Speaker
Description
Helmholtz-Zentrum Berlin plans to construct a greenfield fourth-generation synchrotron light source in the early 2030th to replace BESSY II, a 1.7GeV machine running since 1998. The optimization of the linear lattice already considered non-linear aspects, such as minimizing the necessary sextupole strength and phase advance cancellation to reduce the resonant driving terms, RDTs, for the minimal case of two families of sextupoles. In preparation for the final optimization of sextupoles and octupoles, two different approaches are compared, using the maximum of eight individual sextupoles families and octupoles. On the one hand multi-objective genetic optimization, on a lattice with a given error set and corrections, using different objectives and constraints. On the other hand, the minimization of the first and second-order RDTs. Here, analytic formulas are used, so that after a single evaluation of the Twiss functions the RDTs can be determined for different non-linear fields. The results will determine the strategy for the optimization of the non-linear behavior of the lattice i.e. dynamic aperture and momentum acceptance, taking the efficiency of the optimization into account.
Funding Agency
Work supported by German Bundesministerium für Bildung und
Forschung, Land Berlin, and grants of Helmholtz Association
| Region represented | Europe |
|---|---|
| Paper preparation format | LaTeX |
