Assessment of Eddy Current Effects on Compression Experiments in the Tokamak Fusion Test Reactor

The eddy current induced on the Tokamak Fusion Test Reactor vacuum vessel during compression experiments is estimated based on a cylindrical model. It produces an error magnetic field that generates magnetic islands at the rational magnetic surfaces. The widths of these islands are calculated and found to have some effect on electron energy confinement. However, resistive magnetohydrodynamic simulation results indicate that the island formation process can be slowed by plasma rotation.