摘要 |
Disclosed herein is a toroidal field coil 64 for generating a toroidal magnetic field in a nuclear fusion reactor, preferably a compact fusion reactor such as a spherical tokamak, the reactor comprising a toroidal plasma chamber having a central column 61. The toroidal field coil comprises a plurality of windings passing through the central column and around the outside of the plasma chamber. Each winding includes a cable comprising a plurality of stacked HTS tapes, each HTS tape including one or more layers of a high temperature superconductor material. The HTS tapes are arranged such that a face of each HTS tape is perpendicular to a direction of maximal neutron flux during reactor operation as the cable passes through the centre column, such an orientation resulting in neutron interactions generally damaging small patches of multiple tapes rather than a large strip of a single tape. |