SUBJECT: M.S. Thesis Presentation
   
BY: Theresa Wilks
   
TIME: Tuesday, November 27, 2012, 10:00 a.m.
   
PLACE: Boggs Building, 3-47
   
TITLE: Toroidal Phasing of Resonant Magnetic Perturbation Effect on Edge Pedestal Transport in the DIII-D Tokamak
   
COMMITTEE: Dr. Weston Stacey, Chair (NRE)
Dr. Todd Evans (General Atomics)
Dr. Bojan Petrovic (NRE)
Dr. Glenn Sjoden (NRE)
 

SUMMARY

Resonant Magnetic Perturbation (RMP) fields produced by external control coils are considered a viable option for the suppression of Edge Localized Modes (ELMs) in present and future tokamaks. Repeated reversals of the toroidal phase of the I-coil magnetic field in RMP shot 147170 on DIII-D has generated uniquely different edge pedestal profiles, implying different edge transport phenomena. The causes, trends, and implications of RMP toroidal phase reversal on edge transport are analyzed by comparing various parameters at φ=0 and φ=60 with an I-coil toroidal mode number of n=3. An analysis of diffusive and non-diffusive transport effects of these magnetic perturbations in the plasma edge has been performed. The change in the diffusive and non-diffusive transport in the edge pedestal for this RMP shot is characterized by interpreting the ion and electron heat diffusivities, angular momentum transport frequencies, ion diffusion coefficients, and the pinch velocities for both phases.