Speaker
Description
In order to develop superconducting wires meeting the requirements for the 16 T dipole magnets proposed for FCC-hh, CERN is coordinating a conductor development programme, now involving 6 manufacturers and 6 academic partners.
A key goal of the programme is to develop Nb$_3$Sn wires with a non-copper critical current density ($J_c$) of 1500 A mm$^{-2}$ at 16 T and 4.2 K, and to demonstrate their suitability for long-length manufacturing and cabling.
In this presentation, the progress with this development will be reported, with a particular focus on superconducting characterisation and quantitative microscopy performed at CERN of recently developed Nb$_3$Sn wires with novel layouts. Initial evidence of the suitability of these designs for the production of Rutherford cables will be presented based on rolling studies and cabling trials.
Finally, at a stage of the programme at which the interim target of a $J_c$ comparable with the HL-LHC wire specification has been achieved, the next steps for the development will be briefly summarised.
