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-mode plasmas in JT-60U tokamakUrano, Hajime; Takizuka, Tomonori; Takenaga, Hidenobu; Oyama, Naoyuki; Miura, Yukitoshi; Kamada, Yutaka
Nuclear Fusion, 46(8), p.781 - 787, 2006/08
Times Cited Count：23 Percentile：58.7(Physics, Fluids & Plasmas)The degradation of energy confinement with increased toroidal beta 
was shown by the non-dimensional analysis in JT-60U. The dependence of the energy confinement on was examined by both the JT-60U ELMy 
-mode confinement database and the dedicated experiment on a single scan while 
and 
were kept fixed as well as the other magnetic geometrical parameters. In both cases, the degradation of energy confinement with increasing was observed, satisfying the relation of 
. This dependence is a little weaker than that predicted by the IPB98(y,2) scaling. The fusion power production rate was estimated to increase in proportion to 
.
and collisionality approaching ITER conditionsCordey, J. G.*; Thomsen, K.*; Chudnovskiy, A.*; Kardaun, O. J. W. F.*; Takizuka, Tomonori; Snipes, J. A.*; Greenwald, M.*; Sugiyama, L.*; Ryter, F.*; Kus, A.*; et al.
Nuclear Fusion, 45(9), p.1078 - 1084, 2005/09
Times Cited Count：51 Percentile：82.28(Physics, Fluids & Plasmas)The condition of the latest version of the ELMy H-mode database has been re-examined. It is shown that there is bias in the ordinary least squares regression for some of the variables. To address these shortcomings three different techniques are employed: (a)principal component regression, (b)an error in variables technique and (c)the selection of a better conditioned dataset with fewer variables. Scalings in terms of the dimensionless physics valiables, as well as the standard set of engineering variables, are derived. The new scalings give a very similar performance for existing scalings for ITER at the standard beta, but a much improvement performance at higher beta.
Kallenbach, A.*; Asakura, Nobuyuki; Kirk, A.*; Korotkov, A.*; Mahdavi, M. A.*; Mossessian, D.*; Porter, G. D.*
Journal of Nuclear Materials, 337-339, p.381 - 385, 2005/03
Times Cited Count：66 Percentile：96.55(Materials Science, Multidisciplinary)Edge profile data for H-mode discharges in 6 tokamaks have been analysed with the main focus on the edge density profile as well as electron temperature and density gradient lengths and steep gradient zone widths. A uniform procedure of data treatment and assignment of the separatrix position via power balance allowed to put the multi-machine data on an even base. The machine size appears to be the leading parameter for the width of the steep edge transport barrier gradient zone, as well as for the temperature decay length at the separatrix. Effects associated with neutral penetration physics are visible in the edge density profile.
Kawashima, Hisato; Uehara, Kazuya; Nishino, Nobuhiro*; Kamiya, Kensaku; Tsuzuki, Kazuhiro; Bakhtiari, M.; Nagashima, Yoshihiko*; Ogawa, Hiroaki; Hoshino, Katsumichi; Suzuki, Sadaaki; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 80(11), p.907 - 908, 2004/11
A comparison of divertor heat load between ELMy and "High Recycling Steady" (HRS) H-mode was carried out by fast measurements of the two dimensional 
emission, and the divertor electron temperature and ion saturation current on JFT-2M. They brought an attractive feature of HRS H-mode that the heat load was reduced to the level on time average that for ELMy H-mode, being able to avoid the severe heat load during pulsed ELM event. It was also indicated that the HRS H-mode was dominated by an enhancement of particle transport, whereas both heat and particle transport increased abruptly at ELM event.
Mikkelsen, D. R.*; Shirai, Hiroshi; Urano, Hajime*; Takizuka, Tomonori; Kamada, Yutaka; Hatae, Takaki; Koide, Yoshihiko; Asakura, Nobuyuki; Fujita, Takaaki; Fukuda, Takeshi*; et al.
Nuclear Fusion, 43(1), p.30 - 39, 2003/01
Times Cited Count：29 Percentile：63.92(Physics, Fluids & Plasmas)The stiffness of thermal transport in ELMy H-modes is explained in a series of carefully chosen JT-60U plasmas, and measured temperature are compared with the predictions of several transport models. A heating power scan with constant Tped, a scan of pedestal temperature Tped with constant heating power, and an on/off-axis heating comparison are presented. Predictions of the RLWB and IFS/PPPL models generally agree with the measured temperature outside 
0.3
, but the Multimode model uniformly predicts temperatures that are too high except in the central region.
Fukuda, Takeshi; Oikawa, Toshihiro; Takeji, Satoru; Isayama, Akihiko; Kawano, Yasunori; Neyatani, Yuzuru; Nagashima, Akira; Nishitani, Takeo; Konoshima, Shigeru; Tamai, Hiroshi; et al.
Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.357 - 367, 2002/09
Times Cited Count：7 Percentile：44.29(Nuclear Science & Technology)no abstracts in English
Urano, Hajime; Kamada, Yutaka; Shirai, Hiroshi; Takizuka, Tomonori; Ide, Shunsuke; Fujita, Takaaki; Fukuda, Takeshi
Nuclear Fusion, 42(1), p.76 - 85, 2002/01
Times Cited Count：33 Percentile：69.79(Physics, Fluids & Plasmas)no abstracts in English
Itami, Kiyoshi; Tamai, Hiroshi; Sakurai, Shinji; Kubo, Hirotaka; Konoshima, Shigeru; Asakura, Nobuyuki
Purazuma, Kaku Yugo Gakkai-Shi, 77(10), p.1027 - 1034, 2001/10
no abstracts in English
Mikkelsen, D. R.*; Shirai, Hiroshi; Asakura, Nobuyuki; Fujita, Takaaki; Fukuda, Takeshi; Hatae, Takaki; Ide, Shunsuke; Isayama, Akihiko; Kamada, Yutaka; Kawano, Yasunori; et al.
IAEA-CN-77 (CD-ROM), 5 Pages, 2001/05
no abstracts in English
Ongena, J.*; Budny, R.*; Dumortier, P.*; Jackson, G. L.*; Kubo, Hirotaka; Messiaen, A. M.*; Murakami, Masanori*; Strachan, J. D.*; Sydora, R.*; Tokar, M.*; et al.
Physics of Plasmas, 8(5), p.2188 - 2198, 2001/05
Times Cited Count：49 Percentile：79.7(Physics, Fluids & Plasmas)no abstracts in English
Sakasai, Akira; Takenaga, Hidenobu; Kubo, Hirotaka; Akino, Noboru; Higashijima, Satoru; Sakurai, Shinji; Tamai, Hiroshi; Itami, Kiyoshi; Asakura, Nobuyuki
Journal of Nuclear Materials, 290-293, p.957 - 961, 2001/03
Times Cited Count：12 Percentile：64.65(Materials Science, Multidisciplinary)no abstracts in English
Sakasai, Akira; Takenaga, Hidenobu; Higashijima, Satoru; Kubo, Hirotaka; Nakano, Tomohide; Tamai, Hiroshi; Sakurai, Shinji; Akino, Noboru; Fujita, Takaaki; Asakura, Nobuyuki; et al.
IAEA-CN-77 (CD-ROM), 9 Pages, 2001/00
no abstracts in English
Urano, Hajime; Kamada, Yutaka; Kubo, Hirotaka; Sakurai, Shinji; Shirai, Hiroshi; Takizuka, Tomonori; Hatae, Takaki; Ide, Shunsuke; Fujita, Takaaki; Fukuda, Takeshi
Journal of Plasma and Fusion Research SERIES, Vol.4, p.239 - 242, 2001/00
no abstracts in English
Shirai, Hiroshi; Takizuka, Tomonori; Koide, Yoshihiko; Naito, Osamu; Sato, Masayasu; Kamada, Yutaka; Fukuda, Takeshi
Plasma Physics and Controlled Fusion, 42(11), p.1193 - 1217, 2000/11
Times Cited Count：56 Percentile：82.34(Physics, Fluids & Plasmas)no abstracts in English
Urano, Hajime; Kamada, Yutaka; Shirai, Hiroshi; Takizuka, Tomonori; Ide, Shunsuke; Fujita, Takaaki; Fukuda, Takeshi
JAERI-Research 2000-037, 38 Pages, 2000/10
JAERI-Research-2000-037.pdf:1.59MB
no abstracts in English
Urano, Hajime; Kamada, Yutaka; Shirai, Hiroshi; Takizuka, Tomonori; Ide, Shunsuke; Fujita, Takaaki; Fukuda, Takeshi
Proceedings of 27th European Physical Society Conference on Controlled Fusion and Plasma Physics, p.956 - 959, 2000/00
no abstracts in English
Takenaga, Hidenobu; Nagashima, Keisuke; Sakasai, Akira; Asakura, Nobuyuki; Shimizu, Katsuhiro; Kubo, Hirotaka; Higashijima, Satoru; Oikawa, Toshihiro; Shirai, Hiroshi; Fujita, Takaaki; et al.
Nuclear Fusion, 39(11Y), p.1917 - 1928, 1999/11
Times Cited Count：22 Percentile：57.65(Physics, Fluids & Plasmas)no abstracts in English
Sakasai, Akira; Takenaga, Hidenobu; Hosogane, Nobuyuki; Kubo, Hirotaka; Sakurai, Shinji; Akino, Noboru; Fujita, Takaaki; Higashijima, Satoru; Tamai, Hiroshi; Asakura, Nobuyuki; et al.
Fusion Energy 1998 (CD-ROM), 8 Pages, 1999/00
no abstracts in English
Itami, Kiyoshi; Hosogane, Nobuyuki; Konoshima, Shigeru; Sakurai, Shinji; Asakura, Nobuyuki; Higashijima, Satoru; Sakasai, Akira; Tamai, Hiroshi; Shimada, Michiya
Journal of Nuclear Materials, 266-269, p.1097 - 1102, 1999/00
Times Cited Count：14 Percentile：70.45(Materials Science, Multidisciplinary)no abstracts in English
Sakasai, Akira; Takenaga, Hidenobu; Hosogane, Nobuyuki; Sakurai, Shinji; Akino, Noboru; Kubo, Hirotaka; Higashijima, Satoru; Tamai, Hiroshi; Asakura, Nobuyuki; Itami, Kiyoshi; et al.
Journal of Nuclear Materials, 266-269, p.312 - 317, 1999/00
Times Cited Count：18 Percentile：77.22(Materials Science, Multidisciplinary)no abstracts in English
