Design and Fabrication of a Single-Aperture 11 T ${rm Nb}_{3}{rm Sn}$ Dipole Model for LHC Upgrades

摘要

The planned upgrade of the LHC collimation system includes additional collimators to be installed in the dispersion suppressor areas of points 2, 3 and 7. To provide the necessary longitudinal space for the collimators, a replacement of 8.33 T Nb-Ti LHC main dipoles with 11 T dipoles based on ${rm Nb}_{3}{rm Sn}$ superconductor compatible with the LHC lattice and main systems is being considered. To demonstrate this possibility FNAL and CERN have started a joint program to develop a 2 m long single-aperture dipole magnet with the nominal field of 11 T at $sim$11.85 kA current and 60 mm bore. This paper describes the demonstrator magnet magnetic and mechanical designs and analysis, coil fabrication procedure. The ${rm Nb}_{3}{rm Sn}$ strand and cable parameters and test results are also reported.