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Journal Articles

Improvement of polarization measurement in JT-60 ECH system

Sato, Fumiaki*; Moriyama, Shinichi; Yokokura, Kenji; Shinozaki, Shinichi; Hiranai, Shinichi; Suzuki, Yasuo*; Seki, Masami

Heisei-14-Nendo Tokyo Daigaku Sogo Gijutsu Kenkyukai Gijutsu Hokokushu, 3 Pages, 2003/03

no abstracts in English

Journal Articles

Stabilization of neoclassical tearing mode by electron cyclotron wave injection in JT-60U

Isayama, Akihiko; Nagasaki, Kazunobu*; Ide, Shunsuke; Fukuda, Takeshi*; Suzuki, Takahiro; Seki, Masami; Moriyama, Shinichi; Ikeda, Yoshitaka; JT-60 Team

AIP Conference Proceedings 694, p.321 - 324, 2003/00

no abstracts in English

Journal Articles

Transport study in reactor-relevant regime on JT-60U towards advanced steady-state tokamak operation

Takenaga, Hidenobu; JT-60 Team

Proceedings of 30th EPS Conference on Controlled Fusion and Plasma Physics (CD-ROM), 4 Pages, 2003/00

no abstracts in English

Journal Articles

Radiofrequency experiments in JFT-2M; Demonstration of innovative applications of a travelling wave antenna

Ogawa, Toshihide; Hoshino, Katsumichi; Kanazawa, Sadayoshi*; Saigusa, Mikio*; Ido, Takeshi*; Kawashima, Hisato; Kasuya, N.*; Takase, Yuichi*; Kimura, Haruyuki; Miura, Yukitoshi; et al.

Nuclear Fusion, 41(12), p.1767 - 1775, 2001/12

 Times Cited Count:36 Percentile:70.95(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

ITER R&D: Auxiliary systems; Electron cyclotron heating and current drive system

Imai, Tsuyoshi; Kobayashi, Noriyuki*; Temkin, R.*; Thumm, M.*; Tran, M. Q.*; Alikaev, V.*

Fusion Engineering and Design, 55(2-3), p.281 - 289, 2001/07

 Times Cited Count:52 Percentile:94.92(Nuclear Science & Technology)

no abstracts in English

Journal Articles

ECRF Experiments in JT-60U

Isayama, Akihiko; Ikeda, Yoshitaka; Ide, Toshiyuki; Suzuki, Takahiro; Moriyama, Shinichi; Takahashi, Koji; Kajiwara, Ken; Oikawa, Toshihiro; Hamamatsu, Kiyotaka; Kamada, Yutaka; et al.

AIP Conference Proceedings 595, p.267 - 274, 2001/00

no abstracts in English

Journal Articles

New application of a deep grooved polarizer for ECCD

Saigusa, Mikio*; Takei, Nahoko*; Kanazawa, Sadayoshi*; Kikuchi, Yusuke*; Kasugai, Atsushi; Sakamoto, Keishi; Imai, Tsuyoshi

Journal of Plasma and Fusion Research SERIES, Vol.3, p.383 - 386, 2000/00

no abstracts in English

Journal Articles

Chemical vapor deposition diamond window for high-power and long pulse millimeter wave transmission

Kasugai, Atsushi; Sakamoto, Keishi; Tsuneoka, Masaki; *; Imai, Tsuyoshi; Braz, O.*; Thumm, M.*; J.R.Brandon*; R.S.Sussman*; A.Beale*; et al.

Review of Scientific Instruments, 69(5), p.2160 - 2165, 1998/05

 Times Cited Count:68 Percentile:95.24(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Measurement of temperature dependence of dielectric permittivity of sapphire window for high power gyrotrons

Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi; Tsuneoka, Masaki; Imai, Tsuyoshi

Japanese Journal of Applied Physics, 35(8), p.4413 - 4416, 1996/08

 Times Cited Count:5 Percentile:30.93(Physics, Applied)

no abstracts in English

Journal Articles

Stable, single-mode oscillation with high-order volume mode at 1MW, 170GHz gyrotron

Sakamoto, Keishi; Kasugai, Atsushi; Takahashi, Koji; Tsuneoka, Masaki; Imai, Tsuyoshi; Kariya, Tsuyoshi*; Hayashi, Kenichi*

Journal of the Physical Society of Japan, 65(7), p.1888 - 1890, 1996/07

 Times Cited Count:19 Percentile:81.95(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Development of high efficiency gyrotron with depressed collector for ECH system

Sakamoto, Keishi; Tsuneoka, Masaki; Kasugai, Atsushi; Takahashi, Koji; Imai, Tsuyoshi; Kariya, Tsuyoshi*; Hayashi, Kenichi*; Mitsunaka, Yoshika*; Hirata, Yosuke*

Purazuma, Kaku Yugo Gakkai-Shi, 71(10), p.1029 - 1037, 1995/10

no abstracts in English

Journal Articles

Development of high power gyrotrons

*; Imai, Tsuyoshi

Shingaku Giho, 94(405), p.27 - 33, 1994/12

no abstracts in English

JAEA Reports

Conceptual design of Fusion Experimental Reactor(FER/ITER); Electron cyclotron wave system

Yamamoto, Takumi; Tsuneoka, Masaki; Sakamoto, Keishi; Kimura, Haruyuki; Nagashima, Takashi; *; Saito, Yasushi*; *; Ito, Yasuyuki*

JAERI-M 91-194, 41 Pages, 1991/11

JAERI-M-91-194.pdf:1.03MB

no abstracts in English

JAEA Reports

Design of millimeter-wave components at 120GHz for electron cyclotron heating

*; Sakamoto, Keishi; Nagashima, Takashi

JAERI-M 87-208, 39 Pages, 1988/01

JAERI-M-87-208.pdf:0.93MB

no abstracts in English

Journal Articles

Selective electron-cyclotron heating at down-shifted frequency in the lower-hybrid-current-driven plasma on the JFT-2M tokamak

; ; ; ; ; ; *; ; ; ; et al.

Physical Review Letters, 58(21), p.2220 - 2223, 1987/00

 Times Cited Count:26 Percentile:79.55(Physics, Multidisciplinary)

no abstracts in English

JAEA Reports

Study of the second harmonic electron cyclotron heating in JFT-2 M tokamak

; ; ; ; *; ; ; ; Matsumoto, Hiroshi; ; et al.

JAERI-M 86-076, 16 Pages, 1986/05

JAERI-M-86-076.pdf:0.54MB

no abstracts in English

JAEA Reports

An Analysis of Multislot Directional Coupler

*; *;

JAERI-M 86-061, 29 Pages, 1986/03

JAERI-M-86-061.pdf:0.65MB

no abstracts in English

Journal Articles

Electron cyclotron heating and pre-ionization in the JFT-2 tokamak

; ; ; ; ; ; Matsumoto, Hiroshi; ; ; ; et al.

Journal of the Physical Society of Japan, 54(7), p.2503 - 2515, 1985/00

 Times Cited Count:12 Percentile:69.94(Physics, Multidisciplinary)

no abstracts in English

Oral presentation

Research and development of wide band polarizer for high power millimeter waves

Sai, Takuma*; Matsubara, Fumiaki*; Takii, Keita*; Oyama, Gaku*; Saigusa, Mikio*; Kobayashi, Takayuki; Moriyama, Shinichi

no journal, , 

no abstracts in English

Oral presentation

Millimeter fast directional switch system for the NTM suppression experiments on JT-60SA

Idei, Hiroshi*; Moriyama, Shinichi; Kobayashi, Takayuki; Isayama, Akihiko; Sakaguchi, Masatsugu*; Kasparek, W.*

no journal, , 

A FAst DIrectional Switch (FADIS) performance based on steep slope in a diplexer function has been considered for dual-frequency (dual-f) applications to switch the transmission line with small frequency control. A diplexer of a FADIS using a Square Corrugated Waveguide (SCW) splitter was designed as one of most attractive candidates for the dual-f operation on the JT-60SA system. The splitter performance was a key issue for the dual-f operation, and extended operation regions in splitter operations have been considered using mode contents analyses based on matching coefficient evaluation. Some operational branches with high matching coefficients ($$>$$ 0.9) were found, and new operation parameters were proposed for the dual-f application. Radiation pattern distributions from the SCW splitter were defined very well with no serious side lobes. Double loop resonant ring system has been proposed with the SCW splitter for the dual-f operation.

Oral presentation

Research and development of wide band polarizer for high power millimeter wave

Sai, Takuma*; Matsubara, Fumiaki*; Ishida, Yoshitaka*; Saigusa, Mikio*; Kobayashi, Takayuki; Moriyama, Shinichi

no journal, , 

A wideband polarizer were developed for an electron cyclotron current driving system in JT-60SA. The wideband polarizer consists of a twister and a circular polarizers. The polarization properties of the twister was confirmed in cold tests. A high power test of the twister was carried out at an input power of 0.25 MW, 3 s at a frequency of 110 GHz. A new polarizer was designed for next high power tests. The circular polarizer of the different groove period was simulated by numerical simulations using a FDTD method.

21 (Records 1-20 displayed on this page)