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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:43.27(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:10.41(Nuclear Science & Technology)

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:47.33(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

Progress in physics and technology developments for the modification of JT-60

Tamai, Hiroshi; Matsukawa, Makoto; Kurita, Genichi; Hayashi, Nobuhiko; Urata, Kazuhiro*; Miura, Yushi; Kizu, Kaname; Tsuchiya, Katsuhiko; Morioka, Atsuhiko; Kudo, Yusuke; et al.

Plasma Science and Technology, 6(1), p.2141 - 2150, 2004/02

 Times Cited Count:2 Percentile:6.67(Physics, Fluids & Plasmas)

The dominant issue for the the modification program of JT-60 (JT-60SC) is to demonstrate the steady state reactor relevant plasma operation. Physics design on plasma parameters, operation scenarios, and the plasma control method are investigated for the achievement of high-$$beta$$. Engineering design and the R&D on the superconducting magnet coils, radiation shield, and vacuum vessel are performed. Recent progress in such physics and technology developments is presented.

Journal Articles

Objectives and design of the JT-60 superconducting tokamak

Ishida, Shinichi; Abe, Katsunori*; Ando, Akira*; Chujo, T.*; Fujii, Tsuneyuki; Fujita, Takaaki; Goto, Seiichi*; Hanada, Kazuaki*; Hatayama, Akiyoshi*; Hino, Tomoaki*; et al.

Nuclear Fusion, 43(7), p.606 - 613, 2003/07

no abstracts in English

Journal Articles

Objectives and design of the JT-60 superconducting tokamak

Ishida, Shinichi; Abe, Katsunori*; Ando, Akira*; Cho, T.*; Fujii, Tsuneyuki; Fujita, Takaaki; Goto, Seiichi*; Hanada, Kazuaki*; Hatayama, Akiyoshi*; Hino, Tomoaki*; et al.

Nuclear Fusion, 43(7), p.606 - 613, 2003/07

 Times Cited Count:33 Percentile:70.69(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Research activities on Tokamaks in Japan; JT-60U, JFT-2M and TRIAM-1M

Ninomiya, Hiromasa; Kitsunezaki, Akio; Shimizu, Masatsugu; Kuriyama, Masaaki; JT-60 Team; Kimura, Haruyuki; Kawashima, Hisato; Tsuzuki, Kazuhiro; Sato, Masayasu; Isei, Nobuaki; et al.

Fusion Science and Technology, 42(1), p.7 - 31, 2002/07

 Times Cited Count:12 Percentile:27.27(Nuclear Science & Technology)

In order to establish scientific basis for the sustainment of highly integrated performance required in the advanced steady-state operation, JT-60U has been optimizing the discharge control scenarios of improved confinement plasmas and expanding the operation regions. Promising results toward the steady-state tokamak were obtained. The detail of such results is reported. JFT-2M has performed advanced and basic research for the development of high performance tokamak plasma as well as the structural material for a fusion reactor. The toroidal ripple reduction with ferritic steel plates outside the vacuum vessel was successfully demonstrated. No adverse effects were observed in the pre-testing on compatibility between ferritic steel plates, covering ~20% of the inside wall of the vacuum vessel, and plasma. The results of TRIAM-1M is also reported.

Journal Articles

Radiation effects on Li-vacancy ordering in $$beta$$-LiAl at low temperatures

Sugai, Hiroyuki; Yahagi, Masahito*; Kuriyama, Kazuo*; Maeta, H.*

JAERI-Conf 99-013, p.204 - 206, 2000/01

no abstracts in English

Journal Articles

Regrowth of the photoquenchable defect relating to the hopping conduction in arsenic-ion-implanted semi-insulating GaAs

Kuriyama, Kazuo*; Kazama, K.*; Kato, Takashi*; Yamamoto, Shunya; Aoki, Yasushi; Naramoto, Hiroshi

Journal of Applied Physics, 80(8), p.4488 - 4490, 1996/10

 Times Cited Count:1 Percentile:8.39(Physics, Applied)

no abstracts in English

Journal Articles

Defect structure in neutron-irradiated $$beta$$-$$^{6}$$LiAl and $$beta$$-$$^{7}$$LiAl; Electrical resistivity and Li diffusion

Sugai, Hiroyuki; Tanase, Masakazu; Yahagi, Masahito*; *; Hamanaka, Hiromi*; Kuriyama, Kazuo*; *

Physical Review B, 52(6), p.4050 - 4059, 1995/08

 Times Cited Count:17 Percentile:70.03(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Radiation effects on Li-vacancy ordering in $$beta$$-LiAl

Kuriyama, Kazuo*; *; *; Sugai, Hiroyuki; Maeta, Hiroshi; Yahagi, Masahito*

Physical Review B, 52(5), p.3020 - 3022, 1995/08

 Times Cited Count:4 Percentile:26.69(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Effect of an additive on the radiation-resistance of polyethylene and ethylene-propylene copolymer

Fujimura, Takashi; Arakawa, Kazuo; Hayakawa, Naohiro; Kuriyama, Isamu

Polymer, 27, p.2475 - 2482, 1982/00

no abstracts in English

Journal Articles

Radiation induced oxidative degradation of polymers, II; Effects of radiation on swelling and gel function of polymers

Seguchi, Tadao; Arakawa, Kazuo; Hayakawa, Naohiro; ; Kuriyama, Isamu

Radiation Physics and Chemistry, 19(4), p.321 - 327, 1982/00

no abstracts in English

Journal Articles

Dose rate effect on radiation-induced oxidation of polyethylene and ethylene-propylene copolymer

Arakawa, Kazuo; Seguchi, Tadao; ; Hayakawa, Naohiro; Kuriyama, Isamu; Machi, Sueo

Journal of Polymer Science; Polymer Chemistry Edition, 19, p.2123 - 2125, 1981/00

no abstracts in English

Journal Articles

Radiation induced oxidative degradation of polymers, I; Oxidation region in polymer films irradiated in oxygen under pressure

Seguchi, Tadao; ; Arakawa, Kazuo; Hayakawa, Naohiro; Kawakami, Waichiro; Kuriyama, Isamu

Radiation Physics and Chemistry, 17, p.195 - 201, 1981/00

no abstracts in English

JAEA Reports

The Quntitative Analysis of Gas Evolved from High Polymer by $$gamma$$-Irradiation

Arakawa, Kazuo; Hayakawa, Naohiro; Kuriyama, Isamu

JAERI-M 7244, 29 Pages, 1977/09

JAERI-M-7244.pdf:0.81MB

no abstracts in English

17 (Records 1-17 displayed on this page)
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