FCC-hh
Generated by GPT-5-miniExpansion Funnel Raw 99 → Dedup 0 → NER 0 → Enqueued 0
| FCC-hh | |
|---|---|
| Name | Future Circular Collider (hadron–hadron) |
| Acronym | FCC-hh |
| Type | particle collider |
| Location | Geneva region |
| Proposed | 2019 |
| Status | proposed |
| Energy | 100 TeV (center-of-mass) |
| Circumference | ~100 km |
| Proponents | CERN, European Organization for Nuclear Research |
| Related | Large Hadron Collider, Future Circular Collider (FCC) |
FCC-hh The Future Circular Collider hadron–hadron project proposes a next-generation particle accelerator sited in the Geneva region to reach proton–proton collisions at about 100 TeV center-of-mass energy, building on experience from the Large Hadron Collider, the Large Electron–Positron Collider, and the Super Proton Synchrotron. The project is framed by studies from CERN, engagement with agencies such as the European Commission, partnerships with national laboratories including Fermilab, DESY, and KEK, and consultations with scientific collaborations that involve institutions like MIT, Stanford University, University of Oxford, and Sapienza University of Rome. The initiative is positioned amid strategic planning exercises like the European Strategy for Particle Physics and global roadmaps such as those by the International Committee for Future Accelerators.
Overview
The FCC-hh concept originates from the FCC study that followed roadmaps after the Higgs boson discovery and the operational record of the ATLAS experiment and CMS experiment. It is presented alongside companion projects including FCC-ee and FCC-eh as part of a staged programme influenced by previous proposals such as VLHC and contemporary alternatives like the CEPC in China. Scientific motivations are articulated in reports produced by panels involving members of IHEP (Beijing), TRIUMF, Brookhaven National Laboratory, and academic groups from Harvard University, University of Cambridge, and École Polytechnique. Policy discussions have involved stakeholders including the European Council, the G7, and funding agencies such as the National Science Foundation and Deutsche Forschungsgemeinschaft.
Design and Technical Specifications
The baseline design calls for a superconducting magnet lattice using high-field dipoles based on Nb3Sn conductor technology, aiming for fields in the 16–20 tesla range, drawing on magnet R&D at CERN Accelerator School, Fermi National Accelerator Laboratory, and CEA. The ring circumference is approximately 100 km, integrating civil engineering lessons from the Gotthard Base Tunnel and tunnelling projects like the Channel Tunnel and Gotthard Road Tunnel. Collider systems reference injector chains analogous to the Proton Synchrotron and Super Proton Synchrotron, with cryogenic infrastructure inspired by ITER refrigeration concepts and RF technologies developed at DESY and SLAC National Accelerator Laboratory. Detector concepts build on advances from ATLAS, CMS, ALICE, and LHCb, and envisage new trackers, calorimetry, and muon systems with sensor technologies originating from collaborations with CERN EP department, INFN, KEK, and industry partners such as Siemens and Thales.
Physics Goals and Discoveries
FCC-hh aims to extend searches for beyond-Standard-Model phenomena explored at facilities like Tevatron and LEP and pursue precision measurements of the Higgs boson, top quark, and electroweak sector beyond the capabilities of LHC Run 3 and planned High-Luminosity LHC upgrades. It targets direct production of potential heavy states predicted in theories studied by groups at Institute for Advanced Study, Perimeter Institute, and CERN Theory Department—including searches for supersymmetry, extra dimensions, and heavy resonances analogous to speculative particles discussed in models by Georgi–Glashow-type frameworks and by researchers at Princeton University and Caltech. Precision programmes seek to constrain parameters relevant to cosmological questions probed by Planck (spacecraft), WMAP, and dark-matter experiments such as XENONnT and LUX-ZEPLIN, and to test mechanisms tied to baryogenesis studies from groups at Lawrence Berkeley National Laboratory.
Site, Infrastructure, and Construction Plan
The envisaged tunnel would be located in the Geneva region, leveraging existing CERN sites near Meyrin and Saint-Genis-Pouilly, with integration of surface campuses and access shafts modeled on past civil works at CERN Meyrin site and tunnelling practice from projects like Alpine Tunnel. Construction planning references procurement frameworks used by European Space Agency projects and mass-manufacture strategies from industrial consortia including Siemens Energy and Areva for cryogenics and power infrastructure. Timelines proposed by study groups indicate phases for site investigation, environmental permitting similar to processes applied in the Alpine Convention context, and staged commissioning akin to the sequence employed for LHC commissioning and the LEP physics run.
Cost, Funding, and International Collaboration
Cost estimates presented in study reports have prompted comparison with major scientific investments such as James Webb Space Telescope, International Thermonuclear Experimental Reactor (ITER), and national flagship projects financed by entities like the European Investment Bank and national ministries (for example, entities equivalent to French Ministry of Higher Education and Research and German Federal Ministry of Education and Research). Funding scenarios envision multilateral cost-sharing across participants including European Union member states, the United States Department of Energy, and national research agencies such as CNRS, INFN, Russian Academy of Sciences, and Japan Society for the Promotion of Science. Governance proposals reference models from CERN Convention, international treaties such as Euratom Treaty precedents, and partnership structures resembling International Linear Collider arrangements.
Environmental and Safety Considerations
Environmental assessments refer to mitigation strategies used in large infrastructure projects like Gotthard Base Tunnel and Channel Tunnel, covering groundwater management, spoil handling, and habitat protection involving authorities such as Federal Office for the Environment (Switzerland). Radiation protection and personnel safety build on regulatory frameworks applied at CERN Radiation Protection and national bodies including Agence de sûreté nucléaire-style regulators and Office for Nuclear Regulation (UK) analogues. Emergency planning and industrial safety draw on standards from International Organization for Standardization certifications and lessons from past accelerator incidents recorded in operational histories of SLAC, Fermilab, and CERN.