A Lattice Design for the CLIC Damping Ring

A high-energy (0.5-5.0 TeV centre of mass) electronpositron Compact Linear Collider (CLIC) is being studied at CERN as a new physics facility [1]. The design study has been optimized for 3 TeV centre-of-mass energy. Intense bunches injected into the main linac must have unprecedentedly small emittances to achieve the design luminosity 10 35cm-2 s-1 required for the physics experiments. The positron and electron bunch trains will be provided by the CLIC injection complex. similar to the final positron damping ring will be sufficient. In the report, the main positron DR optics producing such low-emittance beam is described.