Session GP9: Poster Session III: Laser and Beam-Driven Acceleration; DIII-D Tokamak I; General Tokamak; Field Reversed Configurations and Spheromaks; Mini-Conference: Integrated, Multiphysics, High-Performance Computations for Magnetic Fusion Research
9:30 AM–9:30 AM, Tuesday, November 9, 2010
Room: Riverside West
Abstract ID: BAPS.2010.DPP.GP9.40
Abstract: GP9.00040 : Effects of 3D Magnetic Perturbations on DIII-D Reconstructed Equilibria
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Abstract 
Authors:
L.L. Lao
(General Atomics)
M.S. Chu
(General Atomics)
A. Collier
(General Atomics)
T.E. Evans
(General Atomics)
M.J. Schaffer
(General Atomics)
E.J. Strait
(General Atomics)
Q. Ren
(ASIPP)
R. Srinivasan
(IPR)
Y. Liu
(DUT)
Non-axisymmetric perturbation magnetic fields are routinely applied in \hbox{DIII-D} experiments to study and control MHD modes. The effects of the perturbation fields on the background 2D equilibrium are studied using a set of recent \hbox{DIII-D} single- and double-null \hbox{H-mode} discharges with varying amount of \hbox{I-coil} perturbations. The reconstructed vertical positions of the plasma separatrix boundary at the \hbox{DIII-D} Thomson diagnostic viewing chord are compared against those estimated from the measured edge electron temperature profiles. For lower single-null and double-null plasmas, the reconstructed vertical boundary locations generally agree with those estimated from the edge temperature profiles within $\sim$1 cm. For upper single-null plasmas, the differences in the Thomson boundary locations tend to be greater. The effects of the perturbation fields on the 2D reconstructed equilibria are also being analyzed using a set of 3D codes TRIP3D without and \hbox{MARS-F} and VMOM3D with plasma response. Details will be presented.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DPP.GP9.40