Turbulent edge structure formation in complex configurations

Kendl, A.; Scott, B. D.; Ball, R.; Dewar, R. L.

doi:10.1063/1.1602074

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Turbulent edge structure formation in complex configurations

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Kendl, A.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Scott, B. D.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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引用

Kendl, A., Scott, B. D., Ball, R., & Dewar, R. L. (2003). Turbulent edge structure formation in complex configurations. Physics of Plasmas, 10(9), 3684-3691. doi:10.1063/1.1602074.

引用: https://hdl.handle.net/11858/00-001M-0000-0027-3AC2-9

要旨

Formation of nonlinear structures in drift-Alfvén turbulence is investigated in the often complex edge geometries of stellarator and tokamak configurations, by analysis of drift wave turbulence simulations using a model in which three-dimensional magnetic geometries are approximated. The structures of parallel mode extension, radially sheared zonal flows and perpendicular mode spectra are highlighted in particular for three-dimensional stellarator magnetic fields and shaped tokamaks. Specific characteristics of advanced stellarators in comparison to (lower aspect ratio) circular tokamaks are a less pronounced ballooning structure of the modes, a strong influence of local magnetic shear on amplitude structure and average, and stronger level of zonal flows due to lower geodesic curvature.