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Takeda, Nobukazu; Nakahira, Masataka; Tada, Eisuke; Fujita, Satoshi*; Fujita, Takafumi*
Nihon Jishin Kogakkai Rombunshu (Internet), 4(3), p.298 - 304, 2004/04
ITER is a Tokamak-type international fusion experimental device composed of superconducting magnets, a vacuum vessel, and so on. These are operated at a quie wide temperature ranging from 4K to 200 degree C. For this, multiple plates have been chosen as the machine support so as to peovide flexibility in the radial direction while keeping high rigidity vertically. This results in a low natural frequency of around 4Hz in the horizontal direction. Since those structures are designed in accordance with the IAEA seismic acceleration of 0.2g as a reference, a seismic isolation is required if earthquake-proof larger than 0.2g is necessary. Considering these conditions, analytical and experimental studies have been conducted to characterize the ITER dynamic response in Japan. This paper outlines the latest status on seismic design for ITER in Japan and evaluation on tokamak dynamic response and verification tests using scaled tokamak model.
Arai, Takashi; Nishiyama, Tomokazu; Yagyu, Junichi; Kasai, Satoshi; Sone, Isamu*; Abe, Mitsushi*; Miya, Naoyuki
Fusion Science and Technology, 45(1), p.65 - 68, 2004/01
Times Cited Count:2 Percentile:17.10(Nuclear Science & Technology)In a nuclear fusion experiment device, a plasma discharge is to be sustained for a long time in steady state operation. In such a device an electromagnetic sensor that has a signal integrator to measure direct currents will cause a technical problem of zero point drift on signals. So, the detection device using new technology for direct current measurement, optical current transformer (optical CT), was developed. The device has an optical fiber specified for 1550nm (wavelength) was manufactured, and was applied to JT-60U experiments. A gamma ray irradiation examination was also done to the optical CT
Tsunematsu, Toshihide; Seki, Masahiro; Tsuji, Hiroshi; Okuno, Kiyoshi; Kato, Takashi; Shibanuma, Kiyoshi; Hanada, Masaya; Watanabe, Kazuhiro; Sakamoto, Keishi; Imai, Tsuyoshi; et al.
Fusion Science and Technology, 42(1), p.75 - 93, 2002/07
Times Cited Count:1 Percentile:9.91(Nuclear Science & Technology)Japanese contributions to ITER Engineering Design Activity are presented, together with an introduction of the objectives and design of the ITER whose program have been carried out through the international collaboration by EU, Japan, Russian Federation and the USA. New technologies have been produced through the development, fabrication and testing of scalable models in the fields of superconducting magnet, reactor structure with vacuum vessel, high-heat-flux plasma facing component, neutral beam injector, high-power mm-wave generator and so on. As major contributions from Japan, development and testing results of a 13-T, 640-MJ, NbSn pulsed magnet, a 18-degree sector of vacuum vessel with a height of 15 m and a width of 9 m, CFC armors to CuCrZr cooling tube that withstood 20 MW/m, a 31 mA/cm negative ion beam source, a 1-MeV beam-accelerator, a 1-MW 170-GHz gyrotron were described.
Takatsu, Hideyuki
Purazuma, Kaku Yugo Gakkai-Shi, 74(5), p.434 - 435, 1998/05
no abstracts in English
Arai, Takashi; Shimizu, Masatsugu
Purazuma, Kaku Yugo Gakkai-Shi, 71(8), p.726 - 731, 1995/08
no abstracts in English
Onozuka, Masanori*; Tsujimura, Seiichi*; Toyoda, Masahiko*; Inoue, Masahiko*; Abe, Tetsuya; Murakami, Yoshio
Fusion Technology 1994, Vol.1, p.803 - 806, 1995/00
no abstracts in English
Seki, Yasushi; ;
Nihon Genshiryoku Gakkai-Shi, 37(3), 206 Pages, 1995/00
no abstracts in English
Seki, Yasushi
Purazuma, Kaku Yugo Gakkai-Shi, 70(12), 1318 Pages, 1994/12
no abstracts in English
Maekawa, Hiroshi
Proc. of the 8th Int. Conf. on Radiation Shielding, 0, p.15 - 24, 1994/00
no abstracts in English
Ogiwara, Norio
JAERI-M 91-007, 151 Pages, 1991/02
no abstracts in English
Shirakata, Hirofumi
Fusion Engineering and Design, 14, p.7 - 19, 1991/00
Times Cited Count:1 Percentile:19.88(Nuclear Science & Technology)no abstracts in English
Naruse, Yuji; Okuno, Kenji; Yoshida, Hiroshi; Konishi, Satoshi; Anderson, J. L.*; Bartlit, J. R.*
Journal of Nuclear Science and Technology, 27(12), p.1081 - 1095, 1990/12
no abstracts in English
Abe, Tetsuya
Jikken Shinku Gijutsu Soran, p.1024 - 1026, 1990/11
no abstracts in English
Abe, Tetsuya; Murakami, Yoshio; ; ;
Vacuum, 41(7-9), p.1992 - 1994, 1990/00
Times Cited Count:7 Percentile:43.56(Materials Science, Multidisciplinary)no abstracts in English
Abe, Tetsuya
Nihon Genshiryoku Gakkai-Shi, 31(10), p.1106 - 1108, 1989/10
no abstracts in English
Murakami, Yoshio
Fuijikusu, 7(8), p.528 - 531, 1986/08
no abstracts in English
Comments Plasma Phys.Controll.Fus., 26(1A), p.117 - 122, 1984/00
no abstracts in English
Murakami, Yoshio;
Vacuum, 28(5), p.235 - 240, 1978/05
Times Cited Count:9no abstracts in English