Status of the ECR ion source at the Uppsala cyclotron

The room‐temperature ECR ion source at The Svedberg Laboratory, Uppsala, is being used as injector for the Gustaf Werner cylcotron as well as for atomic‐physics experiments. In November 1990 the first heavy‐ion beams from the ECR ion source were accelerated in the cyclotron. Nuclear‐physics experiments have now taken data using beams of He2+, O5+, and N6+. The transmission through the cyclotron is typically 5%. The present energy record is 450 MeV N6+. The energy of the heavy‐ion beams will be increased further by acceleration in the CELSIUS storage ring. Examples of atomic‐physics experiments in preparation are emission spectroscopy of highly ionized atoms, in particular, to study the transitions between Rydberg states, and studies of electron transfer processes in collisions of slow multicharged ions with atoms. The studies of yrast transitions are of interest in the field of x‐ray lasers and one motivation for the electron transfer studies is the importance of these phenomena in astrophysics and fusion...