Abstract
Two new ReBCO-CORC® based cable-in-conduit conductors (CICC) are developed by CERN in collaboration with ACT-Boulder. Both conductors feature a critical current of about 80 kA at 4.5 K and 12 T. One conductor is designed for operation in large detector magnets, while the other is aimed for application in fusion type magnets. The conductors use a six-around-one cable geometry with six flexible ReBCO CORC® strands twisted around a central tube. The fusion CICC is designed to be cooled by the internal forced flow of either helium gas or supercritical helium to cope with high heat loads in superconducting magnets in large fusion experimental reactors. In addition, the cable is enclosed by a stainless steel jacket to accommodate with the high level of Lorentz forces present in such magnets. Detector type magnets require stable, high-current conductors. Therefore, the detector CORC® CICC comprises an OFHC copper jacket with external conduction cooling, which is advantageous due to its simplicity. A 2.8 m long sample of each conductor is manufactured and prepared for testing in the Sultan facility at PSI Villigen. In the paper, the conductor design and assembly steps for both CORC® CICCs are highlighted.
Highlights
Magnets for large scale particle detectors, magnets for fusion experiments, and their bus lines require high currents in high magnetic fields at a wide range of operating temperatures
The operating limits of NbTi and Nb3Sn conductors in terms of magnetic field, current density and temperature warrant the development of cables made from high temperature superconductors (HTS)
HTS materials such as ReBCO (Re = Rare Earth), BSCCO or MgB2 greatly broaden the operating spectrum of temperature, current and magnetic field ranges compared to cables using traditional Nb-based low temperature superconductors
Summary
Magnets for large scale particle detectors, magnets for fusion experiments, and their bus lines require high currents in high magnetic fields at a wide range of operating temperatures. The operating limits of NbTi and Nb3Sn conductors in terms of magnetic field, current density and temperature warrant the development of cables made from high temperature superconductors (HTS). HTS materials such as ReBCO (Re = Rare Earth), BSCCO or MgB2 greatly broaden the operating spectrum of temperature, current and magnetic field ranges compared to cables using traditional Nb-based low temperature superconductors. CERN is exploring several HTS options, including the use of MgB2 for superconducting links that power parts of the Large Hadron Collider [1], as well as ReBCO based conductors using either Roebel [2] or Conductor On Round Core (CORC) R cable variants [3]. The CORC R cable is a round conductor that offers isotropic flexibility in combination with high current densities, ranging from 100 to 600 A/mm at 4 K and 10 T, and high electrical.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
