FCC (particle collider)

FCC (particle collider)
Name	Future Circular Collider
Caption	Conceptual layout
Location	Europe
Type	Circular collider
Status	Proposed
Owner	CERN
First beam	Planned
Energy	up to 100 TeV (proton–proton)
Circumference	~100 km

FCC (particle collider) The Future Circular Collider is a proposed high-energy accelerator concept intended to succeed the Large Hadron Collider as a flagship facility for high-energy physics. The project is coordinated by CERN and involves collaborations with institutions such as DESY, INFN, KEK, SLAC National Accelerator Laboratory, and national funding agencies like the European Commission. It aims to advance research areas connected to experiments at ATLAS (particle detector), CMS (detector), LHCb, and future detector concepts.

Overview and Objectives

The FCC initiative proposes a large circular facility to probe energy scales beyond the Large Hadron Collider by addressing unanswered questions tied to Standard Model (physics), Higgs boson, electroweak symmetry breaking, dark matter, and matter–antimatter asymmetry. Strategic goals align with recommendations from bodies such as the European Strategy for Particle Physics, the Particle Physics Project Prioritization Panel, and reports by the International Committee for Future Accelerators. The collaboration envisages synergy with programs at Fermilab, TRIUMF, Paul Scherrer Institute, and global neutrino efforts like DUNE and Hyper-Kamiokande.

Design and Technology

Design concepts include multiple accelerator rings—electron–positron (FCC-ee), proton–proton (FCC-hh), and electron–hadron (FCC-eh)—drawing on technology developed for the Large Hadron Collider upgrade, High-Luminosity Large Hadron Collider, and superconducting magnet R&D from projects at ITER and industrial partners such as Siemens and Hitachi. Key technologies involve high-field superconducting magnets using niobium–titanium and niobium–tin conductors, cryogenics honed at DESY, radio-frequency cavities similar to those in European XFEL, and injector chains that would interface with facilities like SPS (accelerator), PS (accelerator), and proposed linacs at CERN Linear Collider concepts. Detector designs reference lessons from ATLAS upgrade, CMS upgrade, LHCb upgrade, and concepts developed at ILC and CLIC study groups.

Site and Infrastructure

The proposed roughly 100-kilometre ring would be sited in the vicinity of the CERN campus near Geneva, crossing territory in Switzerland and France with civil engineering challenges akin to projects such as the Channel Tunnel and the Gotthard Base Tunnel. Infrastructure planning involves coordination with national authorities including Canton of Geneva, Haute-Savoie, and regional planning agencies, and anticipates tunnelling methods used by contractors experienced on works for Alpine tunnelling and utilities projects by companies like Bouygues and Vinci. Surface facilities would connect to laboratories such as CERN Meyrin site and data centres modeled on WLCG operations and computing centres at CERN IT and GridPP.

Physics Program and Scientific Goals

The FCC physics program includes precision measurements of the Higgs boson, studies of top quark properties, searches for supersymmetry, probes of composite Higgs scenarios, and direct searches for heavy states predicted in models like grand unified theory variants and extra dimensions. Collider modes (FCC-ee, FCC-hh, FCC-eh) would enable complementary investigations comparable to programs at LEP and prospective facilities such as ILC and CEPC. Experiments would connect to astrophysical observatories like Planck (spacecraft), Fermi Gamma-ray Space Telescope, and underground facilities such as SNOLAB and Gran Sasso Laboratory through dark matter and neutrino physics interfaces.

Project Timeline and Cost

Timeline estimates published by collaborations and advisory panels sketch conceptual design phases, technology demonstrators, and potential construction windows paralleling long-term roadmaps like the European Strategy for Particle Physics updates and national roadmaps from EPSRC and Agence Nationale de la Recherche. Funding scenarios reference multilateral contributions from agencies including European Commission, Deutsche Forschungsgemeinschaft, National Science Foundation, and national ministries. Cost studies compare to historical budgets for major projects such as the Large Hadron Collider construction and upgrades, and leverage procurement models used for ITER and large infrastructure programmes in Europe and Asia.

Environmental and Societal Impact

Environmental assessments consider interactions with regional ecosystems similar to evaluations for the Alpine Convention and large civil works like the Mont-Blanc tunnel projects, including groundwater management and land use permitting with French Ministry of Ecology and Swiss environmental authorities. Societal impacts include workforce development through partnerships with universities such as University of Geneva and EPFL, technology transfer pathways involving industry partners including Air Liquide and Thales, and outreach modeled on CERN education programmes and exhibitions at institutions like the Science Museum (London) and Musée de la Science et de la Technologie (Milan). International collaboration frameworks echo arrangements in treaties like those underpinning European Space Agency projects and multinational science consortia.

Category:Particle accelerators Category:Physics projects Category:CERN