@techreport{oai:nifs-repository.repo.nii.ac.jp:00009978,
 author = {Motojima,  O. and Ohyabu,  N. and Komori,  A. and Kaneko,  O. and Yamada,  H. and Kawahata,  K. and Nakamura,  Y. and Ida,  K. and Akiyama,  T. and Ashikawa,  N. and COOPER,  W. Anthony and Shoji,  M. and Suzuki,  H. and Takeiri,  Y. and Takeuchi,  N. and Tamura,  N. and Tanaka,  K. and Tanaka,  M. Y. and Teramachi,  Y. and Toi,  K. and Tokuzawa,  T. and Kubo,  H. and Tomota,  Y. and Torii,  Y. and Watanabe,  K. Y. and Watari,  T. and Xu,  Y. and Yamada,  I. and Yamamoto,  S. and Yamamoto,  T. and Yokoyama,  M. and Yoshimura,  S. and Kusama,  Y. and Yoshimura,  Y. and Yoshinuma,  M. and Asakura,  N. and Fujita,  T. and Fukuda,  T. and Hatae,  T. and Higashijima,  S. and Isayama,  A. and Kamada,  Y. and Tsumori,  K. and Miura,  Y. and Nakano,  T. and Ninomiya,  H. and Oikawa,  T. and Oyama,  N. and Sakamoto,  Y. and Shinohara,  K. and Suzuki,  T. and Ejiri,  A. and Takenaga,  H. and Ushigusa,  K. and Hino,  T. and Ichimura,  M. and Takase,  Y. and Sano,  F. and Zushi,  H. and Satow,  T. and Imagawa,  S. and Mito,  T. and Emoto,  M. and Ohtake,  I. and Uda,  T. and Itoh,  K. and Ohkubo,  K. and Sudo,  S. and Yamazaki,  K. and Matsuoka,  K. and Hamada,  Y. and Fujiwara,  M. and Ezumi,  N. and Funaba,  H. and Fukuyama,  A. and Goncharov,  P. and Goto,  M. and Idei,  H. and Ikeda,  K. and Inagaki,  S. and Isobe,  M. and Kado0,  S. and Kawazome,  H. and Khlopenkov,  K. and Kobuchi,  T. and Kondo,  K. and Kostrioukov,  A. and Kubo,  S. and Kumazawa,  R. and Liang,  Y. and Lyon,  J. F. and Mase,  A. and Masuzaki,  S. and Minami,  T. and Miyazawa,  J. and Morisaki,  T. and Morita,  S. and Murakami,  S. and Muto,  S. and Mutoh,  T. and Nagaoka,  K. and Nagayama,  Y. and Nakajima,  N. and Nakamura,  K. and Nakanishi,  H. and Narihara,  K. and Narushima,  Y. and Nishimura,  K. and Nishino,  N. and Noda,  N. and Notake,  T. and Nozato,  H. and Ohdachi,  S. and Oka,  Y. and Okada,  H. and Okamura,  S. and Osakabe,  M. and Ozaki,  T. and Peterson,  B. J. and Sagara,  A. and Saida,  T. and Saito,  K. and Sakakibara,  S. and Sakamoto,  M. and Sakamoto,  R. and Sasao,  M. and Sato,  K. and Sato,  M. and Seki,  T. and Shimozuma,  T.},
 month = {Oct},
 note = {In the first four years of LHD experiment, several encouraging results have emerged, the, most significant of which is that MHD stability and good transport are compatible in the inward shifted axis configuration. The observed energy confinement at this optimal configuration is consistent with ISS95 scaling with an enhancement factor of 1.5. The confinement enhancement over the smaller heliotron devices is attributed to the high edge temperature. We find that plasma with an average beta of 3 % is stable in this configuration even though the theoretical stability conditions of Mercier modes and pressure driven low n modes are violated. In the low density discharges heated by NBI and ECR heatings, ITB(internal transport barrier) and an associated high central temperature (> 10 keV) are seen. The radial electric field measured in these discharges is positive (electron root) and expected to play a key role in the formation of the ITB. The positive electric field is also found to suppress the ion thermal diffusivity as predicted by neoclassical transport theory The width of the externally imposed island (n/m=1/1) is found to decrease when the plasma is collisionless with finite beta and it increases when the plasma is collisional. The ICRF heating in LHD is successful and a high energy tail ( up to 500keV) has been detected for minority ion heating, demonstrating good confinement of the high energy particles. The magnetic field line structure unique to the heliotron edge configuration is confirmed by measuring the plasma density and temperature profiles on the divertor plate. A long pulse (2minute) discharge, with an ICRF power of 0.4 MW has been demonstrated and energy confinement characteristics are almost the same as those in short pulse discharges.},
 title = {Recent Advance in LHD Experiment},
 year = {2002}
}