The role of flow shear in the ballooning stability of tokamak transport barriers

A. J. Webster; H. R. Wilson; A. M.M. Scaife

doi:10.1063/1.1687724

The role of flow shear in the ballooning stability of tokamak transport barriers

A. J. Webster, H. R. Wilson, A. M.M. Scaife

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Abstract

The eigenmode approach which was applied to stability of ballooning modes in internal transport barriers (ITB) was described. The equilibrium profiles had negligible effect on mode structure at low magnetic shear in absence of flow shear. The structure and stability of ballooning modes were different when effect of weak equilibrium variations were included and flow shear stabilized the ballooning modes. The structure of finite ballooning mode in flow shear was significantly influenced by radially varying equilibrium.

Original language	English
Pages (from-to)	2135-2143
Number of pages	9
Journal	Physics of Plasmas
Volume	11
Issue number	5 PART 1
DOIs	https://doi.org/10.1063/1.1687724
State	Published - May 2004
Externally published	Yes

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abstract = "The eigenmode approach which was applied to stability of ballooning modes in internal transport barriers (ITB) was described. The equilibrium profiles had negligible effect on mode structure at low magnetic shear in absence of flow shear. The structure and stability of ballooning modes were different when effect of weak equilibrium variations were included and flow shear stabilized the ballooning modes. The structure of finite ballooning mode in flow shear was significantly influenced by radially varying equilibrium.",

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AB - The eigenmode approach which was applied to stability of ballooning modes in internal transport barriers (ITB) was described. The equilibrium profiles had negligible effect on mode structure at low magnetic shear in absence of flow shear. The structure and stability of ballooning modes were different when effect of weak equilibrium variations were included and flow shear stabilized the ballooning modes. The structure of finite ballooning mode in flow shear was significantly influenced by radially varying equilibrium.

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The role of flow shear in the ballooning stability of tokamak transport barriers

Abstract

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