Annual Meeting of the ErUM-FSP APPA 2026

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 have been added, though some challenges remain. In my talk, I lay out the present limits of cooler operation and performance regarding experiments with low- and highly charged ions. I also give and outlook onto plans to further push those limits in the future.