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Kojima, Atsushi; Umeda, Naotaka; Hanada, Masaya; Yoshida, Masafumi; Kashiwagi, Mieko; Tobari, Hiroyuki; Watanabe, Kazuhiro; Akino, Noboru; Komata, Masao; Mogaki, Kazuhiko; et al.
Nuclear Fusion, 55(6), p.063006_1 - 063006_9, 2015/06
Times Cited Count：41 Percentile：89.45(Physics, Fluids & Plasmas)Significant progresses in the extension of pulse durations of powerful negative ion beams have been made to realize the neutral beam injectors for JT-60SA and ITER. In order to overcome common issues of the long pulse production/acceleration of negative ion beams in JT-60SA and ITER, the new technologies have been developed in the JT-60SA ion source and the MeV accelerator in Japan Atomic Energy Agency. As for the long pulse production of high-current negative ions for JT-60SA ion source, the pulse durations have been successfully increased from 30 s at 13 A on JT-60U to 100 s at 15 A by modifying the JT-60SA ion source, which satisfies the required pulse duration of 100 s and 70% of the rated beam current for JT-60SA. This progress was based on the R&D efforts for the temperature control of the plasma grid and uniform negative ion productions with the modified tent-shaped filter field configuration. Moreover, the each parameter of the required beam energy, current and pulse has been achieved individually by these R&D efforts. The developed techniques are useful to design the ITER ion source because the sustainment of the cesium coverage in large extraction area is one of the common issues between JT-60SA and ITER. As for the long pulse acceleration of high power density beams in the MeV accelerator for ITER, the pulse duration of MeV-class negative ion beams has been extended by more than 2 orders of magnitude by modifying the extraction grid with a high cooling capability and a high-transmission of negative ions. A long pulse acceleration of 60 s has been achieved at 70 MW/m
(683 keV, 100 A/m) which has reached to the power density of JT-60SA level of 65 MW/m.
Morishita, Takatoshi; Kashiwagi, Mieko; Okumura, Yoshikazu; Watanabe, Kazuhiro; Hanada, Masaya; Inoue, Takashi; Imai, Tsuyoshi
Dai-12-Kai Ryushisen No Sentanteki Oyo Gijutsu Ni Kansuru Shimpojiumu (BEAMS 2001) Hobunshu, p.33 - 36, 2001/11
no abstracts in English
Watanabe, Kazuhiro
Denki Gakkai-Shi, 121(6), p.384 - 386, 2001/06
no abstracts in English
Watanabe, Kazuhiro; Okumura, Yoshikazu; Ono, Yoichi*; Tanaka, Masanobu*
Heisei-13-Nen Denki Gakkai Zenkoku Taikai Koen Rombunshu, P. 3081, 2001/03
no abstracts in English
Okumura, Yoshikazu; *; *; *; *
Genshiryoku To Sentan Gijutsu, 2; NSA/Commentaries, No.3, p.135 - 169, 1995/06
no abstracts in English
Matsuoka, Mamoru; Araki, Masanori; Mizuno, Makoto
Fusion Technology, 26, p.1296 - 1303, 1994/12
no abstracts in English
Mizuno, Makoto; Hanada, Masaya; Inoue, Takashi; Ohara, Yoshihiro; Okumura, Yoshikazu; Tanaka, Shigeru; Watanabe, Kazuhiro; Asahara, Masaharu*; *; *; et al.
Fusion Engineering and Design, 23, p.49 - 55, 1993/00
Times Cited Count：3 Percentile：38.04(Nuclear Science & Technology)no abstracts in English
Matsuoka, Mamoru; *; Matsuda, Shinzaburo; *; Mizuno, Makoto; *; Watanabe, Kazuhiro; *
Denki Gakkai Rombunshi, B, 112(11), p.1035 - 1044, 1992/00
no abstracts in English
Matsuoka, Mamoru; Horiike, Hiroshi; Ito, Takao; Kawai, Mikito; Kikuchi, Mitsuru; Kuriyama, Masaaki; Mizuno, Makoto; Tanaka, Shigeru
Fusion Technology, 19, p.113 - 130, 1991/01
no abstracts in English
Okumura, Yoshikazu; Hanada, Masaya; Inoue, Takashi; Ohara, Yoshihiro; Mizuno, Makoto; Suzuki, Yasuo*; Tanaka, Hideki*; Watanabe, Kazuhiro
Dai-1-Kai Ryushisen No Sentanteki Oyo Gijutsu Ni Kansuru Wakushoppu, p.69 - 72, 1990/11
no abstracts in English
Matsuoka, Mamoru; Akiba, Masato; *; Horiike, Hiroshi; Kuriyama, Masaaki; Matsuda, Shinzaburo; Ohara, Yoshihiro
Review of Scientific Instruments, 61(10), p.2614 - 2622, 1990/10
Times Cited Count：1 Percentile：34.82(Instruments & Instrumentation)no abstracts in English
Nihon Genshiryoku Gakkai-Shi, 28(7), p.573 - 579, 1986/00
Times Cited Count：0 Percentile：0.02(Nuclear Science & Technology)no abstracts in English
; ; ; ; Matsuda, Shinzaburo; ; *; Ohara, Yoshihiro;
JAERI-M 84-112, 20 Pages, 1984/06
no abstracts in English
;
JAERI-M 82-209, 18 Pages, 1982/12
no abstracts in English
JAERI-M 82-154, 169 Pages, 1982/11
no abstracts in English
; ; Ohara, Yoshihiro;
JAERI-M 9852, 41 Pages, 1981/12
no abstracts in English
; Ohara, Yoshihiro;
JAERI-M 9653, 16 Pages, 1981/09
no abstracts in English
; Mizutani, Yasuhiko*; ; *;
JAERI-M 9213, 8 Pages, 1980/11
no abstracts in English
*; Matsuda, Shinzaburo;
JAERI-M 8936, 12 Pages, 1980/07
no abstracts in English
; ; ; Matsuda, Shinzaburo; *;
JAERI-M 8935, 34 Pages, 1980/07
no abstracts in English
