maintenance and upgrades of the existing beam cooling systems (SIS electron cooling, ESR electron cooling, ESR stochastic cooling, CRYRING electron cooling). This includes the hardware, the controls concepts [...] for these systems. Setting up and commissioning the CRYRING electron cooler. Responsibility and realization of the CR stochastic cooling (s.c) 3.1. Planning (simulations, general concept, system design) [...] commissioning the complete s.c. system Support of the operating staff during beam manipulations with cooling. Machine development experiments and new methods involving cooling at the GSI/FAIR storage rings