Efficient representation and symplectic integration of magnetic fields on curved reference frames for improved synchrotron design

by Silke Van Der Schueren (CERN - La Sapienza)

Friday 29 May 2026, 16:00 → 17:00 Europe/Zurich

6/2-024 - BE Auditorium Meyrin (CERN)

Abstract: 

Compact synchrotrons, such as the HeLICS ring proposed by the NIMMS collaboration for cancer therapy and research, use short and strongly curved dipoles. In some cases, these dipoles are designed as combined-function magnets or magnets with dominant edge angles to provide additional focusing and make the machine more compact. These magnets can introduce non-linear effects and may limit the dynamic aperture. In this seminar, I will present a framework that links field specifications to beam dynamics requirements that can be used to optimize the performance of the synchrotron and provide design expectations. This can be done by tracking simulations, using a tracking code bpmeth to track through more realistic fields in Xsuite, as well as the derivation of resonance driving terms to estimate the long-term stability.