TITLE

Neoclassical toroidal viscosity and error-field penetration in tokamaks

AUTHOR(S)
Cole, A. J.; Hegna, C. C.; Callen, J. D.
PUB. DATE
May 2008
SOURCE
Physics of Plasmas;May2008, Vol. 15 Issue 5, p056102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
32509567

 

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