Effect of Resonant Magnetic Perturbations on Fluctuations and Transport on DIII-D

Resonant magnetic perturbations (RMPs) have been shown to suppress ELM activity during H-mode and so is a very attractive (but not well understood) technology for ITER and future burning plasmas. In a series of experiments conducted on DIII-D, RMPs are found to significantly affect fluctuations, flow, transport, and resulting profiles on the \mbox{DIII-D} tokamak. Intermediate-$k$ fluctuation levels ($1 \leq k\rho_s \leq 2$, measured by Doppler backscattering) and poloidal flow can increase in magnitude ($\tilde{n}/n$ increases of 20\%-30\% or larger) in the pedestal region during RMP. Linear growth rates from the trapped-gyro-Landau-fluid TGLF code indicate increased growth rates in this range of wavenumbers consistent with measurements. In addition, correlation electron cyclotron measurements of temperature fluctuations show a broadband increase during ELM suppressed RMP operation consistent with increased thermal transport.