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VOLUME 53 (1991) | ISSUE 2 | PAGE 80
Effect of a radial electric field on the transition to improved confinement in a tokamak
When there is a sufficient number of banana particles in the plasma near the wall in a tokamak, or when a radial potential difference (of arbitrary polarity) is deliberately applied, the radial electric field near the periphery changes abruptly. The rapid rotation associated with this effect and the shear of this rotation can suppress both anomalous and neoclassical transport, causing a transition to the improved confinement mode (the L-H transition).