Speaker
Description
Linear e⁺e- colliders can provide a broad physics programme spanning centre-of-mass energies from the Z pole to the TeV scale, enabling precision measurements of the Higgs boson, top quark, and the electroweak sector with polarised beams. Two mature accelerator technologies are under development for a possible linear collider facility (LCF) at CERN beyond the HL-LHC: the superconducting RF (SCRF) approach embodied by the ILC as developed for hosting in Japan, and the proposed normal-conducting high gradient RF (NCRF) two-beam scheme of CLIC. Both options are described in detailed documents contributed to the European Strategy for Particle Physics Update (ESPPU) process. Beyond an initial implementation in the 250-380 GeV range, upgrades in energy and/or luminosity enabled by R&D on cool copper structures, higher gradient SCRF, energy recovery and plasma wakefield options can be considered. This paper summarises the status of the studies and associated technology developments, potential long-term upgrade paths, and key implementation parameters including cost, power, and sustainability assessments.
| Paper status | Proceeding files received |
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