This title appears in the Scientific Report : 2010 

Neoclassical tearing mode (NTM) magnetic spectrum and magnetic coupling in JET tokamak
Baruzzo, M.
Alper, B. / Bolzonella, T. / Brix, M. / Buratti, P. / Challis, C.D. / Crisanti, F. / de la Luna, E. / de Vries, P.C. / Giroud, C. / Hawkes, N.C. / Howell, D.C. / Imbeaux, F. / Joffrin, E. / Koslowski, H.R. / Litaudon, X. / Mailloux, J. / Sips, A.C.C. / Tudisco, O.
Plasmaphysik; IEK-4
Plasma physics and controlled fusion, 52 (2010) S. 075001
Bristol IOP Publ. 2010
075001
10.1088/0741-3335/52/7/075001
Journal Article
Fusion
Plasma Physics and Controlled Fusion 52
J
Please use the identifier: http://dx.doi.org/10.1088/0741-3335/52/7/075001 in citations.
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.