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CERN Feasibility Report Snapshot • March 2025/2026

The Next Era of High-Energy Physics: The FCC Roadmap

Investigating the successor to the Large Hadron Collider (LHC). A 91 km ring delivering unprecedented center-of-mass collision energies up to $100\text{ TeV}$ to unveil Higgs factory precision and probe dark matter domain frontiers.

Stage 1 Cost Estimate 15 Billion CHF
Tunnel Perimeter 91 km
Expert Contributors > 1,000 Scientists
Ring Scale Interactive Model LHC (27 km) vs FCC (91 km)

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STAGE 1
2030s – 2040s Target

FCC-ee: Electron–Positron Factory

A precision lepton collider serving as a Higgs, electroweak, and top-quark factory. Operating at center-of-mass collision energies across $Z$, $W$, $Higgs$ ($240\text{ GeV}$), and $t\bar{t}$ threshold ($365\text{ GeV}$).

  • Ultra-high luminosity per collision point
  • Civil & technical infrastructure shared for Stage 2
  • Total Construction Budget: ~15 Billion Swiss Francs
STAGE 2
Mid-Century Target

FCC-hh: Proton–Proton Hadron Collider

A massive hadron collider operating in the same 91 km tunnel, utilizing advanced superconducting magnets (16–20 Tesla) to reach an unprecedented collision energy of roughly $100\text{ TeV}$.

  • Direct discovery reach for heavy dark particles up to tens of TeV
  • High luminosity proton-proton and heavy ion operational modes
  • Synergy with heavy-ion physics (Lead & Oxygen/Neon ion runs)

FCC Stage 1 Capital Allocation Breakdown

Distribution of the 15 Billion CHF construction investment across infrastructure components

Feasibility Vol. 3 Dataset
Civil Engineering & Tunnelling (~50%) 7.5 Billion CHF

91 km subterranean tunnel under Lake Geneva, 8 shaft sites, caverns, and environmental surface platforms.

Technical Infrastructure & RF Cavities (~35%) 5.25 Billion CHF

Cryogenics, high-efficiency RF acceleration cavities, power distribution, vacuum systems, and safety setups.

Detectors & Experimental Areas (~15%) 2.25 Billion CHF

4 interaction points equipped with ultra-precise tracking, calorimetry, and high-rate readout electronics.