@article{7079,
  author = {M. Holzl and S. Gunter and I.G.J. Classen and Q. Yu and E. Delabie},
  title = {Determination of the heat diffusion anisotropy by comparing measured and simulated electron temperature profiles across magnetic islands},
  abstract = {The ratio between the heat diffusion coefficients parallel and perpendicular to the magnetic field lines, chi(parallel to)/chi(perpendicular to), influences the flattening of the temperature profile inside magnetic islands and the driving term of neoclassical tearing modes (Fitzpatrick 1995 Phys. Plasmas 2 825). The value of this anisotropy is, however, not easily accessible experimentally. This paper presents a method to determine it from a systematic comparison of temperature measurements at magnetic islands with numerical heat diffusion simulations. The application of the method is demonstrated for a 2/1 magnetic island in the TEXTOR tokamak, where a heat diffusion anisotropy of 108 is observed. This is lower by a factor of 40 than predicted by Spitzer and Harm (Spitzer and Harm 1953 Phys. Rev. 89 997) and a strong indication that the heat flux limit determines the flattening of the electron temperature across magnetic islands.},
  year = {2009},
  journal = {Nuclear Fusion},
  volume = {49},
  number = {11},
  pages = {7},
  month = {Nov},
  isbn = {0029-5515},
  url = {<Go to ISI>://000272077800010 },
  note = {ISI Document Delivery No.: 523MKTimes Cited: 0Cited Reference Count: 16},
  language = {English},
}