ENGINEERING STATUS OF SIS100

The heavy ion synchrotron SIS100 is the central part of the new modularized FAIR start version. The 1083 m long lattice of SIS100 is built up of superferric magnets similar to the magnets developed for the NUCLOTRON synchrotron at JINR, Dubna [1]. Through the last years, an R&D program has been successfully performed with a focus on the optimization of the superferric magnets. Aiming for a significantly reduced AC loss, a number of model magnets and prototypes were built and tested. After reaching the main goals of the magnet R&D and the demonstration of the fundamental understanding of the dynamic behaviour of this type of magnets, the procurement of a first pre-series dipole magnet is now under preparation. The first pre-series dipole will be tendered together with the final dipole cryostat, the bus bar system designed for integration into the SIS100, the connecting cryostats and two types of thin wall, reinforced, cooled vacuum chambers. For the preparation of these specifications, the dipole cryostat environment had to be reviewed and optimized. The cryomagnetic system is one of the most complex technical systems of SIS100. Starting from the design of the main magnets and correctors, the integration of the cryomagnetic systems is being continued as a major activity in 2010. Open integration issues related to the design of other major components and systems, e.g. the injection and extraction devices are under investigation. The integration studies and design considerations are performed with the goal to reach the final device specifications for procurement of all components within one year.