FCCee Beam Dynamics

The project develops a modular, extendable software framework for FCC-ee design and simulation work. Its first phase adds a multi-turn, multiple-interaction-point model of the collider, including a full lattice description, beam-beam modules, beamstrahlung, radiative Bhabha scattering and strong damping, for studies of beam lifetime and particle losses. Lattice and collective effects are modelled self-consistently. The work studies the luminosity reach and background tolerances with cross-talk between the interaction points, together with possible mitigation techniques, and examines the intensity limitations set by beam stability. It delivers a self-consistent simulation tool for designing high-energy lepton colliders, together with an operational scenario for the FCC-ee option.