Speaker
Description
Helmholtz-Zentrum Berlin plans to construct a fourth-
generation greenfield synchrotron light source in the early
2030s to replace BESSY II, a 1.7 GeV machine that has been
running since 1998. The optimization of the linear lattice
already considers non-linear aspects, such as minimizing
the necessary sextupole strength and, for the minimal case
of two families of sextupoles, phase cancellation to reduce the resonant driving terms. In preparation for the final optimization of 8 sextupole families and the single octupole, different approaches are compared: multi-objective genetic optimization, for a lattice with given error sets and orbit
correction on the one hand, and the minimization of the
resonant driving terms and the detuning terms on the other
hand. Here, analytic formulas are used, so after a single
evaluation of the Twiss parameters, the driving terms can
be determined for different combinations of sextupole and
octupole values. The results will determine the strategy for
optimizing the lattice’s non-linear behavior, 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 |
