Core Poloidal Rotation and Internal Trnasport Barrier Formation in TFTR | Zendy

E.J. Synakowski | Zendy; F.M. Levinton | Zendy; M.C. Zarnstorff | Zendy; R.E. Bell | Zendy; S.H. Batha | Zendy; et al. | Zendy

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Core Poloidal Rotation and Internal Trnasport Barrier Formation in TFTR

Author(s) -

E.J. Synakowski,

F.M. Levinton,

M.C. Zarnstorff,

R.E. Bell,

S.H. Batha,

et al.

Publication year - 1998

Language(s) - English

Resource type - Reports

DOI - 10.2172/3750

Subject(s) - rotation (mathematics) , plasma , atomic physics , physics , core (optical fiber) , shear (geology) , tokamak , impurity , electric field , nuclear physics , materials science , optics , geometry , quantum mechanics , mathematics , composite material

Impurity poloidal rotation velocities have been measured in the core of TFTR plasmas using a new spectroscopic diagnostic. Two types of transitions to enhanced confinement in reversed shear plasmas are examined. A bifurcation in carbon poloidal rotation is observed to occur before the transition to enhanced confinement for one of these types, while other measured plasmas parameters remain constant. A narrow radial region with reversed poloidal rotation and rotational shear is established 60-100 ms before the transition, and is associated with a large negative radial electric field

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