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Takahashi, Koji; Kajiwara, Ken; Okazaki, Yukio*; Oda, Yasuhisa; Sakamoto, Keishi; Omori, Toshimichi*; Henderson, M.*
Fusion Engineering and Design, 86(6-8), p.982 - 986, 2011/10
Times Cited Count：7 Percentile：48.91(Nuclear Science & Technology)In order to optimize the physics performance of ITER, the millimeter (mm) wave design of the equatorial electron cyclotron launcher is modified so that one-third of the total mm-wave injection power can be flipped to drive plasma current in the counter direction. The design change to perform the poloidal beam tilting of 5
at top and bottom beam row is conducted so that more efficient central power deposition is achievable. The opening shape in the blanket shield module (BSM) structure is also optimized to minimize the degradation of the mm-wave transmission efficiency. The degradation is only 0.3%. The modularization design of the steering mirror components and the internal shield, the application of a rail structure to perform the alignment of the steering mirror installation and the space allocation behind the BSM structure are implemented to increase the reliability, the manufacturability and the maintenability of the launcher design.
Sakamoto, Keishi; Kasugai, Atsushi; Tsuneoka, Masaki; ; Imai, Tsuyoshi; *; Hayashi, Kenichi*; Mitsunaka, Yoshika*; Hirata, Yosuke*; *; et al.
Proceedings of 17th IEEE/NPSS Symposium Fusion Engineering (SOFE'97), 1, p.441 - 444, 1998/00
no abstracts in English
Sakamoto, Keishi; Kasugai, Atsushi; Tsuneoka, Masaki; Takahashi, Koji; ; Imai, Tsuyoshi; *; Hayashi, Kenichi*; Mitsunaka, Yoshika*; Hirata, Yosuke*; et al.
22nd International Conference on Infrared and Millimeter Waves Conference Digest, p.106 - 107, 1997/00
no abstracts in English
Sakamoto, Keishi; Tsuneoka, Masaki; Kasugai, Atsushi; Takahashi, Koji; Maebara, Sunao; Imai, Tsuyoshi; Kariya, Tsuyoshi*; *; Hayashi, Kenichi*; Mitsunaka, Yoshika*; et al.
Fusion Technology 1994, 0, p.501 - 504, 1995/00
no abstracts in English
Kasugai, Atsushi; Sakamoto, Keishi; Tsuneoka, Masaki; Takahashi, Koji; Maebara, Sunao; Imai, Tsuyoshi; Kariya, Tsuyoshi*; *; Hayashi, Kenichi*; Mitsunaka, Yoshika*; et al.
Int. Electron Devices Meeting 1994, 0, p.9.1.1 - 9.1.4, 1994/00
no abstracts in English
Yoshimura, Kimitaka*; Okazaki, Koji*; Osato, Kazumi*; Nakashima, Satoshi*; Osawa, Kenji*; Yabuuchi, Satoshi; Yamanaka, Yoshiaki; Shigeta, Naotaka
no journal, ,
no abstracts in English
Kasugai, Atsushi; Kajiwara, Ken; Oda, Yasuhisa; Takahashi, Koji; Hayashi, Kazuo; Okazaki, Yukio*; Sakamoto, Keishi
no journal, ,
Next target in the JAEA is development of advanced gyrotron for ITER such as high power repetitive operation, high frequency power modulation and dual frequencies. In repetitive operation, 400 s pulse operation was 10 times with pulse interval of 30 min was demonstrated. In high frequency power modulation, 300Hz-5min full modulation and 5kHz-10s RF modulation were demonstrated. In parallel, higher order mode gyrotron with TE31,11 have been manufactured and high power test was just started. In preliminary result, dual frequencies of 170 GHz with TE31,11 and 137 GHz with TE 25, 9 and high power output more than 1 MW were obtained in the short pulse operation.
Yoshimura, Kimitaka*; Okazaki, Koji*; Osato, Kazumi*; Osawa, Kenji*; Yamaoka, Masanobu*; Nakashima, Satoshi*; Shigeta, Naotaka; Yabuuchi, Satoshi; Yamanaka, Yoshiaki*
no journal, ,
no abstracts in English
Osato, Kazumi*; Yamaoka, Masanobu*; Nakashima, Satoshi*; Yoshimura, Kimitaka*; Okazaki, Koji*; Shigeta, Naotaka; Yabuuchi, Satoshi; Yamanaka, Yoshiaki*
no journal, ,
no abstracts in English
Sakashita, Susumu*; Konishi, Chisato*; Yoshimura, Kimitaka*; Okazaki, Koji*; Shigeta, Naotaka; Yabuuchi, Satoshi; Yamanaka, Yoshiaki*
no journal, ,
no abstracts in English
Takahashi, Koji; Kajiwara, Ken; Oda, Yasuhisa; Okazaki, Yukio*; Kobayashi, Noriyuki*; Sakamoto, Keishi
no journal, ,
no abstracts in English
