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Abstract:
In the future Facility for Low-energy Antiproton and
Ion Research (FLAIR) at GSI, the Ultra-low energy
electrostatic Storage Ring (USR) will provide cooled
beams of antiprotons and possibly also highly charged
ions down to energies of 20 keV/A. A large variety of the
envisaged experiments demands a very flexible ring
lattice to provide a beam with variable cross section,
shape and time structure, ranging from ultra-short pulses
to coasting beams. The preliminary design of the USR
worked out in 2005 was not optimized in this respect and
had to be reconsidered.
In this contribution we present the final layout of the
USR with a focus on its “split-achromat” geometry, the
combined fast/slow extraction, and show the different
modes of operation required for electron cooling, internal
experiments, or beam extraction. We finally give a
summary of the machine parameters and the layout of the
optical elements.
