Neoclassical tearing mode (NTM) magnetic spectrum and magnetic coupling in JET tokamak

M. Baruzzo, B. Alper, T. Bolzonella, M. Brix, P. Buratti, C.D. Challis, F. Crisanti, E. De La Luna, P.C. De Vries, C. Giroud, N.C. Hawkes, D.F. Howell, F. Imbeaux, E. Joffrin, H.R. Koslowski, X. Litaudon, J. Mailloux, A.C.C. Sips, O. Tudisco

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Abstract

An experimental study on the poloidal mode number (m) spectrum produced by a single toroidal mode number (n) neoclassical tearing mode (NTM) in the JET tokamak is presented. Clear evidence of the existence of more than one significant m component is given. The analysis is performed comparing several methods and diagnostics; among the latter we mention high frequency magnetic pick-up coils and an electron cyclotron emission radiometer, which measures detailed electron temperature radial profiles at high time resolution. The two diagnostics are also used together in a cross coherence calculation technique. The issue of the interaction of this multiple m structure with the plasma is addressed as well, with particular attention paid to plasma toroidal rotation and rotation shear, obtained from charge exchange spectroscopy data. This effect has been studied under two different operational plasma scenarios on JET in order to investigate both dependences on plasma parameters and consequences on the scenario itself. © 2010 IOP Publishing Ltd.
Original languageEnglish
Article number075001
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume52
Issue number7
DOIs
Publication statusPublished - 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Baruzzo, M., Alper, B., Bolzonella, T., Brix, M., Buratti, P., Challis, C. D., ... Tudisco, O. (2010). Neoclassical tearing mode (NTM) magnetic spectrum and magnetic coupling in JET tokamak. Plasma Physics and Controlled Fusion, 52(7), -. [075001]. https://doi.org/10.1088/0741-3335/52/7/075001