Title: FCC SC-RF systems and opportunities
Author: Erk Jensen
Institution: CERN
Abstract: Europe needs to be in a position to propose an ambitious post-LHC accelerator project at CERN by the time of the next Strategy update, when physics results from the LHC running at nominal energy will be available. CERN has started design studies for accelerator projects in a global context, with emphasis on proton-proton and electron-positron high-energy frontier machines. Complementary to Linear Colliders, the FCC (Future Circular Collider) study looks at ring-based colliders, both for hadrons and leptons. With a circumference of 80 to 100 km and dipole fields of about 15 T, this would allow an c.m. energy reach of 100 TeV for the proton machine. A lepton machine, dedicated to precision measurements, could be an intermediate step, another option is a hadron-electron machine. The FCC design study concentrates on related R&D challenges, both for high field magnets and for superconducting RF. The lepton collider is dominated by SR losses, so its SRF system cope with 100 MW cw; R&D will concentrate on a system scalable to this size. The study should conclude in time for the next update of the European Strategy for Particle Physics foreseen to take place in 2018
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