Improved performance of the GSI heavy ion accelerator complex with cooled synchrotron beams

Electron cooling at the injection energy of the heavy ion synchrotron SIS results in beam pulses of higher intensity and exceptional quality. The beam parameters after cooling have been measured and verify a reduction of the phase space volume by more than three orders of magnitude. Beam transfer of the cooled ion beam is much easier because of the reduced emittance. The time required to fill the storage ring ESR with highly charged ions has been reduced from minutes to seconds.