Construction and Testing of the Nb3Sn Coils for the High-Field Test Facility

The High Field Test Facility (HFTF), which consists of a set of superconducting coils and associated support equipment, has been constructed and successfully tested at the Lawrence Livermore National Laboratory (LLNL). The superconducting coils in this facility consist of an outer solenoid wound from Nb-Ti conductor and an insert solenoid with cryogenically stabilized multi-filamentary Nb3Sn conductor, cooled by pool-boiling liquid helium.