FAIR Cryogenics — New Tasks on the Cryogenic System for the New Research Facility at GSI

The Gesellschaft fuer Schwerionenforschung (GSI), Darmstadt, will design and operate FAIR within a few years. The requirements for this new machine, given by the plans for advanced physics research, have been balanced with an economical project plan. The distribution system to supply widely spread users, which will require various helium‐flow schemes and cause high dynamic loads, will be the main cryosystem challenge for the new facility. The cryogenic infrastructure will be completed in two steps. In the first step a 4‐kW refrigerator will be needed. The second step will add a 15‐kW refrigerator. For both steps approximately one third of the refrigeration power is dynamic.