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Ida, Katsumi*; Sakamoto, Yoshiteru; Yoshinuma, Mikiro*; Takenaga, Hidenobu; Nagaoka, Kenichi*; Hayashi, Nobuhiko; Oyama, Naoyuki; Osakabe, Masaki*; Yokoyama, Masayuki*; Funaba, Hisamichi*; et al.
Nuclear Fusion, 49(9), p.095024_1 - 095024_9, 2009/09
Times Cited Count：29 Percentile：72.01(Physics, Fluids & Plasmas)Dynamics of ion internal transport barrier (ITB) formation and impurity transport both in the Large Helical Device (LHD) heliotron and JT-60U tokamak are described. Significant differences between heliotron and tokamak plasmas are observed. The location of the ITB moves outward during the ITB formation regardless of the sign of magnetic shear in JT-60U and the ITB becomes more localized in the plasma with negative magnetic shear. In LHD, the low Te/Ti ratio (
1) of the target plasma for the high power heating is found to be necessary condition to achieve the ITB plasma and the ITB location tends to expand outward or inward depending on the condition of the target plasmas. Associated with the formation of ITB, the carbon density tends to be peaked due to inward convection in JT-60U, while the carbon density becomes hollow due to outward convection in LHD. The outward convection observed in LHD contradicts the prediction by neoclassical theory.
Motojima, Osamu*; Yamada, Hiroshi*; Komori, Akio*; Oyabu, Nobuyoshi*; Muto, Takashi*; Kaneko, Osamu*; Kawahata, Kazuo*; Mito, Toshiyuki*; Ida, Katsumi*; Imagawa, Shinsaku*; et al.
Nuclear Fusion, 47(10), p.S668 - S676, 2007/10
Times Cited Count：34 Percentile：73.71(Physics, Fluids & Plasmas)The performance of net-current free heliotron plasmas has been developed by findings of innovative operational scenarios in conjunction with an upgrade of the heating power and the pumping/fuelling capability in the Large Helical Device (LHD). Consequently, the operational regime has been extended, in particular, with regard to high density, long pulse length and high beta. Diversified studies in LHD have elucidated the advantages of net-current free heliotron plasmas. In particular, an internal diffusion barrier (IDB) by a combination of efficient pumping of the local island divertor function and core fuelling by pellet injection has realized a super dense core as high as 5
10
m
, which stimulates an attractive super dense core reactor. Achievements of a volume averaged beta of 4.5% and a discharge duration of 54 min with a total input energy of 1.6 GJ (490 kW on average) are also highlighted. The progress of LHD experiments in these two years is overviewed by highlighting IDB, high-beta and long pulse.
Motojima, Osamu*; Yamada, Hiroshi*; Komori, Akio*; Oyabu, Nobuyoshi*; Kaneko, Osamu*; Kawahata, Kazuo*; Mito, Toshiyuki*; Muto, Takashi*; Ida, Katsumi*; Imagawa, Shinsaku*; et al.
Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM), 12 Pages, 2007/03
The performance of net-current free Heliotron plasmas has been developed by findings of innovative operational scenarios in conjunction with an upgrade of the heating power and the pumping/fueling capability in the Large Helical Device (LHD). Consequently, the operational regime has been extended, in particular, with regard to high density, long pulse length and high beta. Diversified studies in LHD have elucidated the advantages of net-current free heliotron plasmas. In particular, an Internal Diffusion Barrier (IDB) by combination of efficient pumping of the local island divertor function and core fueling by pellet injection has realized a super dense core as high as 510m, which stimulates an attractive super dense core reactor. Achievements of a volume averaged beta of 4.5 % and a discharge duration of 54-min. with a total input energy of 1.6 GJ (490 kW in average) are also highlighted. The progress of LHD experiments in these two years is overviewed with highlighting IDB, high 
and long pulse.
Asakura, Nobuyuki; Kato, Takako*; Nakano, Tomohide; Takamura, Shuichi*; Tanabe, Tetsuo*; Iio, Shunji*; Nakajima, Noriyoshi*; Ono, Yasushi*; Ozeki, Takahisa; Takechi, Manabu; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 82(7), p.448 - 450, 2006/07
no abstracts in English
Sakamoto, Yoshiteru; Toi, Kazuo*; Fukuda, Takeshi*; Fukuyama, Atsushi*; Fujita, Takaaki; Ogawa, Yuichi*; Takizuka, Tomonori; Takenaga, Hidenobu; Yagi, Masatoshi*; Yamada, Hiroshi*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 82(2), p.109 - 110, 2006/02
no abstracts in English
Sakamoto, Yoshiteru; Toi, Kazuo*; Fukuda, Takeshi*; Fukuyama, Atsushi*; Fujita, Takaaki; Ogawa, Yuichi*; Takizuka, Tomonori; Takenaga, Hidenobu; Yagi, Masatoshi*; Yamada, Hiroshi*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 81(8), p.626 - 627, 2005/08
no abstracts in English
Kawano, Yasunori; Kawahata, Kazuo*; Kusama, Yoshinori; Sasao, Mamiko*; Sugie, Tatsuo; Mase, Atsushi*; Asakura, Nobuyuki; Kato, Takako*; Takamura, Shuichi*; Tanabe, Tetsuo*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 81(2), p.128 - 130, 2005/02
no abstracts in English
Mori, Hidenobu; Hirao, Toshio; Laird, J. S.; Onoda, Shinobu; Ito, Hisayoshi
JAERI-Review 2002-035, TIARA Annual Report 2001, p.14 - 16, 2002/11
no abstracts in English
Onoda, Shinobu; Hirao, Toshio; Laird, J. S.; Mori, Hidenobu; Abe, Hiroshi; Ito, Hisayoshi
JAERI-Review 2002-035, TIARA Annual Report 2001, p.3 - 4, 2002/11
no abstracts in English
Matsuda, Hideo*; Omura, Ichiro*; Sakiyama, Yoko*; Urano, Satoshi*; Iesaka, Susumu*; Ohashi, Hiromichi*; Hirao, Toshio; Abe, Hiroshi; Ito, Hisayoshi; Mori, Hidenobu; et al.
JAERI-Review 2002-035, TIARA Annual Report 2001, p.11 - 13, 2002/11
no abstracts in English
Hirao, Toshio; Laird, J. S.; Mori, Hidenobu; Onoda, Shinobu; Wakasa, Takeshi; Yamakawa, Takeshi; Abe, Hiroshi; Ito, Hisayoshi
Proceedings of 5th International Workshop on Radiation Effects on Semiconductor Devices for Space Applications, p.161 - 166, 2002/10
no abstracts in English
Laird, J. S.; Hirao, Toshio; Onoda, Shinobu*; Mori, Hidenobu*; Ito, Hisayoshi
Proceedings of 5th International Workshop on Radiation Effects on Semiconductor Devices for Space Applications, p.155 - 160, 2002/10
no abstracts in English
Kamada, Yutaka; Fujita, Takaaki; Ishida, Shinichi; Kikuchi, Mitsuru; Ide, Shunsuke; Takizuka, Tomonori; Shirai, Hiroshi; Koide, Yoshihiko; Fukuda, Takeshi; Hosogane, Nobuyuki; et al.
Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.185 - 254, 2002/09
Times Cited Count：34 Percentile：48.48(Nuclear Science & Technology)With the main aim of providing physics basis for ITER and the steady-state tokamak reactors, JT-60/JT-60U has been developing and optimizing the operational concepts, and extending the discharge regimes toward sustainment of high integrated performance in the reactor relevant parameter regime. In addition to achievement of the equivalent break-even condition (QDTeq up to 1.25) and a high fusion triple product = 1.5E21 m-3skeV, JT-60U has demonstrated the integrated performance of high confinement, high beta-N, full non-inductive current drive with a large fraction of bootstrap current in the reversed magnetic shear and in the high-beta-p ELMy H mode plasmas characterized by both internal and edge transport barriers. The key factors in optimizing these plasmas are profile and shape controls. As represented by discovery of various Internal Transport Barriers, JT-60/JT-60U has been emphasizing freedom and restriction of profiles in various confinement modes. JT-60U has demonstrated applicability of these high confinement modes to ITER and also clarified remaining issues.
Mori, Hidenobu*; Hirao, Toshio; Laird, J. S.; Onoda, Shinobu*; Lee, K. K.; Abe, Hiroshi; Ito, Hisayoshi; Okamoto, Tsuyoshi*; Koizumi, Yoshiharu*
JNC TN7200 2001-001, p.55 - 57, 2002/01
no abstracts in English
Hirao, Toshio; Laird, J. S.; Mori, Hidenobu; Onoda, Shinobu; Ito, Hisayoshi
Proceedings of 6th European Conference on Radiation and its Effects on Components and System (RADECS 2001) (CD-ROM), 5 Pages, 2002/00
no abstracts in English
Laird, J. S.; Hirao, Toshio; Onoda, Shinobu; Mori, Hidenobu; Ito, Hisayoshi
Proceedings of 6th European Conference on Radiation and its Effects on Components and System (RADECS 2001) (CD-ROM), 7 Pages, 2002/00
no abstracts in English
and electron irradiation pin photodiodeOnoda, Shinobu; Hirao, Toshio; Laird, J. S.; Mori, Hidenobu; Okamoto, Tsuyoshi*; Koizumi, Yoshiharu*; Ito, Hisayoshi
Proceedings of 6th European Conference on Radiation and its Effects on Components and System (RADECS 2001) (CD-ROM), 5 Pages, 2002/00
no abstracts in English
Laird, J. S.; Hirao, Toshio; Mori, Hidenobu*; Onoda, Shinobu*; Kamiya, Tomihiro; Ito, Hisayoshi
Nuclear Instruments and Methods in Physics Research B, 181(1-4), p.87 - 94, 2001/07
Times Cited Count：65 Percentile：96.69(Instruments & Instrumentation)no abstracts in English
Hirao, Toshio; Laird, J. S.; Mori, Hidenobu*; Onoda, Shinobu*; Ito, Hisayoshi
Solid State Phenomena Vol.78-79, p.395 - 400, 2001/07
no abstracts in English
Laird, J. S.; Hirao, Toshio; Onoda, Shinobu*; Mori, Hidenobu*; Ito, Hisayoshi
Solid State Phenomena Vol.78-79, p.401 - 406, 2001/07
no abstracts in English
