MAGNETIC ISLAND FORMATION IN A TOKAMAK PLASMA FROM HELICAL PERTURBATIONS OF THE PLASMA CURRENT

摘要

In this report we discuss the formation, structure, and some of the consequences of magnetic islands in a tokamak plasma. These may be produced from helical current perturbations in the plasma. The existence, structure, and magnitude of the current perturbations causing the island formation is deduced from experimental measurements of the time rate of change of the poloidal magnetic field in the ORMAK device.