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Hayashi, Nobuhiko; Honda, Mitsuru; Hoshino, Kazuo; Hamamatsu, Kiyotaka; Shimizu, Katsuhiro; Takizuka, Tomonori; Ozeki, Takahisa; Fukuyama, Atsushi*
Plasma and Fusion Research (Internet), 6(Sp.1), p.2403065_1 - 2403065_8, 2011/08
Ozeki, Takahisa; Hayashi, Nobuhiko; Honda, Mitsuru; Aiba, Nobuyuki; Hamamatsu, Kiyotaka; Shimizu, Katsuhiro; Kawashima, Hisato; Hoshino, Kazuo; Takizuka, Tomonori; Tokuda, Shinji
Journal of Plasma and Fusion Research SERIES, Vol.8, p.1138 - 1142, 2009/09
Yoshinaka, Kazuyuki; Otsuka, Masahiro*; Hoshino, Masato; Kikuchi, Kenji; Kawata, Tsuyoshi; Taki, Kiyotaka
Nihon Genshiryoku Gakkai Wabun Rombunshi, 7(3), p.268 - 279, 2008/09
The fluorescent liquid penetrant test equipment, for welding part in the evaporator for phosphate liquid waste generated by solvent waste treatment at Tokai reprocessing plant, was developed. It is composed of CCD camera and UV light for observation, sprinkling nozzles for fluorescent liquid, washing water and drying air, and positioning mechanism, which could be arranged position of the equipment to inspection object by 3 axes operation, insert length, bending angle and turn angle. Also, the equipment could be inserted by way of the nozzle, which inside diameter is 60 mm, into the evaporator for inspection. It was confirmed that it could be observed the standard faults, which was defined in JIS, by the equipment. Then, fluorescent liquid penetrant test for the evaporator, which has treated phosphate liquid waste for 18 years, and which heating temperature was about 105 centigrade degree, was done. As the result of the test, it was not observed fault in the evaporator.
Hamamatsu, Kiyotaka; Takizuka, Tomonori; Hayashi, Nobuhiko; Ozeki, Takahisa
Plasma Physics and Controlled Fusion, 49(12), p.1955 - 1969, 2007/12
Times Cited Count：12 Percentile：40.38(Physics, Fluids & Plasmas)no abstracts in English
Hamamatsu, Kiyotaka; Takizuka, Tomonori; Hayashi, Nobuhiko; Ozeki, Takahisa
Proceedings of 10th IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems (Internet), 5 Pages, 2007/00
no abstracts in English
Hamamatsu, Kiyotaka; Takizuka, Tomonori; Hayashi, Nobuhiko; Ozeki, Takahisa
Europhysics Conference Abstracts (CD-ROM), 29C, 4 Pages, 2005/00
no abstracts in English
Hayashi, Nobuhiko; Ozeki, Takahisa; Hamamatsu, Kiyotaka; Takizuka, Tomonori
Nuclear Fusion, 44(4), p.477 - 487, 2004/04
Times Cited Count：35 Percentile：72.74(Physics, Fluids & Plasmas)NTM stabilization by ECCD has been numerically studied in order to evaluate the necessary EC power for the stabilization of NTM on ITER. The time evolution of an island width of NTM is calculated by the modified Rutherford equation. The modification of background current profile by the EC current is calculated by the current diffusion equation and the variation of the tearing stability index 
' is taken into account. When the EC power is higher than a threshold value, NTM with any island width can be fully stabilized. The dependence of the threshold power on parameters in the modified Rutherford equation is examined. The threshold power much depends on the parameters of the bootstrap current term in the modified Rutherford equation. The injected EC current decreases the value of ' through the background current modification, which results in the reduction of the threshold power. The effects of the peakedness of EC current profile and the EC power modulation on the threshold power are investigated. When the width of the EC current profile becomes half, the threshold power is reduced to half or less. The EC power modulation is inessential for the threshold power reduction if the EC current profile can be peaked. Considering the maximum value of the threshold power in the range of the parameters, the EC power of about 25 MW is found to be sufficient for the simultaneous stabilization of both the 
=3/2 and 2/1 mode NTM on ITER.
Hayashi, Nobuhiko; Ozeki, Takahisa; Hamamatsu, Kiyotaka; Takizuka, Tomonori
Journal of Plasma and Fusion Research SERIES, Vol.5, p.519 - 522, 2002/00
Stabilizing simulation of the neoclassical tearing mode by an electron cyclotron current drive (ECCD) in JT-60 superconducting tokamak has been done by using a 1.5D time-dependent tokamak code TOPICS and the modified Rutherford's equation. A local EC current in the center of the island stabilizes the mode. However, the EC current off the center moves the rational surface and decreases the stabilizing effect of EC. Necessary range of EC current location for the stabilization becomes wider for low EC power, or narrower for high EC power, when the EC current profile is more peaked. The long duration of EC injection widens this range. Peaked EC current profile, early injection and long injection duration lower the minimum EC power necessary for the stabilization.
Tobita, Kenji; Hamamatsu, Kiyotaka; Takizuka, Tomonori; *
Purazuma, Kaku Yugo Gakkai-Shi, 75(5), p.582 - 593, 1999/05
no abstracts in English
Hamamatsu, Kiyotaka; Takizuka, Tomonori; Shirai, Hiroshi; Kishimoto, Yasuaki; C.S.Chang*
Europhysics Conference Abstracts (CD-ROM), 23J, p.421 - 424, 1999/00
no abstracts in English
Hamamatsu, Kiyotaka; C.S.Chang*; Takizuka, Tomonori; Azumi, Masafumi; Hirayama, Toshio; S.Cohen*; *
Plasma Physics and Controlled Fusion, 40(2), p.255 - 270, 1998/00
Times Cited Count：9 Percentile：31.98(Physics, Fluids & Plasmas)no abstracts in English
Hamamatsu, Kiyotaka; C.S.Chang*; Takizuka, Tomonori; Azumi, Masafumi; Hirayama, Toshio; S.Cohen*; Tani, Keiji
Fusion Energy 1996, 2, p.683 - 691, 1997/00
no abstracts in English
Tobita, Kenji; Hamamatsu, Kiyotaka; Harano, Hideki*; Nishitani, Takeo; Tani, Keiji; Kusama, Yoshinori; Takizuka, Tomonori; S.Putvinski*
Proc. of 24th European Physical Society Conf. on Controlled Fusion and Plasma Physics, 21A, p.717 - 720, 1997/00
no abstracts in English
Tobita, Kenji; Hamamatsu, Kiyotaka; Harano, Hideki*; Nishitani, Takeo; Kusama, Yoshinori; Kimura, Haruyuki; Takizuka, Tomonori; Fujieda, Hirobumi*; Shoji, Teruaki; Senda, Ikuo*; et al.
Proc. of 5th IAEA Technical Committee Meeting on Alpha Particles in Fusion Research, p.45 - 48, 1997/00
no abstracts in English
Konovalov, S.*; Takizuka, Tomonori; Tani, Keiji; Hamamatsu, Kiyotaka; Azumi, Masafumi
JAERI-Research 94-033, 25 Pages, 1994/11
JAERI-Research-94-033.pdf:0.95MB
no abstracts in English
Kishimoto, Yasuaki; Takizuka, Tomonori; Hamamatsu, Kiyotaka; Fukuyama, Atsushi*; Ito, Sanae*; Ito, Kimitaka
JAERI-M 87-204, 34 Pages, 1987/12
no abstracts in English
Tateishi, Yoshinori*; Tanaka, Yasumasa; *; *; Goto, Tatsuro*; *; *
PNC TN841 84-66, 197 Pages, 1983/08
no abstracts in English
