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Description
The FCC collider requires very high beam quality from the injector for both bootstrap and top-up operations. Given the amount of charge required and the need for an intermediate acceleration stage in the booster ring, alternate trains of particles with opposite charge must be provided by the Injector Complex. During the Feasibility Study, different options and energies were considered before reaching the current design stage. The injector currently includes separate LINACs for electrons and positrons up to an energy of 2.86 GeV. Both species are injected into the Damping Ring to reduce emittance and energy spread before being accelerated to 20 GeV with a dedicated LINAC. The Damping Ring is required to produce beams with the proper emittance within a damping time that ensures the most efficient injection into the Main Rings.
In this contribution, the main aspects of the new high-energy Damping Ring for electrons and positrons are reviewed, and a full report on the design status is presented.
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