BNG produced a special cable for the prototype of a fast-ramped superconducting (yet iron dominated) accelerator magnet. The magnets are the key component of a superconducting synchrotron for highly charged heavy ions (SIS100 of FAIR-project at GSI in Darmstadt).

The operation of SIS100 demands very high ramping rates for the magnetic field of 4T/s. The occurring AC losses, also generated in the cable itself, have to be cooled effectively. To sustain the superconducting state of the cable, cooling has to be provided at very low temperatures (4.2K boiling point of liquid helium). Therefore a mixture of liquid and (cold) gaseous helium are pumped through the cable. A tubular core is used as the SIS100 cables’ cooling channel. The superconducting strands are wound to its outer surface and are fixed by an additional fine wire. In a last step the cable is wrapped with several layers of isolation tape.

Central unit of the facility is the AC 370 planetary strander for the fabrication of flat band cable. With this machine a part of the Rutherford-type cable for the Large Hadron Collider (LHC at CERN, Geneva) has been produced at Kabelwerke Brugg. BNG modified the machine to produce the SIS100 cable