Effect of 3D magnetic perturbations on the plasma rotation in ASDEX Upgrade. (3rd June 2016)

• Record Type: Journal Article
• Authors: Martitsch, A F; Kasilov, S V; Kernbichler, W; Kapper, G; Albert, C G; Heyn, M F; Smith, H M; Strumberger, E; Fietz, S; Suttrop, W; Landreman, M
• Other Names: collab.; collab.
• Is Part Of: Plasma physics and controlled fusion. Volume 58:Number 7(2016:Jul.)
• Publication Date: 2016-06-03
• Subjects: neoclassical toroidal viscosity -- quasilinear theory -- tokamak -- numerical modelling -- magnetic perturbations -- ASDEX Upgrade -- plasma rotation; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/0741-3335/58/7/074007
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: The toroidal torque due to the non-resonant interaction with external magnetic perturbations (TF ripple and perturbations from ELM mitigation coils) in ASDEX Upgrade is modelled with help of the NEO-2 and SFINCS codes and compared to semi-analytical models. It is shown that almost all non-axisymmetric transport regimes contributing to neoclassical toroidal viscosity (NTV) are realized within a single discharge at different radial positions. The NTV torque is obtained to be roughly a quarter of the NBI torque. This indicates the presence of other important momentum sources. The role of these momentum sources and possible integral torque balance measurements are briefly discussed.