Testing the Validity of the Neoclassical Toroidal Viscosity Model of Torque due to 3D Non-Resonant Magnetic Fields
POSTER
Abstract
Understanding the torque applied by resonant and non-resonant magnetic perturbations and its effect on rotation is essential to predict confinement and stability in burning plasmas. Non-axisymmetric 3D fields produced in the DIII-D tokamak apply a torque to the plasma, which can be evaluated through its effect on the plasma rotation. One explanation for this torque is Neoclassical Toroidal Viscosity (NTV) acting through non-resonant field components [1]. We have developed a software framework in which magnetic perturbations calculated by the state of the art two fluid MHD code M3D-C1 can be used in NTV calculations. For discharges with applied external magnetic fields in DIII-D, the experimentally determined torques will be analyzed and compared with NTV models.\\[4pt] [1] J.D. Callen, Nucl. Fusion \textbf{51}, 094026 (2011).
*This work supported in part by the US Department of Energy under DE-FC02-04ER54698, DE-FG02-92ER54139, DE-AC05-06OR23100 and the National Undergraduate Fellowship in Fusion Science and Engineering.