A common coil magnet for testing high field superconductors

A one-meter long magnet has been fabricated to provide background field for testing racetrack shaped coils made from high field materials such as Nb/sub 3/Sn, Nb/sub 3/Al and the new high temperature superconductors, BSCCO and YBCO. The magnet is of the double aperture common coil type and uses high current Nb-Ti main coils to produce an applied field of approximately 7T on inner coils fabricated from pre-reacted tape conductors. The performance of the magnet is summarized along with test results from insert coils wound from N/sub 3/Sn ribbon conductor.