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in publisher: "General Atomics, San Diego, CA United States"

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Evidence for modified transport due to sheared E x B flows in high-temperature plasmas

Sheared mass flows are generated in many fluids and are often important for the dynamics of instabilities in these fluids. Similarly, large values of the E x B velocity have been observed in magnetic confinement machines and there is theoretical and experimental evidence that sufficiently large shear in this velocity may stabilize important instabilities. Two examples of this phenomenon have been observed in the DIII-D tokamak. In the first example, sufficient heating power can lead to the L-H … more

Date: November 1, 1994

Creator: Groebner, R. J.; Burrell, K. H. & Austin, M. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Extended theory of main ion and impurity rotation and bootstrap current in a shear layer

In this paper, standard neoclassical theory has been extended into the shear layer. Main ion and impurity ion rotation velocity and bootstrap current within shear layer in H-mode are discussed. Inside the H-mode shear layer, standard neoclassical theory is not valid since the ion poloidal gyroradius becomes comparable to pressure gradient and electric field gradient scale length. To allow for arbitrary ratio of {rho}{theta}i/L{sub n} and {rho}{theta}i/L{sub Er} a new kinetic theory of main ion … more

Date: November 1, 1993

Creator: Kim, Y. B.; Hinton, F. L.; St. John, H.; Taylor, T. S. & Wroblewski, D.