Recent developments at the Gustaf Werner cyclotron and CELSIUS

The Gustaf Werner cyclotron, which usually operates in isochronous mode, is used as a synchrocyclotron for high energy protons. In addition to its internal PIG ion source, it has been equipped with two external ion sources, an ECR source for heavy ions and a source for polarized protons and deuterons. The CELSIUS ring is used for intermediate-energy physics with thin internal targets. A major concern is to keep the experimental background small. The electron cooling system is helping this task, but is not yet very useful at the injection energy. The reasons behind this are becoming clear. A long shutdown in the fall of 1993 will bring further enhancements to both accelerators