Abstract:
YBCO coated conductors are very promising for high field magnet applications because of their high current carrying capability, high irreversibility field and high mechanical strength. Accelerator magnets needs cables able to carry currents of about 10-20 kA in high-field. A technology for building such cables starting from round wires (NbTi, Nb3Sn or Bi2212) is well established. The technology for building cables composed of tapes, such as Bi2223 tapes and coated conductor tapes, is still in an early development stage. Some cable designs have been proposed, and one of them is the so-called transposed Roebel cable.
The seminar reports on the analysis and tests performed on Roebel cables in view of their possible application in accelerator magnets. Models of the electromechanical behaviours of coated conductors are introduced. Performances of Roebel cables at 4.2 K in fields of up to 9.6 T are reported and discussed.