positron Collider (FCC-ee) is being designed for stored beam energies up to 17.8 MJ, a value almost two orders of magnitude higher than any previous lepton collider. In this new regime, collimators are needed not only to control experimental backgrounds, but also to protect the machine from magnet quenches, or even damage. A beam-halo collimation system is therefore under study to protect the most sensitive equipment from unavoidable losses. Tracking simulations are key studies to evaluate the performance of the collimation system and are essential in an iterative process to converge to an optimum performance. In this paper, we present the results of collimation performance studies by means of power load distributions around the collider ring and propose possible optimizations of the halo collimation system.