Annual Meeting of the ErUM-FSP APPA 2026

During the user run 2025 essentially all operation modes of the ESR were used and highlights will be presented: electron cooling, stochastic cooling, stacking, internal experiments and extracted beam experiments with beam delivery to CryRing and HITRAP. The new LSA control system is consolidated in the sense that it offers practically all operation modes covered by the decommissioned legacy...

Electron cooling is the only means of ion-beam cooling available at CRYRING@ESR. For precision experiments on stored ions, the range of available beam parameters is thus confined by technical and physical limits of the electron cooler in addition to those of the ring itself. Since recommissioning of the cooler at GSI/FAIR, its availability has steadily improved and new technical capabilities...

The HITRAP (Highly charged Ion TRAP) facility located at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt provides the unique ability to decelerate heavy, accelerator-produced highly charged ions (HCI) down to 6 keV/nucleon and cool to eV equivalent temperature. A two-stage decelerator consisting of an interdigital H-type decelerator as well as a radio frequency quadrupole reduce...

The accuracy of optical clocks is unprecedented and the study of highly charged heavy ions in these instruments promises an exceptional robustness against external perturbations in combination with an exceptional sensitivity to fundamental, nuclear, and beyond-Standard-Model physics. To pursue this goal, we are setting up a unique spectroscopy platform at the HITRAP ion trapping facility and...