@techreport{oai:nifs-repository.repo.nii.ac.jp:00009564,
 author = {"Fujiwara,  M. and Kawahata,  K. and Ohyabu,  N. and Kaneko,  O. and Komori,  A. and Yamada,  H. and Ashikawa,  N. and Baylor,  L. R. and Combs,  S. K. and deVries,  P. C. and Emoto,  M. and Masuzaki,  S. and Minami,  T. and Miyajima,  J. and Morisaki,  T. and Morita,  S. and Murakami,  S. and Muto,  S. and Nagayama,  Y. and Nakajima,  N. and Nakamura,  Y. and Sagara,  A. and Nakanishi,  H. and Narihara,  K. and Nishimura,  K. and Noda,  N. and Notake,  T. and Ohdachi,  S. and Oka,  Y. and Okajima,  S. and Okamoto,  M. and Osakabe,  M. and Saito,  K. and Ozaki,  T. and Pavlichenko,  R. O. and Peterson,  B. J. 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 Watanabe,  T. and Shimozuma,  T. and Shoji,  M. and Sugama,  H. and Suzuki,  H. and Takechi,  M. and Takeiri,  Y. and Tamura,  N. and Tanaka,  K. and Toi,  K. and Tokuzawa,  T. and Wateri,  T. and Torii,  Y. and Tsumori,  K. and Watanabe,  K. Y. and Yamada,  I. and Yamaguchi,  S. and Yamamoto,  S. and Yokoyama,  M. and Yoshida,  N. and Yoshimura,  Y. and Zhao,  Y. P. and Akiyama,  R. and Kitagawa,  S. and Haba,  K. and Iima,  M. and Kodaira,  J. and Takita,  T. and Tsuzuki,  T. and Yamauchi,  K. and Yonezu,  H. and Chikaraishi,  H. and Hamaguchi,  S. and Imagawa,  S. and Kubota,  Y. and Inoue,  N. and Iwamoto,  A. and Mutoh,  T. and Maekawa,  R. and Mito,  T. and Murai,  K. and Nishimura,  A. and Chikaraishi,  H. and Takahata,  K. and Tamura,  H. and Yamada,  S. and Ejiri,  A. and Yanagi,  N. and Itoh,  K. and Matsuoka,  K. and Ohkubo,  K. and Ohtake,  I. and Satoh,  S. and Satow,  T. and Sudo,  S. and Tanahashi,  S. and Yamazaki,  K. and Fisher,  P. W. and Hamada,  Y. and Motojima,  O. and Funaba,  H. and Goto,  M. and Hartmann,  D. and Ida,  K. and Idei,  H. and Iio,  S. and Ikeda,  K. and Inagaki,  S. and Inoue,  N. and Isobe,  M. and Kado,  S. and Khlopenkov,  K. and Kobuchi,  T. and Krasilnikov,  A. V. and Kubo,  S. and Kumazawa,  R. and Leuterer,  F. and Liang,  Y. and Lyon,  J. F."},
 month = {Sep},
 note = {"Experimental studies on the Large Helical Device during the last two years are reviewed. After the start of LHD experiment in 1998, the magnetic field has been gradually raised up to 2.89 T. The heating power has been increased, up to 4.2 MW for NBI, 1.3 MW for ICRF, and 0.9 MW for ECRH, Upgrading the key hardware systems has led to the extension of the plasma parameters to (i) higher T_e [ T_e(0) = 4.4 keV at <ne> = 5.3 x 10^18 m^-3 and P_abs = 1.8 MW ], (ii) higher confinement [tau_E = 0.3 s, T_e(0) = 1.1 keV at <n_e> = 6.5 x 10^19 m^-3 and P_abs = 2.0 MW] and (iii) higher stored energy W_p^dia = 880 kJ. High performance plasmas have been realized in the inward shifted magnetic axis configuration (R=3 .6m) where the helical symmetry is recovered and the particle orbit properties are improved by trade off of MHD stability properties due to the appearance of the magnetic hill. The energy confinement was systematically higher than that predicted by the Intemational Stellerator Scaling 95 up to a factor of I .6 and was comparable with ELMy H-mode confinement capability in tokamaks. This confinement improvement is attributed to the configuration control (the inward shift of magnetic axis) and to the formation of the high edge temperature. The achieved average beta value reached 2.4 % at B=1.3 T, the highest beta value ever obtained in helical devices, and so far no degradation of confinement by MHD phenomenon is observed. The inward shifted configuration has also led to successful ICRF minority ion heating.  ICRF power up to 1.3 MW was reliably injected into the plasma without significant impurity contamination and a plasma with a stored energy of 200 kJ was sustained for 5 sec by ICRF alone. As another important result long pulse discharges of more than I minute were successfully achieved separately with NBI heating of 0.5 MW and with ICRF heating of 0.85 MW."},
 title = {Overview of LHD Experiments},
 year = {2000}
}