Shear flows at the tokamak edge and their role in core rotation and the L-H transition

被引：17

作者：

Aydemir, A.Y. ^{[1
]}

机构：

[1] Institute for Fusion Studies, University of Texas at Austin, Austin

来源：

Physical Review Letters | 2007年 / 98卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.98.225002

中图分类号：

学科分类号：

摘要：

Pfirsch-Schlüter fluxes in tokamaks are shown to drive strong poloidal and toroidal shear flows that are localized to the edge and scrape-off layer in the presence of temperature gradients and finite bootstrap current in the pedestal. Within a magnetohydrodynamic model, the effect of these flows on core rotation and their role in the magnetic configuration dependence of the power threshold for the low- (L-) to high- (H-)mode transition are discussed. Theoretical predictions based on symmetries of the underlying equations, coupled with computational results, are found to be in general agreement with observations in the Alcator C-Mod tokamak. © 2007 The American Physical Society.

引用

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