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Turbulence Suppression by E x B Shear in JET Optimized Shear Pulses
Authors: M.A. Beer, R.V. Budny, C.D. Challis, G. Conway, C. Gormezano, G. Rewoldt, A.C.C. Sips, F.X. Soldner, B.J.D. Tubbing, and M. Von Hellerman
Date of PPPL Report: January 2000
Published in: the 26th European Physical Society (EPS) Conference on Controlled Fusion and Plasma Physics (Maastricht, Netherlands, June 14-18, 1999), edited by B. Schweer, G. Van Oost, E. Vietzke, Europhysics Confrence Abstracts (ECA) Vol. 23J (European Physical Society, 1999) 117-120. The conference proceedings is available in pdf format at the following web site: http://epsppd.epfl.ch/ (active as of August 16, 2000).
We calculate microinstability growth rates in JET optimized shear plasmas with a comprehensive gyrofluid model, including sheared E x B flows, trapped electrons, and all dominant ion species in realistic magnetic geometry. We find good correlation between E x B shear suppression of microinstabilities and both the formation and collapse of the internal transport barrier.
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