WP6A is in charge of the development, design, engineering, construction and test of the cold powering systems that will transfer the current from the HL-LHC new galleries, where the power converters will be located, to the superconducting magnets in the LHC main tunnel. This includes high current (> |100| kA) power transmission lines (Superconducting Links) based on MgB2 superconducting technology, about 100 m and 140 m long; High Temperature Superconducting (HTS) current leads, based on REBa2Cu3O7-x superconductor; cryostat terminations, at each extremity of the Superconducting Link, for the routing and splicing of the superconducting cables in the tunnel (DF) and in the new galleries (DFH). The mandate includes also definition of operation and protection requirements, definition and implementation of cryogenic and electrical instrumentation required for operation and protection, development and performance of the electrical interconnections between the superconducting materials in the system, as well as development and validation of technologies for handling and installing the long Superconducting Links.
Integration and installation in the LHC underground areas are treated in an effective and close collaboration with WP15. The first full-scale prototype cold powering system will be tested at CERN in nominal operating conditions and then used for the powering of the magnets’ String.
WP6A develops novel superconducting technologies for efficient power transmission*. The Superconducting Links are the first MgB2 high-current (> |100| kA) power transmission lines ever made as well as the highest DC current superconducting transmission lines ever operated. The cold powering systems operate in helium gas, with MgB2 at up to 25 K and HTS up to 60 K. The systems were conceived and developed at CERN.