High-field superconducting magnets (12 T and greater) for fusion applications

Our ability to produce high magnetic fields in large volumes using superconducting windings has grown dramatically in recent years. The coils in the International Fusion Superconducting Magnet Test Facility at Oak Ridge National Lab. soon will have produced 8 T in a toroidal array of six D-shaped coils appropriate for a tokamak and ∼ 10 tonnes each. One of the nearly 400-tonne Yin-Yang pairs in Magnetic Fusion Test Facility-B at Lawrence Livermore National Lab. (LLNL) has already produced fields near 7.7 T, and soon the rest of the coils will be charged, with fields in the choke coils of this linear array exceeding 12 T