@article{oai:nifs-repository.repo.nii.ac.jp:00000300,
 author = {KANEKO,  Osamu and YOKOYAMA,  Masayuki and YOSHINUMA,  Mikiro and NAGAOKA,  Ken-ichi and IDA,  Katsumi and SAKAMOTO,  Ryuichi and AKIYAMA,  Tsuyoshi and ASHIKAWA,  Naoko and CHIKARAISHI,  Hirotaka and EMOTO,  Masahiko and FUNABA,  Hisamichi and GONCHAROV,  Pavel and GOTO,  Motoshi and GOTO,  Takuya and HAMAGUCHI,  Shinji and ICHIGUCHI,  Katsuji and IDO,  Takeshi and IGAMI,  Hiroe and IKEDA,  Katsunori and IMAGAWA,  Shinsaku and ISOBE,  Mitsutaka and ITOH,  Kimitaka and IWAMOTO,  Akifumi and KANNO,  Ryutaro and KASAHARA,  Hiroshi and KASUYA,  Naohiro and KATO,  Daiji and KAWAHATA,  Kazuo and KOBAYASHI,  Masahiro and KUBO,  Shin and KUMAZAWA,  Ryuhei and MAEKAWA,  Ryuji and MASUZAKI,  Suguru and MITO,  Toshiyuki and MIYAZAWA,  Jun-ichi and MIZUGUCHI,  Naoki and MORISAKI,  Tomohiro and MORITA,  Shigeru and MOTOJIMA,  Gen and MUTO,  Sadatsugu and MUTOH,  Takashi and NAGAYAMA,  Yoshio and NAKAJIMA,  Noriyoshi and NAKAMURA,  Yukio and NAKANISHI,  Hideya and NARIHARA,  Kazumichi and NARUSHIMA,  Yoshiro and NISHIMURA,  Kiyohiko and NISHIURA,  Masaki and OBANA,  Tetsuhiro and OHDACHI,  Satoshi and OHYABU,  Nobuyoshi and OSAKABE,  Masaki and OZAKI,  Tetsuo and PETERSON,  Byron J. and SAGARA,  Akio and SAITO,  Kenji and SAKAKIBARA,  Satoru and SATAKE,  Shinsuke and SATO,  Kuninori and SEKI,  Tetsuo and SHIMIZU,  Akihiro and SHIMOZUMA,  Takashi and SHOJI,  Mamoru and SUDO,  Shigeru and SUGAMA,  Hideo and SUZUKI,  Chihiro and SUZUKI,  Yasuhiro and TAKAHASHI,  Hiromi and TAKAHATA,  Kazuya and TAKEIRI,  Yasuhiko and TAMURA,  Hitoshi and TAMURA,  Naoki and TANAKA,  Kenji and TODA,  Shinichiro and TOI,  Kazuo and TOKITANI,  Masayuki and TOKUZAWA,  Tokihiko and TSUMORI,  Katsuyoshi and WATANABE,  Kiyomasa and YAMADA,  Ichihiro and YAMADA,  Hiroshi and YAMAGISHI,  Osamu and YANAGI,  Nagato and YOSHIMURA,  Shinji and YOSHIMURA,  Yasuo and KOMORI,  Akio},
 journal = {Plasma and Fusion Research},
 month = {Jan},
 note = {Recent two major topics of Large Helical Device (LHD) towards fusion relevant conditions, high-density operation and high-ion-temperature operation, are reported. Super dense core plasma was obtained by the combination of repetitive hydrogen ice pellet injection and high power neutral beam injection (NBI) heating. A very peaked density profile with the highest central density of 1.1 × 1021 m-3 was produced showing that the particle transport was suppressed very well in the plasma core. The spatial density profile varies as the position of magnetic axis (Rax), and the steepest profile is obtained at Rax  = 3.95 m. The highest central ion temperature of 5.6 keV was obtained in hydrogen plasma at electron density of 1.6 × 1019 m-3  by NBI, where a peaked ion-temperature profile with internal ion energy transport barrier was observed. The profile of electron temperature did not change much and was broad even when the ion temperature had a peaked profile. The central ion temperature is higher than the electron temperature, which is a new operation regime of LHD. High central ion temperature accompanied strong toroidal rotation and an extreme hollow profile of carbon ions (impurity hole). These steep temperature profiles were obtained so far at around Rax  = 3.6 m. The compatibility between particle and energy confinement is a new issue of LHD to explore a new operation regime for attractive fusion reactor.},
 title = {Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma},
 volume = {Vol.4},
 year = {2009}
}