Design of a Final Focus System for CLIC in the Multi-bunch Regime

We present a design for the CLIC final focus system which authorizes the stable multi-bunch operation with a 5 mrad crossing-angle. The loss of luminosity is limited to less than 20% in such a way that crab-crossing cavities may not be required. The main feature of the design is that the vertically focusing final quadrupole is split into a 48 mm large bore superconducting quadrupole and a 13.7 mm bore normal conducting one. In that way, the off-axis outgoing beam is deflected by the first quadrupole into the field-free region of the second one.