Propagation Dynamics Associated with Resonant Magnetic Perturbation Fields in High-Confinement Mode Plasmas inside the KSTAR Tokamak,Physical Review Letters

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Propagation Dynamics Associated with Resonant Magnetic Perturbation Fields in High-Confinement Mode Plasmas inside the KSTAR Tokamak
Physical Review Letters ( IF 8.1 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1103/physrevlett.119.205001
W. W. Xiao , T. E. Evans , G. R. Tynan , S. W. Yoon , Y. M. Jeon , W. H. Ko , Y. U. Nam , Y. K. Oh ,

The propagation dynamics of resonant magnetic perturbation fields in KSTAR

H

-mode plasmas with injection of small edge perturbations produced by a supersonic molecular beam injection is reported for the first time. The results show that the perturbation field first excites a plasma response on the

q = 3

magnetic surface and then propagates inward to the

q = 2

surface with a radially averaged propagation velocity of resonant magnetic perturbations field equal to

32.5 m / s

. As a result, the perturbation field brakes the toroidal rotation on the

q = 3

surface first causing a momentum transport perturbation that propagates both inward and outward. A higher density fluctuation level is observed. The propagation velocity of the resonant magnetic perturbations field is larger than the radial propagation velocity of the perturbation in the toroidal rotation.

更新日期：2017-11-16

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