The effect of the radial electric field on the L--H transitions in tokamaks

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860463· OSTI ID:7285385

Rozhansky, V; Tendler, M ^[1]

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1. Fusion Plasma Physics, The Alfven Laboratory, Royal Institute of Technology, 10044, Stockholm (Sweden)

It is well known that usual assumptions of neoclassical theory become invalid if very large gradients occur at the plasma edge. Therefore neoclassical theory of plasma rotation in tokamaks is revisited in order to account for anomalous transport driven by a turbulence. It is shown that this model yields both steep and gradual profiles for the poloidal rotation velocity at the edge corresponding to the H and L regimes of confinement, respectively. Results and conclusions are focused on experiments employing the biased electrode technique. Regimes with fast poloidal rotation in excess of poloidal sound speed are considered with the emphasis on relaxation.

• OSTI ID: 7285385
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 4:7; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700310* -- Plasma Confinement-- (1992-)
700330 -- Plasma Kinetics
Transport
& Impurities-- (1992-)
CLOSED PLASMA DEVICES
CONFINEMENT
NEOCLASSICAL TRANSPORT THEORY
PLASMA
PLASMA CONFINEMENT
ROTATING PLASMA
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT THEORY
TURBULENCE