Effect of nonaxisymmetric perturbations on the structure of a tokamak poloidal divertor
| Autor: | A. Reiman, N. Pomphrey |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Toroid Tokamak Field line Divertor Computational Mechanics General Physics and Astronomy Perturbation (astronomy) Condensed Matter Physics Computational physics Magnetic field law.invention Physics::Plasma Physics Mechanics of Materials law Atomic physics Axial symmetry Bifurcation |
| Zdroj: | Physics of Fluids B: Plasma Physics. 4:938-948 |
| ISSN: | 0899-8221 |
| Popis: | The effects of n=1 nonaxisymmetric perturbations on a tokamak poloidal divertor are described. Despite the existence of a region of chaotic field line trajectories outside the last closed flux surface, the footprint of the trajectories on the divertor plates is found to be largely coherent, forming a spiral structure. At a fixed toroidal angle, the footprint exhibits a bifurcation similar to that seen experimentally on DIII‐D [Nucl. Fusion 28, 902 (1988)]. For field errors of the magnitude that exist in present‐day tokamaks, the width of the nonaxisymmetric structure in the divertor footprint is comparable to the width of the scrape‐off layer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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