Storing and electron cooling of polarized ions

Storing and synchrotron acceleration of medium energy polarized ions like protons is reviewed. For short storage times of the order of seconds to minutes the present experience from high energy proton synchrotrons indicates that little depolarization has to be expected. No experiments have been done so far to study depolarization rates for storage times of several hours as well as for simultaneous strong heating and cooling of the beam. Finally it is shown that hyperfine interaction between circulating ions and cooler electrons does not cause depolarization. (orig.)