A Novel Final Focus Design for Future Linear Colliders

The length, complexity and cost of present Final Focus designs for linear colliders grow very fast with the beam energy. Because of the tight tolerances and delicate tuning required there are serious questions as to whether they could ever reach design performance. In the following paper, a novel final focus system is presented and compared with the one proposed for NLC \cite{ZDR}. This new design is much simpler, shorter and cheaper, with wider bandwidth, and comparable tolerances and tunability. Moreover, the scaling of the length with energy is slower than linear allowing a more flexible design that is applicable over a much larger energy range. A N o v e l F i n a l F o c u s D e s i g n f o r F u t u r e L i n e a r C o l l i d e r s Pantaleo Raimondi and Andrei Seryi Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 USA