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Journal Articles

Quantitative measurements of element distributions using the neutron-transmission resonance-absorption method

Harada, Masahide; Parker, J. D.*; Sawano, Tatsuya*; Kubo, Hidetoshi*; Tanimori, Toru*; Shinohara, Takenao; Maekawa, Fujio; Sakai, Kenji

Physics Procedia, 43, p.314 - 322, 2013/00

 Times Cited Count:1 Percentile:56.8

The purposes of this study are to perform Neutron Resonance Absorption NRA test experiments using the Micro Pixel Chamber, and to confirm its quantitativity. The detector was located at 14.5 m from the moderator in the experimental room of NOBORU. The samples, consisting of thin Tantalum (Ta) foils, with thicknesses of 5, 10, 20 and 100 $$mu$$m, were placed individually at 15 cm upstream from the detector. In the experiment, the transmission spectra with the Ta samples and no sample were obtained. Background components were not so small in these measurements. From the neutron transport simulation, it was surmised that the origin of this background was due to scattering of neutrons in the experimental room. Therefore, the assumed background components were subtracted from the measurement data. Finally, it was found that the difference between the measurement data and the nuclear data was within about 7%.

Journal Articles

Overview of national centralized tokamak program; Mission, design and strategy to contribute ITER and DEMO

Ninomiya, Hiromasa; Akiba, Masato; Fujii, Tsuneyuki; Fujita, Takaaki; Fujiwara, Masami*; Hamamatsu, Kiyotaka; Hayashi, Nobuhiko; Hosogane, Nobuyuki; Ikeda, Yoshitaka; Inoue, Nobuyuki; et al.

Journal of the Korean Physical Society, 49, p.S428 - S432, 2006/12

To contribute DEMO and ITER, the design to modify the present JT-60U into superconducting coil machine, named National Centralized Tokamak (NCT), is being progressed under nationwide collaborations in Japan. Mission, design and strategy of this NCT program is summarized.

Journal Articles

Overview of the national centralized tokamak programme

Kikuchi, Mitsuru; Tamai, Hiroshi; Matsukawa, Makoto; Fujita, Takaaki; Takase, Yuichi*; Sakurai, Shinji; Kizu, Kaname; Tsuchiya, Katsuhiko; Kurita, Genichi; Morioka, Atsuhiko; et al.

Nuclear Fusion, 46(3), p.S29 - S38, 2006/03

 Times Cited Count:13 Percentile:44.28(Physics, Fluids & Plasmas)

The National Centralized Tokamak (NCT) facility program is a domestic research program for advanced tokamak research to succeed JT-60U incorporating Japanese university accomplishments. The mission of NCT is to establish high beta steady-state operation for DEMO and to contribute to ITER. The machine flexibility and mobility is pursued in aspect ratio and shape controllability, feedback control of resistive wall modes, wide current and pressure profile control capability for the demonstration of the high-b steady state.

Journal Articles

Engineering design and control scenario for steady-state high-beta operation in national centralized tokamak

Tsuchiya, Katsuhiko; Akiba, Masato; Azechi, Hiroshi*; Fujii, Tsuneyuki; Fujita, Takaaki; Fujiwara, Masami*; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; et al.

Fusion Engineering and Design, 81(8-14), p.1599 - 1605, 2006/02

 Times Cited Count:1 Percentile:10.64(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Experimental and theoretical elastic cross sections for electron collisions with the C$$_{3}$$H$$_{6}$$ isomers

Makochekanwa, C.*; Kato, Hidetoshi*; Hoshino, Masamitsu*; Tanaka, Hiroshi*; Kubo, Hirotaka; Bettega, M. H. F.*; Lopes, A. R.*; Lima, M. A. P.*; Ferreira, L. G.*

Journal of Chemical Physics, 124(2), p.024323_1 - 024323_9, 2006/00

 Times Cited Count:15 Percentile:48.16(Chemistry, Physical)

no abstracts in English

Journal Articles

Design study of national centralized tokamak facility for the demonstration of steady state high-$$beta$$ plasma operation

Tamai, Hiroshi; Akiba, Masato; Azechi, Hiroshi*; Fujita, Takaaki; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; Hosogane, Nobuyuki; Ichimura, Makoto*; et al.

Nuclear Fusion, 45(12), p.1676 - 1683, 2005/12

 Times Cited Count:15 Percentile:48.09(Physics, Fluids & Plasmas)

Design studies are shown on the National Centralized Tokamak facility. The machine design is carried out to investigate the capability for the flexibility in aspect ratio and shape controllability for the demonstration of the high-beta steady state operation with nation-wide collaboration, in parallel with ITER towards DEMO. Two designs are proposed and assessed with respect to the physics requirements such as confinement, stability, current drive, divertor, and energetic particle confinement. The operation range in the aspect ratio and the plasma shape is widely enhanced in consistent with the sufficient divertor pumping. Evaluations of the plasma performance towards the determination of machine design are presented.

Journal Articles

Sequence analysis of the gliding protein Gli349 in ${it Mycoplasma mobile}$

Metsugi. Shoichi; Uenoyama, Atsuko*; Kubo, Jun*; Miyata, Makoto*; Yura, Kei; Kono, Hidetoshi; Go, Nobuhiro

Biophysics, 1, p.33 - 43, 2005/05

The motile mechanism of Mycoplasma mobile remains unknown but is believed to differ from any previously identified mechanism in bacteria. Gli349 of M. mobile is known to be responsible for both adhesion to glass surfaces and mobility. We therefore carried out sequence analyses of Gli349 and its homolog MYPU2110 from M. pulmonis to decipher their structures. We found that the motif "YxxxxxGF" appears 11 times in Gli349 and 16 times in MYPU2110. Further analysis of the sequences revealed that Gli349 contains 18 repeats of about 100 amino acid residues each, and MYPU2110 contains 22. No sequence homologous to any of the repeats was found in the NCBI RefSeq non-redundant sequence database, and no compatible fold structure was found among known protein structures, suggesting that the repeat found in Gli349 and MYPU2110 is novel and takes a new fold structure. Proteolysis of Gli349 using chymotrypsin revealed that cleavage positions were often located between the repeats, implying that regions connecting repeats are unstructured, flexible and exposed to the solvent.

Journal Articles

Irradiation test for verification of PWR 48GWd/t high burnup fuel

Okubo, Tadatsune*; Tsukuda, Yoshiaki*; Kamimura, Katsuichiro*; Murai, Kenji*; Goto, Ken*; Doi, Soichi*; Senda, Yasuhide*; Kosaka, Yuji*; Kido, Toshiya*; Murata, Tamotsu*; et al.

Nihon Genshiryoku Gakkai-Shi, 43(9), p.906 - 915, 2001/09

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Improvement of confinement and remote radiative cooling of beam heated plasmas in JT-60 with ion ▽B drift towards the X-point

Tsuji, Shunji; Hosogane, Nobuyuki; Itami, Kiyoshi; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Koide, Yoshihiko; *; Sugie, Tatsuo; Nagashima, Keisuke; et al.

Nuclear Fusion, 32(8), p.1313 - 1330, 1992/00

 Times Cited Count:7 Percentile:33.61(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Improved divertor confinement observed in JT-60

Tsuji, Shunji; Hosogane, Nobuyuki; Itami, Kiyoshi; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Koide, Yoshihiko; *; Sugie, Tatsuo; Nagashima, Keisuke; et al.

JAERI-M 91-195, 47 Pages, 1991/11

JAERI-M-91-195.pdf:1.31MB

no abstracts in English

Journal Articles

Helium ash exhaust studies with core fueling by a helium beam; L-mode divertor discharges with neutral-beam heating in the JT-60 tokamak

Nakamura, Hiroo; Hirayama, Toshio; Koide, Yoshihiko; Tobita, Kenji; Tani, Keiji; Fukuda, Takeshi; Kubo, Hirotaka; Kuriyama, Masaaki; Kusama, Yoshinori; Sakasai, Akira; et al.

Physical Review Letters, 67(19), p.2658 - 2661, 1991/11

 Times Cited Count:32 Percentile:82.66(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Improved divertor confinement and divertor characteristics

Tsuji, Shunji; Nakamura, Hiroo; Yoshida, Hidetoshi; Shimada, Michiya; Itami, Kiyoshi; Nishitani, Takeo; Kubo, Hirotaka; Fukuda, Takeshi; Sugie, Tatsuo; Shimizu, Katsuhiro; et al.

Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.243 - 260, 1991/03

no abstracts in English

Journal Articles

Particle confinement characteristics and helium ash exhaust experiments in JT-60 tokamak

Nakamura, Hiroo; Tsuji, Shunji; Shimizu, Katsuhiro; Hirayama, Toshio; Hosogane, Nobuyuki; Yoshida, Hidetoshi; Tobita, Kenji; Koide, Yoshihiko; Nishitani, Takeo; Nagashima, Keisuke; et al.

Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.261 - 285, 1991/03

no abstracts in English

Journal Articles

Impurity behavior

Sugie, Tatsuo; Kubo, Hirotaka; Sakasai, Akira; Koide, Yoshihiko; Hirayama, Toshio; Shimada, Michiya; Itami, Kiyoshi; Kawano, Yasunori; Nishitani, Takeo; Nagashima, Keisuke; et al.

Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.287 - 306, 1991/03

no abstracts in English

Journal Articles

Radiation losses and global power balance of JT-60 plasmas

Nishitani, Takeo; Itami, Kiyoshi; Nagashima, Keisuke; Tsuji, Shunji; Hosogane, Nobuyuki; Yoshida, Hidetoshi; Ando, Toshiro; Kubo, Hirotaka; Takeuchi, Hiroshi

Nuclear Fusion, 30(6), p.1095 - 1105, 1990/06

 Times Cited Count:16 Percentile:54.79(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Observation of limiter H mode in the JT-60 tokamak with lower hybrid current drive

Tsuji, Shunji; Ushigusa, Kenkichi; Ikeda, Yoshitaka; Imai, Tsuyoshi; Itami, Kiyoshi; Nemoto, Masahiro; Nagashima, Keisuke; Koide, Yoshihiko; Kawano, Yasunori; Fukuda, Takeshi; et al.

Physical Review Letters, 64(9), p.1023 - 1026, 1990/02

 Times Cited Count:54 Percentile:88.46(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Lower hybrid current drive efficiency in the JT-60 tokamak

Ushigusa, Kenkichi; Imai, Tsuyoshi; Ikeda, Yoshitaka; Naito, Osamu; Uehara, Kazuya; Yoshida, Hidetoshi; Kubo, Hirotaka; JT-60 Team

Nuclear Fusion, 29(6), p.1052 - 1055, 1989/06

 Times Cited Count:32 Percentile:80.41(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Simultaneous heating by high power lower hybrid waves and neutral beams in the JT-60 tokamak

Ushigusa, Kenkichi; Imai, Tsuyoshi; Ikeda, Yoshitaka; Sakamoto, Keishi; F.X.Soeldner*; *; Tsuji, Shunji; Shimizu, Katsuhiro; Naito, Osamu; Uehara, Kazuya; et al.

Nuclear Fusion, 29(2), p.265 - 276, 1989/02

 Times Cited Count:16 Percentile:58.11(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Lower hybrid wave heating into neutral beam heated plasma in the JT-60 tokamak

Ushigusa, Kenkichi; Imai, Tsuyoshi; Ikeda, Yoshitaka; Sakamoto, Keishi; F.X.Soldner*; *; Tsuji, Shunji; Shimizu, Katsuhiro; Naito, Osamu; Uehara, Kazuya; et al.

JAERI-M 88-115, 28 Pages, 1988/06

JAERI-M-88-115.pdf:0.87MB

no abstracts in English

Journal Articles

Energy confinement analysis of neutral beam heated JT-60 discharges

Yoshida, Hidetoshi; Shimizu, Katsuhiro; Shirai, Hiroshi; Tobita, Kenji; Kusama, Yoshinori; Kubo, Hirotaka; Koide, Yoshihiko; Sakasai, Akira; Fukuda, Takeshi; Nagashima, Keisuke; et al.

15th European Conf. on Controlled Fusion and Plasma Heating, Vol. 12, Pt. 1, p.163 - 166, 1988/00

no abstracts in English

31 (Records 1-20 displayed on this page)