Multi-objective optimization of the dynamic aperture for the Swiss Light Source upgrade

摘要: The upgrade of the Swiss Light Source, called SLS 2.0, is scheduled for 2023-24. current storage ring will be replaced by one based on multi-bend achromats, allowing about 30 times higher brightness. Due to stronger focusing and required chromatic compensation, finding a reasonably large dynamic aperture (DA) injection, as well an energy acceptance sufficient beam lifetime, challenging. In order maximize DA prolong we combine well-known tracking code tracy with massively parallel implementation multi-objective genetic algorithm (MOGA), further extend this constraint-handling methods. We then optimize magnet configuration two lattices: lattice that used in commissioning phase (phase-1), afterwards, completion (phase-2). Finally, show analyze chosen configurations case phase-1 compare it pre-existing, manually optimized solution.