Traces of stable and unstable manifolds in heat flux patterns

Journal Article · Sun Apr 15 00:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2715548· OSTI ID:20974931

Wingen, A; Jakubowski, M; Spatschek, K H; Abdullaev, S S; Finken, K H; Lehnen, M ^[1]

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1. Institut fuer Theoretische Physik, Heinrich-Heine-Universitaet Duesseldorf, D-40225 Duesseldorf (Germany)

Experimental observations of heat fluxes on divertor plates of tokamaks show typical structures (boomerang wings) for varying edge safety factors. The heat flux patterns follow from general principles of nonlinear dynamics. The pattern selection is due to the unstable and stable manifolds of the hyperbolic fixed points of the last intact island chain. Based on the manifold analysis, the experimental observations can be explained in full detail. Quantitative results are presented in terms of the penetration depths of field lines.

• OSTI ID: 20974931
• Journal Information: Physics of Plasmas, Vol. 14, Issue 4; Other Information: DOI: 10.1063/1.2715548; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
DIVERTORS
HEAT FLUX
NONLINEAR PROBLEMS
PENETRATION DEPTH
PLASMA
PLASMA CONFINEMENT
PLASMA INSTABILITY
TOKAMAK DEVICES