Observation of plasma toroidal-momentum dissipation by neoclassical toroidal viscosity

W. Zhu, S. A. Sabbagh, R. E. Bell, J. M. Bialek, M. G. Bell, B. P. Leblanc, S. M. Kaye, F. M. Levinton, J. E. Menard, Ker-Chung Shaing, A. C. Sontag, H. Yuh

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Abstract

Dissipation of plasma toroidal angular momentum is observed in the National Spherical Torus Experiment due to applied nonaxisymmetric magnetic fields and their plasma-induced increase by resonant field amplification and resistive wall mode destabilization. The measured decrease of the plasma toroidal angular momentum profile is compared to calculations of nonresonant drag torque based on the theory of neoclassical toroidal viscosity. Quantitative agreement between experiment and theory is found when the effect of toroidally trapped particles is included.

Original languageEnglish
Article number225002
JournalPhysical review letters
Volume96
Issue number22
DOIs
Publication statusPublished - 2006 Jun 19

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Zhu, W., Sabbagh, S. A., Bell, R. E., Bialek, J. M., Bell, M. G., Leblanc, B. P., Kaye, S. M., Levinton, F. M., Menard, J. E., Shaing, K-C., Sontag, A. C., & Yuh, H. (2006). Observation of plasma toroidal-momentum dissipation by neoclassical toroidal viscosity. Physical review letters, 96(22), [225002]. https://doi.org/10.1103/PhysRevLett.96.225002