Section I. Atomic physics and related phenomena
The heavy ion storage and cooler ring project ESR at GSI

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Abstract

The Experimental Storage Ring ESR [1] is designed for accumulation, storage and cooling of heavy ion beams up to uranium with energies up to 500 MeV/u either directly out of the heavy ion synchrotron SIS [2] or via a stripper target, where electron-free or electron-poor ions are produced. The intense, cold beams may be used for a large variety of experiments, preferably in-ring experiments making use of the special features of the storage ring. Due to circulation frequencies of up to 2 MHz high luminosities will be attained using thin internal gas jet or electron target. Energies can be varied over a wide range from 500 MeV/u down to 3 MeV/u. The SIS/ESR-facility will also be capable of delivering beams of unstable nuclei produced by fragmentation or fission of heavy projectiles. After preselection in a large acceptance Z/A-separator the secondary beams can be prepared for internal or external experiments by stochastic precooling, intensity accumulation and final electron cooling.

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