@article{oai:nifs-repository.repo.nii.ac.jp:00000535,
 author = {Ida,  K. and Funaba,  H. and Kado,  S. and Narihara,  K. and Tanaka,  K. and Takeiri,  Y. and Nakamura,  Y. and Ohyabu,  N. and Yamazaki,  K. and Yokoyama,  M. and Murakami,  S. and Ashikawa,  N. and deVries,  P.C. and Emoto,  M. and Goto,  M. and Idei,  H. and Ikeda,  K. and Inagaki,  S. and Inoue,  N. and Isobe,  M. and Itoh,  K. and Kaneko,  O. and Kawahata,  K. and Khlopenkov,  K. and Komori,  A. and Kubo,  S. and Kumazawa,  R. and Liang,  Y. and Masuzaki,  S. and Minami,  T. and Miyazawa,  J. and Morisaki,  T. and Morita,  S. and Mutoh,  T. and Muto,  S. and Nagayama,  Y. and Nakanishi,  H. and Nishimura,  K. and Noda,  N. and Notake,  T. and Kobuchi,  T. and Ohdachi,  S. and Ohkubo,  K. and Oka,  Y. and Osakabe,  M. and Ozaki,  T. and Pavlichenko,  R.O. and Peterson,  B.J. and Sagara,  A. and Saito,  K. and Sakakibara,  S. and Sakamoto,  R. and Sanuki,  H. and Sasao,  H. and Sasao,  M. and Sato,  K. and Sato,  M. and Seki,  T. and Shimozuma,  T. and Shoji,  M. and Suzuki,  H. and Sudo,  S. and Tamura,  N. and Toi,  K. and Tokuzawa,  T. and Torii,  Y. and Tsumori,  K. and Yamamoto,  T. and Yamada,  H. and Yamada,  I. and Yamaguchi,  S. and Yamamoto,  S. and Yoshimura,  Y. and Watanabe,  K.Y. and Watari,  T. and Hamada,  Y. and Motojima,  O. and Fujiwara,  M.},
 issue = {No.23},
 journal = {Physical Review Letters},
 month = {Jun},
 note = {Recent large helical device experiments revealed that the transition from ion root to electron root occurred for the first time in neutral-beam-heated discharges, where no nonthermal electrons exist. The measured values of the radial electric field were found to be in qualitative agreement with those estimated by neoclassical theory. A clear reduction of ion thermal diffusivity was observed after the mode transition from ion root to electron root as predicted by neoclassical theory when the neoclassical ion loss is more dominant than the anomalous ion loss.},
 title = {Reduction of Ion Thermal Diffusivity Associated with the Transition of the Radial Electric Field in Neutral-Beam-Heated Plasmas in the Large Helical Device},
 volume = {Vol.86},
 year = {2001}
}