Cable-in-Conduit – reliable, cost-effective dipole technology for 1 Tesla to 20 Tesla

by Peter McIntyre (Texas A&M University)

Thursday 9 Feb 2017, 14:00 → 15:00 Europe/Zurich

112/R-028 (CERN)

Abstract: Cable-in-conduit has been used to advantage for superconducting windings for tokomaks, NMR spectrometers, and superconducting energy storage for many years. Beginning with the Nuclotron at Dubna and then the SIS100 ring at GSI, a cable-outside-conduit- has been used successfully for accelerator dipoles. We have developed a NbTi cable-in-conduit for use in collider magnets, and we are putting it into first service for the 3 T dipoles and quadrupoles for the Ion Ring of the proposed Jefferson Lab Electron-Ion Collider (JLEIC). Superconducting wires are twist-cabled around a perforated center tube, the cable is pulled into a sheath tube, and the sheath is drawn down to compress the wires against the center tube and immobilize. We have successfully fabricated prototype windings in which small-radius saddle-ends are formed on each turn. We have measured the conductor placement precision in the finished windings, and verified that the systematic and random multipoles in the magnetic field distribution that would be produced meets the dynamic aperture requirements for a hadron collider. Designs will be presented that include a dual dipole for a 500 TeV Collider-in-the Sea, and for ~16 T dipoles in which Nb3Sn and Bi-2212 wires are configured into a CIC.