Toroidal rotation braking with n = 1 magnetic perturbation field on JET

Y. Sun, Y. Liang, H.R. Koslowski, S. Jachmich, A. Alfier, O. Asunta, G. Corrigan, C. Giroud, M.P. Gryaznevich, D. Harting, T. Hender, E. Nardon, V. Naulin, V. Parail, T. Tala, C. Wiegmann, S. Wiesen

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Abstract

Astrong toroidal rotation braking has been observed in plasmas with application of an n = 1 magnetic perturbation field on the JET tokamak. Calculation results from the momentum transport analysis show that the torque induced by the n = 1 perturbation field has a global profile. The maximal value of this torque is at the plasma core region (? < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ? -√ ? regime in the plasma core, but it is close to the transition between the 1/? and ? -√ ? regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/? and ? -√ ? regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/? and ? -√ ? regimes. The NTV torque in the ? -√ ? regimes is enhanced using the Lagrangian variation of the magnetic field strength. However, it is still smaller than the observed torque by one order of magnitude. © 2010 IOP Publishing Ltd.
Original languageEnglish
Article number105007
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume52
Issue number10
DOIs
Publication statusPublished - Oct 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Sun, Y., Liang, Y., Koslowski, H. R., Jachmich, S., Alfier, A., Asunta, O., ... Wiesen, S. (2010). Toroidal rotation braking with n = 1 magnetic perturbation field on JET. Plasma Physics and Controlled Fusion, 52(10), -. [105007]. https://doi.org/10.1088/0741-3335/52/10/105007