Application of RF Power to Plasma Flow Drive in Fusion Confinement

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Wave induced flows can produce radially sheared velocity profiles that can in turn stabilize drift wave turbulence and improve plasma confinement. A second-order kinetic theory is developed in one-dimensional slab geometry to treat radio frequency (RF)-driven plasma flows. The Vlasov equation is solved to second order in the RF electric field. Moments of the second-order distribution function give time-averaged expressions for the heating rate, the wave kinetic flux, and the RF force exerted on the plasma. On the collisional or transport time scale, the RF force in the poloidal direction is balanced by neoclassical viscosity, and the force in the ... continued below

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3 pages

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Batchelor, D.B.; Berry, L.A.; Carter, M.D. & Jaeger, E.F. September 13, 1999.

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Description

Wave induced flows can produce radially sheared velocity profiles that can in turn stabilize drift wave turbulence and improve plasma confinement. A second-order kinetic theory is developed in one-dimensional slab geometry to treat radio frequency (RF)-driven plasma flows. The Vlasov equation is solved to second order in the RF electric field. Moments of the second-order distribution function give time-averaged expressions for the heating rate, the wave kinetic flux, and the RF force exerted on the plasma. On the collisional or transport time scale, the RF force in the poloidal direction is balanced by neoclassical viscosity, and the force in the radial direction is balanced direction by ambipolar electric fields. Comparison is made with previous theories which have relied on incompressible fluid approximations. Very substantial differences are seen in situations involving the Ion Bernstein Wave, a compressional wave.

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3 pages

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  • International Conference on Electromagnetics in Advanced Applications, Torino, Italy, September 13-17, 1999

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  • Other: DE00008190
  • Report No.: ORNL/CP-103661
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 8190
  • Archival Resource Key: ark:/67531/metadc738032

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 13, 1999

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • Feb. 15, 2016, 12:16 p.m.

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Batchelor, D.B.; Berry, L.A.; Carter, M.D. & Jaeger, E.F. Application of RF Power to Plasma Flow Drive in Fusion Confinement, article, September 13, 1999; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc738032/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.