PROGRESS OF THE 2 MEV ELECTRON COOLER DEVELOPMENT FOR COSY- JÜLICH/ HESR

The 2 MeV electron cooling system for COSY-Julich was proposed to further boost the luminosity in presence of strong heating effects of high-density internal targets. The energy is chosen to cover the full energy range of COSY. The 2 MeV cooler is also well suited in the start up phase of the High Energy Storage Ring (HESR) at FAIR in Darmstadt. It can be used for beam cooling at injection energy and for testing new features of the high energy electron cooler for HESR. The design and construction of the cooler is accomplished in cooperation with the Budker Institute of Nuclear Physics in Novosibirsk, Russia. . The infrastructure necessary for the operation of the cooler in the COSY ring (radiation shielding, cabling, water cooling etc.) is established. The electron beam commissioning at BINP Novosibirsk started at May of 2011. First results are reported. Final commissioning at COSY-Julich is planned for the end of 2011.