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Yagisawa, Hiroshi; Arai, Takashi; Goto, Yoshitaka*
Heisei-16-Nendo Osaka Daigaku Sogo Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 Pages, 2005/03
no abstracts in English
Masaki, Kei; Sugiyama, Kazuyoshi*; Hayashi, Takao; Ochiai, Kentaro; Goto, Yoshitaka*; Shibahara, Takahiro*; Hirohata, Yuko*; Oya, Yasuhisa*; Miya, Naoyuki; Tanabe, Tetsuo*
Journal of Nuclear Materials, 337-339, p.553 - 559, 2005/03
Times Cited Count：26 Percentile：84.04(Materials Science, Multidisciplinary)no abstracts in English
Goto, Yoshitaka*; Arai, Takashi; Yagyu, Junichi; Masaki, Kei; Kodama, Kozo; Miya, Naoyuki
Journal of Nuclear Materials, 329-333(1), p.840 - 844, 2004/08
Times Cited Count：15 Percentile：68.2(Materials Science, Multidisciplinary)TEM and Selected Area Diffraction (SAD) were made on nm-structures of redeposition layers on graphite tiles used in the lower-X-point divertor of JT-60. The tiles were used in the 1988 experimental campaign in which 300 divertor discharges and 1500 limiter discharges were made. TEM observations were made at poloidal and/or toroidal sections at two positions on the inboard side of the inner-separatrix strike point. Layer structures in 0-6micron depths were correlated to the last 40-shots in the campaign. Columnar structures corresponded to divertor discharges of additional heating power below 10MW. Lamellar structures were due to limiter discharges or to the higher power divertor discharges. Carbon-Mo, Ti or carbon-Ni, Fe, Cr, Ti codeposition layers were ascribed to disruptive shots. From analyses on poloidal orientation of the column axes and graphene sheets composing columns, the observed columnar structures were ascribed to both low adatom-migration due to the low deposition temperatures and also to self-shadowing effects due to inclined incidence of carbon impurity ions.
Miya, Naoyuki; Tanabe, Tetsuo*; Nishikawa, Masabumi*; Okuno, Kenji*; Hirohata, Yuko*; Oya, Yasuhisa*
Journal of Nuclear Materials, 329-333(1), p.74 - 80, 2004/08
Times Cited Count：12 Percentile：61.53(Materials Science, Multidisciplinary)no abstracts in English
Goto, Yoshitaka*
Kaku Yugoro, (11), p.34 - 37, 2004/03
Recent results of erosion and re-deposition studies are reported for graphite tiles from W-shaped divertor region of JT-60U. The tiles were operated in Jun. 1997 - Oct. 1998 periods in which more than 3000 D-D discharge experiments were made with all-carbon walls with 2-times boronizations and inner-private flux pumping. Erosion depth was estimated by using dial gauge, while deposition was measured with SEM. On the outer divertor target, erosion was found dominant, while on the inner target, re-deposition was found to be dominant. No continuous deposition layers on the dome top. Observed in/out asymmetry is attributable to in/out asymmetry of plasma particle conditions in front of the divertor plates. Columnar structures in the redeposition layers corresponded to the lower heat-flux zone, while lamellar structures were found in the overlayers in the higher heat-flux zone near the separatrix strike point.
Yagisawa, Hiroshi; Arai, Takashi; Goto, Yoshitaka*; Kaminaga, Atsushi; Miya, Naoyuki
KEK Proceedings 2003-16 (CD-ROM), 4 Pages, 2004/02
no abstracts in English
Tobita, Kenji; Nishio, Satoshi; Konishi, Satoshi; Sato, Masayasu; Tanabe, Tetsuo*; Masaki, Kei; Miya, Naoyuki
Fusion Engineering and Design, 65(4), p.561 - 568, 2003/07
Times Cited Count：20 Percentile：77.2(Nuclear Science & Technology)no abstracts in English
Tamai, Hiroshi; Yoshino, Ryuji; Tokuda, Shinji; Kurita, Genichi; Neyatani, Yuzuru; Bakhtiari, M.; Khayratdinov, R. R.*; Lukash, V.*; Rosenbluth, M. N.*; JT-60 Team
Nuclear Fusion, 42(3), p.290 - 294, 2002/03
Times Cited Count：34 Percentile：70.69(Physics, Fluids & Plasmas)no abstracts in English
Asakura, Nobuyuki; Loarte, A.*; Porter, G.*; Philipps, V.*; Lipschultz, B.*; Kallenbach, A.*; Matthews, G.*; Federici, G.*; Kukushkin, A.*; Mahdavi, A.*; et al.
IAEA-CN-94/CT/P-01, 5 Pages, 2002/00
Three important physics issues for the ITER divertor design and operation are summarized based on the experimental and numerical work from multi-machine database (JET, JT-60U, ASDEX Upgrade, DIII-D, Alcator C-Mod and TEXTOR). (i) The energy load associated with Type-I ELMs is of great concern for the lifetime of the ITER divertor target. In order to understand the physics base of the scaling models, the ELM heat and particle transport to the divertor is investigated. Convective transport during ELMs plays an important role in heat transport to the divertor. (ii) Determination of the SOL flow pattern and the driving mechanism has progressed experimentally and numerically. Influences of the drift effects on the SOL and divertor plasma transport were discussed. (iii) Characteristics of chemical yield at two different deposited carbon surfaces, i.e. erosion- and redeposition-dominated areas, have been studied. Progress of understanding the chemical erosion is reviewed.
Masaki, Kei; Akiba, Masato
Purazuma, Kaku Yugo Gakkai-Shi, 77(9), p.884 - 893, 2001/09
no abstracts in English
O
containing tungsten materialTaniguchi, Masaki; Nakamura, Kazuyuki; Sato, Kazuyoshi; Ezato, Koichiro; Yokoyama, Kenji; Akiba, Masato
Fusion Technology, 39(No.2 Part.2), p.890 - 893, 2001/03
no abstracts in English
Hino, Tomoaki*; Hirohata, Yuko*; Yamauchi, Yuji*; Sengoku, Seio
Proceedings of IAEA 18th Fusion Energy Conference (CD-ROM), 5 Pages, 2001/00
no abstracts in English
Sato, Kazuyoshi; Ishitsuka, Etsuo; Uda, Minoru*; Kawamura, Hiroshi; Suzuki, Satoshi; Taniguchi, Masaki; Ezato, Koichiro; Akiba, Masato
Journal of Nuclear Materials, 283-287(2), p.1157 - 1160, 2000/12
Times Cited Count：6 Percentile：42.66(Materials Science, Multidisciplinary)no abstracts in English
Uda, Minoru*; Ishitsuka, Etsuo; Sato, Kazuyoshi; Akiba, Masato; *; Kawamura, Hiroshi
Phys. Scr., T81, p.98 - 100, 1999/00
Times Cited Count：2 Percentile：26.15(Physics, Multidisciplinary)no abstracts in English
Masaki, Kei; ; ; Morimoto, Masaaki*; *; Hosogane, Nobuyuki; Sakurai, Shinji; Saido, Masahiro
Purazuma, Kaku Yugo Gakkai-Shi, 74(9), p.1048 - 1053, 1998/09
no abstracts in English
Uda, Minoru*; Ishitsuka, Etsuo; Sato, Kazuyoshi; Akiba, Masato; *; *; Kawamura, Hiroshi
Fusion Technology 1998, 1, p.161 - 164, 1998/00
no abstracts in English
Masaki, Kei; ; Morimoto, Masaaki*; ; *; Hosogane, Nobuyuki; Saido, Masahiro
Fusion Technology 1998, p.67 - 70, 1998/00
no abstracts in English
C-overlaid CFC/graphitesAndo, Toshiro; Yamamoto, Masahiro; Arai, Takashi; Kaminaga, Atsushi; ; Saido, Masahiro; *; ; Shimizu, Masatsugu; Akiba, Masato; et al.
Fusion Technology 1992, p.161 - 165, 1993/00
no abstracts in English
Fujita, Ichiro*; Amemiya, Susumu*; Hino, Tomoaki*; Yamashina, Toshiro*; Akiba, Masato; Ando, Toshiro; Seki, Masahiro
Journal of Nuclear Materials, 196-198, p.168 - 173, 1992/12
Times Cited Count：7 Percentile：57.46(Materials Science, Multidisciplinary)no abstracts in English
ion Irradiated at Ambient Temperature; ; Shiraishi, K.
JAERI-M 6585, 25 Pages, 1976/06
no abstracts in English
Homma, Yuki; Hoshino, Kazuo; Yamoto, Shohei*; Asakura, Nobuyuki; Tokunaga, Shinsuke; Hatayama, Akiyoshi*; Sakamoto, Yoshiteru; Hiwatari, Ryoji; Tobita, Kenji
no journal, ,
no abstracts in English
