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Nemoto, Yoshiyuki; Oishi, Makoto; Ito, Masayasu; Kaji, Yoshiyuki
Nihon Hozen Gakkai Dai-12-Kai Gakujutsu Koenkai Yoshishu, p.105 - 112, 2015/07
Authors previously reported that Eddy current method and AC magnetization method have potential to be applied for development of diagnostic technics to detect the sign of material degradation before cracking on the austenitic stainless steels used as structural material in nuclear power plants. In typical austenitic stainless steels such as type304, magnetic ferrite phase would exist in the alloy before irradiation, and it is concerned to disturb the magnetic measurement on irradiated material. Magnetic measurements were conducted in this work on type304 austenitic stainless steel specimens irradiated up to different doses. In addition, microstructure observation was conducted on the area including grain boundary to discuss the correlation of magnetization on irradiated austenitic stainless alloy and grain boundary cracking. Obtained magnetic data on irradiated type304 stainless steel were seen clearly different from that on un-irradiated specimen, and showed positive correlation with radiation dose, therefore it was thought that magnetic measurement technics can be applied for the material which contains certain quantity of ferrite phase before irradiation. In the microstructural observation, magnetic phase (FeNi
) formation along the grain boundary was revealed.
Tani, Norio; Adachi, Toshikazu*; Someya, Hirohiko*; Watanabe, Yasuhiro; Sato, Hikaru*; Kishiro, Junichi
IEEE Transactions on Applied Superconductivity, 14(2), p.421 - 424, 2004/06
Times Cited Count：13 Percentile：54.64The 3-GeV synchrotron proposed in the JAERI/KEK Joint Project (J-PARC) is a rapid-cycling synchrotron (RCS), which accelerates a high-intensity proton beam from 400-MeV to 3-GeV at a repetition rate of 25-Hz. The 3-GeV synchrotron is used to produce pulsed spallation neutrons and muons. Since the magnets for the 3-GeV synchrotron are required to have a large aperture in order to realize the large beam power of 1 MW, there is a larger fringe field at a pole end than a usual synchrotron magnet. In addition, 25-Hz ac field induces an eddy current in magnet components, magnet end plates and etc. The eddy current induced in the end plates is expected to be large. Therefore, it is important to investigate an effect of large leakage field and eddy current to the beam motion around the magnet end part. We have measured the eddy loss and the eddy field at the edges of the dipole and quadrupole magnets. In this paper, we report the comparison between the results of the measurements and the two-dimensional eddy current model developed for this study.
Tani, Norio; Kanazawa, Kenichiro; Shimada, Taihei; Suzuki, Hiromitsu; Watanabe, Yasuhiro; Adachi, Toshikazu*; Someya, Hirohiko*
Proceedings of 8th European Particle Accelerator Conference (EPAC 2002), p.2376 - 2378, 2002/00
The 3-GeV synchrotron proposed in the JAERI/KEK Joint Project is a rapid-cycling synchrotron (RCS), which accelerates a high-intensity proton beam from 400 MeV to 3 GeV at a repetition rate of 25 Hz. The 3-GeV synchrotron is used to produce pulsed spallation neutrons and muons. It also works as an injector for a 50-GeV synchrotron. Since the magnets for the 3-GeV synchrotron are required to have a large aperture in order to realize the large beam power of 1 MW, there is a large leakage field at an end part than a usual synchrotron magnet. In addition, 25-Hz ac field induces an eddy current in magnet components: e.g. a coil, magnet end plates and etc. We intend to use a stranded conductor as a coil conductor so that the eddy current induced in the coil can be reduced. On the other hand, the eddy current induced in the end plates is expected to be large. Therefore, it is important to investigate an effect of the large leakage field and the eddy current to the beam motion around the magnet end part. We have constructed a prototype dipole magnet and field measurement system for this purpose. This paper reports the results of the design and the preliminary test about this magnet.
A.Gilanyi*; Akiba, Masato; Okumura, Yoshikazu; Sugimoto, Makoto; Takahashi, Yoshikazu; Tsuji, Hiroshi
JAERI-Research 99-014, 71 Pages, 1999/03
JAERI-Research-99-014.pdf:3.56MB
no abstracts in English
Senda, Ikuo*; Shoji, Teruaki; Tsunematsu, Toshihide; *; Fujieda, Hirobumi*
Nuclear Fusion, 37(8), p.1129 - 1145, 1997/00
Times Cited Count：9 Percentile：33.78(Physics, Fluids & Plasmas)no abstracts in English
Araki, Masanori; Sato, Kazuyoshi; ; Akiba, Masato
Fusion Technology, 30(3), p.674 - 679, 1996/12
no abstracts in English
Koizumi, Koichi; Yamazaki, Kozo*
Purazuma, Kaku Yugo Gakkai-Shi, 72(12), p.1352 - 1361, 1996/12
no abstracts in English
; *; Ara, Katsuyuki
JAERI-Research 96-058, 25 Pages, 1996/10
JAERI-Research-96-058.pdf:0.99MB
no abstracts in English
Nakamura, Yukiharu; Yoshino, Ryuji; N.Pomphrey*; S.C.Jardin*
Journal of Nuclear Science and Technology, 33(8), p.609 - 619, 1996/08
Times Cited Count：8 Percentile：58.77(Nuclear Science & Technology)no abstracts in English
*; Komatsuzaki, Manabu*; Nishio, Satoshi; Koizumi, Koichi; Takatsu, Hideyuki
JAERI-Tech 96-031, 16 Pages, 1996/07
no abstracts in English
Senda, Ikuo*; Shoji, Teruaki; *; Fujieda, Hirobumi*; Tsunematsu, Toshihide
JAERI-Tech 96-016, 23 Pages, 1996/03
no abstracts in English
Nishio, Satoshi; Miura, H.*; *
International Journal of Applied Electromagnetics and Mechanics, 6, p.37 - 54, 1995/00
no abstracts in English
Ishihara, Masahiro; Iyoku, Tatsuo; *
JCOSSAR95 Rombunshu, 0, p.199 - 206, 1995/00
no abstracts in English
Ishihara, Masahiro; Saikusa, Akio; Iyoku, Tatsuo; Shiozawa, Shusaku; Ooka, Norikazu; *; *
JAERI-M 93-252, 39 Pages, 1994/01
no abstracts in English
Inagaki, Yoshiyuki; ; *; *; *
Nuclear Technology, 104, p.106 - 117, 1993/10
Times Cited Count：2 Percentile：29.79(Nuclear Science & Technology)no abstracts in English
Ishihara, Masahiro; Saikusa, Akio; Iyoku, Tatsuo; Shiozawa, Shusaku; Ooka, Norikazu; *; *; *; *; *
JAERI-M 93-197, 44 Pages, 1993/09
no abstracts in English
Inagaki, Yoshiyuki; ; *; *
Nihon Genshiryoku Gakkai-Shi, 35(3), p.227 - 236, 1993/03
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Inagaki, Yoshiyuki; ; *; *; *; *
JAERI-M 92-151, 49 Pages, 1992/10
no abstracts in English
D.A.Humphreys*; Yoshino, Ryuji
JAERI-M 92-069, 25 Pages, 1992/05
no abstracts in English
Neyatani, Yuzuru; Ushigusa, Kenkichi; Matsukawa, Makoto; Ninomiya, Hiromasa
Proc. of the 1992 Int. Conf. on Plasma Physics,Vol. 16C,Part 1, p.I447 - I450, 1992/00
no abstracts in English
