Open AccessMicroturbulence and Flow Shear in High-performance JET ITB Plasma
Author(s) -
R. Budny,
A. André,
A. Bicoulet,
C. Challis,
G. D. Conway,
W. Dorland,
D. R. Ernst,
T.S. Hahm,
T. C. Hender,
D. McCune,
G. Rewoldt,
S. E. Sharapov
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/792991
Subject(s) - microturbulence , linear growth , physics , toroid , shearing (physics) , joint european torus , plasma , diii d , jet (fluid) , radius , torus , shear (geology) , shear flow , mechanics , instability , tokamak , atomic physics , nuclear physics , geometry , materials science , mathematics , thermodynamics , computer security , computer science , composite material
The transport, flow shear, and linear growth rates of microturbulence are studied for a Joint European Torus (JET) plasma with high central q in which an internal transport barrier (ITB) forms and grows to a large radius. The linear microturbulence growth rates of the fastest growing (most unstable) toroidal modes with high toroidal mode number are calculated using the GS2 and FULL gyrokinetic codes. These linear growth rates, gamma (subscript lin) are large, but the flow-shearing rates, gamma (subscript ExB) (dominated by the toroidal rotation contribution) are also comparably large when and where the ITB exists