Neoclassical toroidal viscosity and error-field penetration in tokamaks

被引:65
作者
Cole, A. J. [1 ]
Hegna, C. C. [1 ]
Callen, J. D. [1 ]
机构
[1] Univ Wisconsin, Madison, WI 53706 USA
关键词
D O I
10.1063/1.2838241
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
A model for field error penetration is developed that includes nonresonant as well as the usual resonant field error effects. The nonresonant components cause a neoclassical toroidal viscous torque that tries to keep the plasma rotating at a rate comparable to the ion diamagnetic frequency. The new theory is used to examine resonant error-field penetration threshold scaling in ohmic tokamak plasmas. Compared to previous theoretical results, the plasma is found to be less susceptible to error-field penetration and locking, by a factor that depends on the nonresonant error-field amplitude. (C) 2008 American Institute of Physics.
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页数:6
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