PROGRESS AND DEVELOPMENTS AT THE COOLER SYNCHROTRON COSY

The cooler synchrotron COSY delivers unpolarized and polarized protons in the momentum range 300 MeV/c up to 3.65 GeV/c. Electron cooling at injection level and stochastic cooling covering the range from 1.5 GeV/c up to maximum momentum are available to prepare high precision beams for internal as well as external experiments in hadron physics. The beam is fed to external experiments by a fast kicker extraction or by stochastic extraction. The beam development has been continued to increase the number of stored protons and also to deliver deuterons.