Turbulent edge structure formation in complex configurations | Zendy

A. Kendl | Zendy; B. Scott | Zendy; Rowena Ball | Zendy; R. L. Dewar | Zendy

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Turbulent edge structure formation in complex configurations

Author(s) -

A. Kendl,

B. Scott,

Rowena Ball,

R. L. Dewar

Publication year - 2003

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.1602074

Subject(s) - physics , stellarator , tokamak , turbulence , curvature , ballooning , shear (geology) , plasma , computational physics , mechanics , classical mechanics , geometry , nuclear physics , petrology , mathematics , geology

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

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