Duke storage ring FEL program

摘要

Abstract: The Duke storage ring driven FEL scientific program is reviewed. The lattice design for Duke storage ring is described. The previous design of Duke storage ring is similar to the design of 1.2 GeV damping ring for the Standard Linear Collider and had the same problem with cross- over saturation of the arc magnets. SLAC solved the problem by removing the dimples and noses that created fixed sextupole moments and installing permanent magnet sextupoles. However, this method is very inconvenient for the storage rings with energy ramping where variable sextupoles are required. A new design for the Duke storage ring using existing hardware has allowed us to solve these problems.!0