Chapter 6A: Cold powering of the superconducting circuits

For the HL-LHC project, a novel concept for the cold powering of superconducting magnets has been developed. It is based on a new type of superconducting lines (hereafter referred to as Superconducting (SC) Links) that have been developed to transfer the current to the new HL-LHC insertion region magnets from remote distances. Power converters and current leads will in fact be located in the new underground areas (UR) excavated for the HL-LHC (technical galleries running aside the LHC tunnel), and the SC Links will provide the electrical connection between the current leads and the magnets – the latter being located in the LHC main tunnel. Each SC Link has a length of more than 100 m and transfers a total current of up to about |120| kA.