Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Yamamoto, Masahiro*; Okano, Fuminori; Tsuzuki, Kazuhiro; Ogawa, Hiroaki; Suzuki, Sadaaki; Shibata, Takatoshi
JAERI-Tech 2005-061, 11 Pages, 2005/09
JAERI-Tech-2005-061.pdf:0.94MB
Ferritic steel plates were installed in the JFT-2M vacuum vessel to conduct "the Advanced Material Tokamak Experiments (AMTEX)". A coating device with tri-methyl-bron(TMB)was developed to coat the ferritic steel surface with boron, since the ferritic steel is easy to rust and also has a property to absorb much impurity in the surface. The TMB gas used in the device was diluted with helium gas to 1% for ensuring workers themselves against the toxicity of the TMB. The uniformity and stability of the coated layer have been confirmed through sample tests with a microscope, whose samples had been set in the tokamak vacuum vessel. The coating thickness measured with X-ray photoelectron emission spectroscopy was roughly 130nm. In the plasma experiments after the boron coating, radiation loss in the plasma decreased to 1/3, and oxygen impurity also decreased to 1/10 compared to without the boron coating.
Okubo, Nariaki; Wakai, Eiichi; Matsukawa, Shingo; Tanigawa, Hiroyasu; Sawai, Tomotsugu; Jitsukawa, Shiro; Onuki, Somei*
Materials Transactions, 46(8), p.1779 - 1782, 2005/08
Times Cited Count：1 Percentile：16.22(Materials Science, Multidisciplinary)no abstracts in English
Wakai, Eiichi; Sato, Michitaka*; Okubo, Nariaki; Sawai, Tomotsugu; Shiba, Kiyoyuki; Jitsukawa, Shiro
Nihon Kinzoku Gakkai-Shi, 69(6), p.460 - 464, 2005/06
Times Cited Count：1 Percentile：16.22(Metallurgy & Metallurgical Engineering)no abstracts in English
Sudo, Tomoko*; Ohashi, Kazutoshi*; Sato, Toshimaro*; Ota, Eiji*; Okayasu, Satoru; Sugai, Hiroyuki
Physical Review B, 71(4), p.045211_1 - 045211_7, 2005/01
Times Cited Count：1 Percentile：7.18(Materials Science, Multidisciplinary)We have measured low frequency generation-recombination noise (g-r moise) spectra of a heavily boro-doped diamond crystal over the temperature range 20-300 K. The experimental results show that there are two peaks in the g-r noise spectrum at 120 K and 67 K, respectively. The 120 K peak corresponds to experimental evidence for the existence of hard gap having width of 10.4 meV. We interpret the 67 K peak as evidence for Wigner lattice formation whose gap width is 5.8 meV.
impurity deposition on the JT-60 divertor tilesMasaki, Kei; Yagyu, Junichi; Miyo, Yasuhiko; Goto, Yoshitaka*; Arai, Takashi; Hayashi, Takao; Kodama, Kozo; Sasajima, Tadayuki; Kaminaga, Atsushi; Tanabe, Tetsuo*; et al.
Journal of Nuclear Materials, 329-333(Part1), p.845 - 848, 2004/08
Times Cited Count：0 Percentile：0.01(Materials Science, Multidisciplinary)no abstracts in English
D
) in JT-60UNakano, Tomohide; Higashijima, Satoru; Kubo, Hirotaka; Yagyu, Junichi; Arai, Takashi; Asakura, Nobuyuki; Itami, Kiyoshi
Journal of Nuclear Materials, 313-316(1-3), p.149 - 152, 2003/03
Times Cited Count：29 Percentile：85.55(Materials Science, Multidisciplinary)In JT-60U, boronization using hydride-decaborane (BD) was performed to reduce oxygen impurity and particle recycling. A problem of the boronization was that hydrogen originating from hydride-decaborane diluted core deuterium plasmas. In order to minimize the number of conditioning tokamak discharges, boronization using deuterated-decaborane (BD) has been introduced recently. In order to investigate durability of the boronization effects, discharges with an identical condition were repeated. Boronization using 20 g of deuterated-decaborane could reduce a core oxygen content from 
1.9% to only 1.3% in L-mode discharges with a neutral beam heating power of 4 MW. Boronization using 70 g of deuterated-decaborane reduced the core oxygen content from 2.2% to 0.5%. After the boronization using 70 g of deuterated-decaborane ( thickness of the Boron layer 135 nm ), the core oxygen content increased gradually from 0.5% to 1% in 400 shots.
Yagyu, Junichi; Goto, Yoshitaka*; Arai, Takashi; Miya, Naoyuki; Morimoto, Yasutomi*; Okuno, Kenji*; Oya, Yasuhisa*; Hirohata, Yuko*; Tanabe, Tetsuo*
Heisei-15-Nendo Kiki, Bunseki Gijutsu Kenkyukai Hokoku, p.105 - 108, 2003/00
no abstracts in English
Oigawa, Hiroyuki; Iijima, Susumu; Ando, Masaki
Journal of Nuclear Science and Technology, 39(7), p.729 - 735, 2002/07
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Kizu, Kaname; Yagyu, Junichi; Goto, Yoshitaka*; Arai, Takashi; Miya, Naoyuki
Fusion Science and Technology, 41(3), p.907 - 911, 2002/05
no abstracts in English
Tsuzuki, Kazuhiro; Isei, Nobuaki; Kawashima, Hisato; Sato, Masayasu; Kimura, Haruyuki; Ogawa, Hiroaki; Miura, Yukitoshi; Ogawa, Toshihide; Shibata, Takatoshi; Akiyama, Takashi*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 78(5), p.455 - 461, 2002/05
no abstracts in English
Kimura, Haruyuki; Sato, Masayasu; Kawashima, Hisato; Isei, Nobuaki; Tsuzuki, Kazuhiro; Ogawa, Hiroaki; Ogawa, Toshihide; Miura, Yukitoshi; Yamamoto, Masahiro; Shibata, Takatoshi; et al.
Fusion Engineering and Design, 56-57, p.837 - 841, 2001/10
Times Cited Count：14 Percentile：68.89(Nuclear Science & Technology)no abstracts in English
-ray analysis device at JRR-4Hori, Naohiko; Yamamoto, Tetsuya*; Matsumura, Akira*; Torii, Yoshiya; Yamamoto, Kazuyoshi; Kishi, Toshiaki; Takada, Juntaro*
Proceedings of 9th International Symposium on Neutron Capture Therapy for Cancer, p.263 - 264, 2000/10
no abstracts in English
Tachibana, Katsumi; Nishi, Hiroshi; Eto, Motokuni;
JAERI-Tech 99-024, 65 Pages, 1999/03
no abstracts in English
Yamamoto, Toshihiro; Miyoshi, Yoshinori
JAERI-Research 99-026, 24 Pages, 1999/03
JAERI-Research-99-026.pdf:0.97MB
no abstracts in English
Kaneko, Junichi; Katagiri, Masaki; Ikeda, Yujiro; Nishitani, Takeo
Nuclear Instruments and Methods in Physics Research A, 422, p.211 - 215, 1999/00
Times Cited Count：24 Percentile：83.87(Instruments & Instrumentation)no abstracts in English
Kaneko, Junichi; Katagiri, Masaki; Ikeda, Yujiro; Nishitani, Takeo
Advanced Materials'98;Advanced Materials Research Utilizing Extreme Conditions, p.257 - 260, 1998/00
no abstracts in English
Kaneko, Junichi; Katagiri, Masaki; Ikeda, Yujiro; Nishitani, Takeo
Radiation Detectors and Their Uses, p.259 - 263, 1998/00
no abstracts in English
Saido, Masahiro; Yagyu, Junichi; Yamamoto, Shunya; Goppelt-Langer, P.*; Aoki, Yasushi; Takeshita, Hidefumi; Naramoto, Hiroshi
Dai-4-Kai TIARA Kenkyu Happyokai Yoshishu, 0, p.44 - 45, 1995/00
no abstracts in English
Ogiwara, Norio; *; Saido, Masahiro; *; Saito, Yoshio*; *; *; *; *
Journal of Nuclear Materials, 220-222, p.748 - 751, 1995/00
Times Cited Count：3 Percentile：36.7(Materials Science, Multidisciplinary)no abstracts in English
*; Ando, Toshiro; ; Arai, Takashi; Neyatani, Yuzuru; Yoshino, Ryuji; Tsuji, Shunji; Yagyu, Junichi; Kaminaga, Atsushi; ; et al.
Journal of Nuclear Materials, 220-222, p.390 - 394, 1995/00
Times Cited Count：16 Percentile：80.74(Materials Science, Multidisciplinary)no abstracts in English
