IPAC'25 - the 16th International Particle Accelerator Conference

Damage potential and machine protection criticality of the FCC-ee beams

MOPM023

2 Jun 2025, 16:00

2h

Exhibiton Hall A _Magpie (TWTC)

Poster Presentation MC1.A02 Lepton Circular Colliders Monday Poster Session

Speaker

Dr Christoph Wiesner (European Organization for Nuclear Research)

Description

The lepton beams of the Future Circular Collider FCC-ee will store 17.5 MJ of energy per beam during Z mode operation. The damage potential of these beams is an essential input for the design of the machine protection system. In this paper, we first report the stored energy and energy density of the FCC-ee beams and compare them with the values for the Large Hadron Collider (LHC) and the High-Luminosity LHC (HL-LHC). We then present the results of energy deposition studies using FLUKA for the generic scenario of a direct beam impact on graphite. Due to the small beam sizes and the distinct shower development, the FCC-ee beams cause peak energy depositions that for Z mode intensities can be comparable to the LHC protons beams. In a last step, the initial hydrodynamic response of the material is simulated using ANSYS Autodyn for a round beam with a corresponding peak energy deposition. The calculated temperature rise, density depletion and pressure development are presented and discussed.