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Design and Planning of the FAIR Storage Rings

The concept of the storage rings in the FAIR project has made further progress. Details of the ion optical lattice for the Collector Ring (CR), the accumulator ring (RESR) and the New Experimental Storage Ring (NESR) have been investigated, resulting in a sound layout. This advanced layout is based on a maximum magnetic bending power for all three rings of 13 Tm which will be implemented by the use of normal conducting magnets. The basic ring size and structure of all rings is fixed, higher order corrections as well as a scheme for the correction of orbit errors have been worked out for all rings. After fixing the main ring dimensions the size of the ring tunnels and the area for all technical systems have been defined. The interior space of the rings, CR/RESR and NESR, will be filled with two-story buildings. The upper floor of these buildings will mainly accommodate the power converters, while the the lower floor will house most other technical systems, such as rf systems, beam diagnostics, injection and extraction supplies, and beam cooling systems. As a typical example Fig. 1 shows the ring tunnel and the lower floor of the CR/RESR building.