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Mechanisms governing radial heat fluxes in tokamak plasma

Razumova, K. A. ; Timchenko, N. N. ; Dnestrovskij, A. Yu ; Lysenko, S. E.

Plasma physics reports, 2016-09, Vol.42 (9), p.809-817 [Periódico revisado por pares]

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Título:
Mechanisms governing radial heat fluxes in tokamak plasma
Autor: Razumova, K. A. ; Timchenko, N. N. ; Dnestrovskij, A. Yu ; Lysenko, S. E.
Assuntos: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; Atomic ; DIFFUSION BARRIERS ; EXCITATION ; HEAT FLUX ; HEAT TRANSFER ; HYPOTHESIS ; Molecular ; Optical and Plasma Physics ; Physics ; Physics and Astronomy ; PLASMA ; Plasmas ; Plasmas (physics) ; SPECTRA ; TOKAMAK DEVICES ; Tokamaks ; Transport properties ; TURBULENCE
É parte de: Plasma physics reports, 2016-09, Vol.42 (9), p.809-817
Descrição: A method for analyzing the characteristics of turbulence responsible for radial heat transport is proposed. The method is based on the previously proposed hypotheses (to a great extent, confirmed experimentally) concerning the consistency of normalized pressure profiles in tokamak plasmas and the mechanism of internal transport barrier formation. Using the proposed approach, it is shown that, under an external action on the plasma, when the plasma heat flux onto the wall grows, the spectrum of turbulent modes broadens due to the excitation of modes with lower poloidal numbers m . Thus, in contrast to the conventional diffusion approach, the transport coefficient depends on the flux intensity. A mechanism of formation of internal transport barriers is proposed.
Editor: Moscow: Pleiades Publishing
Idioma: Inglês

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