Correlation of magnetic fluctuations and edge transport in the Doublet III tokamak

A clear correlation between incoherent magnetic fluctuations and transport in the outer region of the plasma was observed in a set of Doublet III beam-heated discharges which experienced repetitive transitions between a poor-confinement phase and an improved-confinement phase. The fluctuations and associated transport are consistent with a model based on an assembly of saturated microtearing modes.