@techreport{oai:nifs-repository.repo.nii.ac.jp:00010077,
 author = {"Nunami,  M. and Kanno,  R. and Satake,  S. and Takamaru,  H. and Hayashi,  T."},
 month = {Mar},
 note = {"In recent Large Helical Device (LHD) experiments, radial profiles of ion temperature, electric field, etc. are measured in the m/n = 1/1 magnetic island produced by island control coils, where m is the poloidal mode number and n the toroidal mode number. When the transport of the plasma in the radial profiles is numerically analyzed, an average over a magnetic flux-surface in the island is a very useful concept to understand the transport. On averaging, a proper labeling of the flux-surfaces is necessary.In general, it is not easy to label the flux-surfaces in the magnetic field with the island, compared with the case of a magnetic field configuration having nested flux-surfaces. In the present paper, we have developed a new computational technique to label the magnetic flux-surfaces. This technique is constructed by using an optimization algorithm, which is known as an optimization method called the simulated annealing method. The flux-surfaces are discerned by using two labels: one is classification of  the magnetic field structure, i.e., core, island, ergodic, and outside regions, and the other is a value of the toroidal magnetic flux. We have applied the technique to an LHD configuration with the m/n = 1/1 island, and successfully obtained the discrimination of the magnetic field structure."},
 title = {Development of Computational Technique for Labeling Magnetic Flux-surfaces},
 year = {2006}
}