Particle transport studies with applied resonant fields on TEXT
- 1 January 1990
- journal article
- letter
- Published by IOP Publishing in Nuclear Fusion
- Vol. 30 (1) , 167-173
- https://doi.org/10.1088/0029-5515/30/1/014
Abstract
Externally applied resonant magnetic fields have been used on TEXT to modify the particle flux and the radial electric field near the plasma edge. Magnetic fields with primary mode numbers m/n = 7/3 and 7/2, and an average radial field amplitude |br|/B 0.1% have been employed. This perturbation produces mixed islands and stochastic regions at the plasma edge (r/a ≥ 0.8) without affecting the interior. Working particle transport is shown to be increased by typically 30% only in the presence of (computed) magnetic islands. The effect is diminished at high perturbing field strength when the islands become stochastic. A novel transport mechanism due to × convection is proposed to explain this. Outward impurity transport is increased as well.Keywords
This publication has 14 references indexed in Scilit:
- Electron thermal confinement studies with applied resonant fields on TEXTNuclear Fusion, 1989
- Control of the tokamak edge plasma by static and rotating helical magnetic limitersNuclear Fusion, 1988
- Global particle confinement in the Texas Experimental TokamakNuclear Fusion, 1987
- Plasma-wall interaction and plasma performance in textor — A reviewJournal of Nuclear Materials, 1987
- TEXT heavy ion beam probe systemReview of Scientific Instruments, 1986
- Preliminary results from the ergodic magnetic limiter experiment on the TEXT experimental tokamakJournal of Nuclear Materials, 1984
- The Texas Experimental Tokamak (Text) Facility User's FacilityNuclear Technology - Fusion, 1981
- Electron Dynamics Associated with Stochastic Magnetic and Ambipolar Electric FieldsPhysical Review Letters, 1981
- A helical magnetic limiter for boundary layer control in large tokamaksNuclear Fusion, 1981
- Resonant helical divertorPhysics Letters A, 1977