Details

Autor(en) / Beteiligte

• Yang, S. M.
• Park, J.-K.
• Wang, Z. R.
• Ko, W. H.
• In, Y.
• Lee, J. H.
• Lee, K. D.
• Kim, S. K.

Titel

Nonambipolar Transport due to Electrons with 3D Resistive Response in the KSTAR Tokamak

Ist Teil von

• Physical review letters, 2019-08, Vol.123 (9), p.1, Article 095001

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

APS_美国物理学会过刊

Beschreibungen/Notizen

• A small nonaxisymmetric (3D) magnetic field can induce nonambipolar transport of the particle species confined in a tokamak and thus a significant change of plasma rotation. This process can be in a favor of instability control in the region where the tokamak plasma is sufficiently collisional and resistive, as observed in the applications of n=1 resonant magnetic perturbations to the KSTAR tokamak. The plasma rotation can be globally accelerated due to radially drifting electrons and constrained to the electron root, if the radial transport is enhanced by an amplified 3D response. This mechanism is verified by a kinetically self-consistent magnetohydrodynamic modeling for both response and transport, which offers the quantitative explanations on the internal n=1 structure detected by electron-cyclotron-emission imaging and the cocurrent plasma spinning observed in the experiments.