Summary of Optics Issues

The first talk by A. Bogomyagkov analyzes the nonlinearities associated with a crab-waist optics, evaluated the effects on the dynamic aperture. It can explain the reduction of the dynamic aperture due to crab-waist sextupoles in many machines. Then he proposes a new layout for the location of the crab-sext to reduce those nonlinearities. This idea can help the issue on any machines, including SuperKEKB.