Application of RF Power to Plasma Flow Drive in Fusion Confinement

Conference · Mon Sep 13 04:00:00 EDT 1999

OSTI ID:8190

Batchelor, D B ^[1]; Berry, L A; Carter, M D; Jaeger, E F

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1. ORNL

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• Sponsoring Organization: USDOE Office of Science
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 8190
• Report Number(s): ORNL/CP-103661; AT 50 20 10 0; ON: DE00008190
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Kinetics
Mathematical Models
Plasma Acceleration
Plasma Confinement
RF Systems