Turbulent momentum transport in core tokamak plasmas and penetration of scrape-off layer flows

被引：14

作者：

Abiteboul, J. ^{[1
]}

Ghendrih, Ph ^{[1
]}

Grandgirard, V. ^{[1
]}

Cartier-Michaud, T. ^{[1
]}

Dif-Pradalier, G. ^{[1
]}

Garbet, X. ^{[1
]}

Latu, G. ^{[1
]}

Passeron, C. ^{[1
]}

Sarazin, Y. ^{[1
]}

Strugarek, A. ^{[1
]}

Thomine, O. ^{[1
]}

Zarzoso, D. ^{[1
]}

机构：

[1] CEA, IRFM, F-13108 St Paul Les Durance, France

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2013年 / 55卷 / 07期

关键词：

TOROIDAL ROTATION; MODES;

D O I：

10.1088/0741-3335/55/7/074001

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The turbulent transport of toroidal angular momentum in the core of a tokamak plasma is investigated in global, full-f gyrokinetic simulations, performed with the GYSELA code in the flux-driven regime. During the initial turbulent phase, a front of positive Reynolds stress propagates radially, generating intrinsic toroidal rotation from a vanishing initial profile. This is also accompanied by a propagating front of turbulent heat flux. In the statistical steady-state regime, turbulent transport exhibits large-scale avalanche-like events which are found to transport both heat and momentum, and similar statistical properties are obtained for both fluxes. The impact of scrape-off layer flows is also investigated by modifying the boundary conditions in the simulations. The observed impact is radially localized for L-mode like poloidal profiles of parallel velocity at the edge, while a constant velocity at the edge can modify the core toroidal rotation profile in a large fraction of the radial domain.

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页数：11

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