Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Tsuneyuki Fujii"'
Autor:
Tsuneyuki Fujii, K. Yokokura, Shinichi Shinozaki, Shinichi Hiranai, S. Moriyama, Mitsugu Shimono, M. Terakado, K. Hasegawa, Masami Seki
Publikováno v:
Fusion Engineering and Design. 74:273-277
A multijunction-type LH antenna in JT-60U had been damaged through excessive heat loads owing to a direct plasma bombardment or an RF breakdown during 10-years operation. To repair the antenna and also enhance the injected power, thin carbon grills a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07ed3a99da2b5ddf2e8eaae815e6424a
https://doi.org/10.1016/j.fusengdes.2005.06.002
https://doi.org/10.1016/j.fusengdes.2005.06.002
Autor:
Akihiko Isayama, Masami Seki, Shunsuke Ide, S. Moriyama, Takahiro Suzuki, Mitsugu Shimono, M. Terakado, Tsuneyuki Fujii
Publikováno v:
Fusion Engineering and Design. 74:343-349
To contribute to high performance long pulse (∼65 s) experiments in JT-60U, the target of the electron cyclotron (EC) operation in long pulse is 0.6 MW for 30 s with four gyrotrons, though 10 MJ (2.8 MW and 3.6 s) was achieved in high power operati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0034567b24bb170b74046295a76394b
https://doi.org/10.1016/j.fusengdes.2005.06.060
https://doi.org/10.1016/j.fusengdes.2005.06.060
Autor:
Tsuyoshi Kariya, Keishi Sakamoto, Koji Takahashi, K. Kajiwara, Masaki Tsuneoka, Hiroaki Shoyama, Yoshitaka Ikeda, Tsuneyuki Fujii, Atsushi Kasugai, Y. Ikeda, Yoshika Mitsunaka, Tsuyoshi Imai
Publikováno v:
Fusion Engineering and Design. 53:399-406
A 110 GHz-Gaussian beam output gyrotron with chemical vapor deposition (CVD) diamond window was developed for electron cyclotron heating and current drive on JT-60U. A stable Gaussian output beam power of 1.0 MW for 2 s was obtained with depressed co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::054757daa43304531433ca5c6919504a
https://doi.org/10.1016/s0920-3796(00)00516-0
https://doi.org/10.1016/s0920-3796(00)00516-0
Autor:
M. Ohta, S. Moriyama, Haruyuki Kimura, K. Anno, S.G. Mcnees, Douglas B. Remsen, Shinichi Shinozaki, M. Saigusa, Tsuneyuki Fujii, Yoshiro Ogawa, C.Marshall Loring, M. Terakado, Takayoshi Yamane, Takashi Nagashima, Ken Oihara
Publikováno v:
Fusion Engineering and Design. 19:41-52
This paper reports the test results of newly developed Varian tetrodes, X2242 and X2274, using a JT-60 ICRF amplifier under the US-Japan collaboration program. The JT-60 ICRF amplifier was designed to deliver 0.75 MW at 110 to 131 MHz with the Varian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b0bb9ce874a1a3dc3003831dec47c42
https://doi.org/10.1016/0920-3796(92)90062-9
https://doi.org/10.1016/0920-3796(92)90062-9
Autor:
Yoshitaka Ikeda, Tsuneyuki Fujii, Kazuya Uehara, M. Saigusa, K. Yokokura, Masayuki Sawahata, Tsuyoshi Imai, M. Honda, Keishi Sakamoto, Sunao Maebara, Takashi Nagashima
Publikováno v:
Fusion Engineering and Design. 13:177-185
RF heating system with total power of 24 MW fed by 1 MW klystrons at around 2 GHz have been developed and operated successfully in the JT-60 tokamak. System performance has been demonstrated in a real plasma load. A super high power system has worked
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87b6e37ef492fc11970c821ebafd7edb
https://doi.org/10.1016/0920-3796(90)90098-q
https://doi.org/10.1016/0920-3796(90)90098-q
Autor:
Haruyuki Kimura, Noriyuki Kobayashi, M. Saigusa, Tsuneyuki Fujii, Yasushi Saitoh, Yoshitaka Ikeda
Publikováno v:
Fusion Engineering and Design. 12:481-491
It was planned to move a stub rf terminator during rf injection for producing a good impedance matching of an antenna with a few plasma shots in JT-60 ICRF heating experiment. A choke stub was adopted to effect this operation. Rf leakage and high pow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa0600e33cfb2a4abc9144c8f33ecef9
https://doi.org/10.1016/0920-3796(90)90041-4
https://doi.org/10.1016/0920-3796(90)90041-4
Autor:
Noriyuki Kobayashi, Sunao Maebara, Tsuneyuki Fujii, Takumi Yamamoto, Mikio Saigusa, Yoshiroh Ogawa, Heiji Okutsu, Shinichi Moriyama, Haruyuki Kimura
A MW-class RF generator combined of a high power tetrode and a solid-state driver is designed for ICRH in the next generation tokamaks, e.g., ITER. A control grid of the tetrode is directly driven by the switching circuit which consists of field effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08425a37cc344d5abc569c19371d615a
https://doi.org/10.1016/b978-0-444-82220-8.50105-9
https://doi.org/10.1016/b978-0-444-82220-8.50105-9
Autor:
Tsuneyuki Fujii, Masami Seki, Masayuki Terakado, Takayuki Kobayashi, Masayuki Sawahata, Shinichi Moriyama
Publikováno v:
Plasma and Fusion Research. 3:014-014
High-power gyrotrons are required for electron cyclotron heating/current drive in high-performance plasma experiments. In Japan Atomic Energy Agency, the operation conditions of the JT-60U gyrotron, which was originally designed as a 1-MW gyrotron, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc0dacc57b84ec66552d238135575e86
https://doi.org/10.1585/pfr.3.014
https://doi.org/10.1585/pfr.3.014
Autor:
Keishi Sakamoto, Koji Takahashi, Atsushi Kasugai, Kenichi Hayashi, Yoshitaka Ikeda, Ken Kajiwara, Tsuyoshi Kariya, Yoshika Mitsunaka, Tsuneyuki Fujii, Tsuyoshi Imai
Publikováno v:
Electron Cyclotron Emission & Electron Cyclotron Heating (Ec12), Proceedings of the 12th Joint Workshop; 2003, p535-540, 6p
Publikováno v:
Japanese Journal of Applied Physics. 37:6204
A frequency feedback control (FFC) system was designed and fabricated for, and utilized in, an ion cyclotron range of frequency (ICRF) heating system in JT-60U. The FFC was confirmed to be quite effective in maintaining the impedance matching between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f69603159146d317c187df46b173238d
https://doi.org/10.1143/jjap.37.6204
https://doi.org/10.1143/jjap.37.6204