Abstract

The future Facility for Antiproton and Ion Research (FAIR) at Darmstadt will produce the highest flux of antiprotons in the world. Within the planned complex of storage rings, it will also be feasible to decelerate the antiprotons to about 30 MeV kinetic energy, opening up the unique possibility to create low energy antiprotons and thus, establish low‐energy antiproton physics at GSI. In the Facility for Low‐energy Antiproton and Ion Research (FLAIR) the antiprotons shall be slowed down by means of two cooler storage rings. In the second one, the Ultra‐low energy electrostatic Storage Ring (USR), energies ranging from 300 keV to 20 keV will be available for various in‐ring experiments as well as for efficient injection of antiprotons into traps. In the limit of such small beam energies, the realization of efficient electron cooling, employing electron energies of only a few eV is one of the new challenges. In this contribution, a review of the FLAIR facility is given and its deceleration and cooling scheme is elucidated in comparison to the present AD operation scheme. Special emphasis is placed on the problems related to electron cooling at ultra‐low energies.

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