@techreport{oai:nifs-repository.repo.nii.ac.jp:00010006,
 author = {"Mutoh,  T. and Kumazawa,  R. and Seki,  T. and Saito,  K. and Watari,  T. and Torii,  Y. and Takeuchi,  N. and Yamamoto,  T. and Osakabe,  M. and Sasao,  M. and Murakami,  S. and Ozaki,  T. and Saida,  T. and Zhao,  Y. P. and Okada,  H. and Takase,  Y. and Fukuyama,  A. and Ashikawa,  N. and Emoto,  M. and Funaba,  H. and Goncharov,  P. and Goto,  M. and Ida,  K. and Idei,  H. and Ikeda,  K. and Inagaki,  S. and Isobe,  M. and Kaneko,  O. and Kawahata,  K. and Khlopenkov,  K. and Kobuchi,  T. and Komori,  A. and Kostrioukov,  A. and Kubo,  S. and Liang,  Y. and Masuzaki,  S. and Minami,  T. and Mito,  T. and Miyazawa,  J. and Morisaki,  T. and Morita,  S. and Muto,  S. and Nagayama,  Y. and Nakamura,  Y. and Nakanishi,  H. and Narihara,  K. and Narushima,  Y. and Nishimura,  K. and Noda,  N. and Notake,  T. and Ohdachi,  S. and Ohtake,  I. and Ohyabu,  N. and Oka,  Y. and Peterson,  B. J. and Sagara,  A. and Sakakibara,  S. and Sakamoto,  R. and Sasao,  M. and Sato,  K. and Sato,  M. and Shimozuma,  T. and Shoji,  M. and Suzuki,  H. and Takeiri,  Y. and Tamura,  N. and Tanaka,  K. and Toi,  K. and Tokuzawa,  T. and Tsumori,  K. and Watanabe,  K. Y. and Xu,  Y. and Yamada,  H. and Yamada,  I. and Yamamoto,  S. and Yokoyama,  M. and Yoshimura,  Y. and Yoshinuma,  M. and Itoh,  K. and Ohkubo,  K. and Satow,  T. and Sudo,  S. and Uda,  T. and Yamazaki,  K. and Matsuoka,  K. and Motojima,  O. and Hamada,  Y. and Fujiwara,  M."},
 month = {Oct},
 note = {"Significant progress has been made with lon-Cyclotron Range-of-Frequencies (lCRF) heating in the Large Helical Device (LHD). This is mainly due to better confinement of the helically trapped particles, and less accumulation of impurities in the region of the plasma core. During the past two years, ICRF heating power has been increased from 1.35 MW to 2.7 MW. Various wave-mode tests were carried out using minority-ion heating, second-harmonic heating, slow-wave heating, and high-density fast-wave heating at the fundamental cyclotron frequency.  This fundamental heating mode extended the plasma-density range of effective ICRF heating to a value of 1 x 10^20 m^-3.  This was the first successful result of this geating mode in large fusion devices.  Using the minority-ion mode gave the best performance, and the stored energy reached 240 kJ using ICRF alone. This was obtained for the inward-shifted magnetic axis configuration. The improvement associated with the axis shift was common to both bulk plasma and highly accelerated particles. For the minority-ion mode, high-energy ions up to 500 keV were observed by concentrating the heating power near the plasma axis. The confinement properties of high-energy particles were studied for different magnetic axis configurations using the power-modulation technique. It confirmed that the confimement of high-energy particles with the inward-shifted configuration was better than that with the normal configuration. The impurity problem was not serious when the plasma boundary was sufficiently far from the chamber wal1. By reducing the impurity problem, it was possible to sustain the plasma for more than two minutes using ICRF alone."},
 title = {ICRF Heating and High Energy Particle Production in the Large Helical Device},
 year = {2002}
}