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FCC Collimation

The Future Circular Collider (FCC) study includes two accelerators, a high-energy lepton collider (FCC-ee) and an energy-frontier hadron collider (FCC-hh). Both machines share the same tunnel infrastructure. The NDC section hosts the coordination of the FCC-hh design studies. FCC-hh design meetings.

The FCC integrated programme offers the most powerful post-LHC experimental infrastructure proposed to address key open questions in particle physics. It envisions an initial electron–positron collider phase, FCC-ee, which will be followed later by a proton–proton collider, both of which will be installed in the same 91 km circumference tunnel at CERN. Although the focus of the present phase of the FCC feasibility study is on the electron-positron collider, FCC-ee, full compatibility with the future hadron collider, FCC-hh, has been ensured. Throughout the design, synergies between FCC-ee and FCC-hh have been sought for maximum performance at minimum total cost.

FCC-hh considers two values for the main dipole field, namely 14T (to be realised with Nb3Sn magnets) and 20T (to be realised with high-temperature superconductor), which correspond to the centre-of-mass energies of 85TeV and 120.8TeV, respectively.

Current work for FCC-hh done in the section is the definition of the baseline design.A feasibility study including the design of the experimental insertions and technical insertions where different systems are located (Injection of each of the clockwise and anti-clockwise circulating beams, RF cavities, betatron collimation, momentum collimation and beam dump) is being conducted. We also adapt the global layout of the ring, following the results of placement studies for the tunnel and optimise the dipole filling factor to increase the centre of mass energy for experiments and maximise its scientific potential.

Overlay of the FCC accelerator with locations of technical and experimental areas
Fig. 1: Overlay of the FCC accelerator with locations of technical and experimental areas.

Relevant references

G. Perez-Segurana et. al, Study of the corrector systems for the new lattice of the CERN hadron-hadron Future Circular Collider. IPAC'24, Nashville, USA, 19-24 May 2024.

G. Perez-Segurana et. al, A new baseline layout for the FCC-hh ring. IPAC'24, Nashville, USA, 19-24 May 2024.

A. Abramov et. al, Collimation system for the updated FCC-hh design baseline. IPAC'23, Venice, Italy, 07-12 May, 2023.

M. Giovannozzi et. al, Recent updates of the layout of the lattice of the CERN hadron-hadron Future Circular Collider. IPAC'23, Venice, Italy, 07-12 May, 2023.