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He spin filter and small-angle X-ray scatteringRyoki, Akiyuki*; Watanabe, Fumi*; Okudaira, Takuya*; Takahashi, Shingo*; Oku, Takayuki; Hiroi, Kosuke; Motokawa, Ryuhei; Nakamura, Yo*
Journal of Chemical Physics, 160(11), p.114907_1 - 114907_9, 2024/03
Times Cited Count：0Tomiyasu, Keisuke*; Ito, Naoko*; Okazaki, Ryuji*; Takahashi, Yuki*; Onodera, Mitsugi*; Iwasa, Kazuaki*; Nojima, Tsutomu*; Aoyama, Takuya*; Ogushi, Kenya*; Ishikawa, Yoshihisa*; et al.
Advanced Quantum Technologies (Internet), 1(3), p.1800057_1 - 1800057_7, 2018/12
Spin-state transition, also known as spin crossover, plays a key role in diverse systems. In theory, the boundary range between the low- and high-spin states is expected to enrich the transition and give rise to unusual physical states. However, no compound that realizes a nearly degenerate critical range as the ground state without requiring special external conditions has yet been experimentally identified. This study reports that the Sc substitution in LaCoO3 destabilizes its nonmagnetic low-spin state and generates an anomalous paramagnetic state accompanied by the enhancement of transport gap and magneto-lattice-expansion as well as the contraction of Co-O distance with the increase of electron site transfer. These phenomena are not well described by the mixture of conventional low- and high-spin states, but by their quantum superposition occurring on the verge of a spin-state transition.
Ninomiya, Hiromasa; Akiba, Masato; Fujii, Tsuneyuki; Fujita, Takaaki; Fujiwara, Masami*; Hamamatsu, Kiyotaka; Hayashi, Nobuhiko; Hosogane, Nobuyuki; Ikeda, Yoshitaka; Inoue, Nobuyuki; et al.
Journal of the Korean Physical Society, 49, p.S428 - S432, 2006/12
To contribute DEMO and ITER, the design to modify the present JT-60U into superconducting coil machine, named National Centralized Tokamak (NCT), is being progressed under nationwide collaborations in Japan. Mission, design and strategy of this NCT program is summarized.
Oda, Keiji*; Takahashi, Fumiaki; Expert Committee on Concepts of Dosimetric Quantities Used in Radiological protection, Japan Health
Proceedings of 2nd Asian and Oceanic Congress Radiological Protection (AOCRP-2) (CD-ROM), p.52 - 55, 2006/10
no abstracts in English
Sato, Kazuyoshi; Uehara, Masaharu*; Tamura, Kosaku*; Hashimoto, Masayoshi*; Ogino, Shunji*; Yagenji, Akira; Nagamatsu, Nobuhide*; Sekiya, Shigeki*; Takahashi, Hideo*; Motohashi, Keiichi*; et al.
JAEA-Technology 2006-024, 114 Pages, 2006/03
JAEA-Technology-2006-024.pdf:24.72MB
no abstracts in English
Sato, Kazuyoshi; Hashimoto, Masayoshi*; Nagamatsu, Nobuhide*; Yagenji, Akira; Sekiya, Shigeki*; Takahashi, Hideo*; Motohashi, Keiichi*; Ogino, Shunji*; Kataoka, Takahiro*; Ohashi, Hironori*; et al.
JAEA-Technology 2006-006, 587 Pages, 2006/03
JAEA-Technology-2006-006.pdf:46.04MB
no abstracts in English
Kikuchi, Mitsuru; Tamai, Hiroshi; Matsukawa, Makoto; Fujita, Takaaki; Takase, Yuichi*; Sakurai, Shinji; Kizu, Kaname; Tsuchiya, Katsuhiko; Kurita, Genichi; Morioka, Atsuhiko; et al.
Nuclear Fusion, 46(3), p.S29 - S38, 2006/03
Times Cited Count：13 Percentile：41.68(Physics, Fluids & Plasmas)The National Centralized Tokamak (NCT) facility program is a domestic research program for advanced tokamak research to succeed JT-60U incorporating Japanese university accomplishments. The mission of NCT is to establish high beta steady-state operation for DEMO and to contribute to ITER. The machine flexibility and mobility is pursued in aspect ratio and shape controllability, feedback control of resistive wall modes, wide current and pressure profile control capability for the demonstration of the high-b steady state.
Tsuchiya, Katsuhiko; Akiba, Masato; Azechi, Hiroshi*; Fujii, Tsuneyuki; Fujita, Takaaki; Fujiwara, Masami*; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; et al.
Fusion Engineering and Design, 81(8-14), p.1599 - 1605, 2006/02
Times Cited Count：1 Percentile：9.94(Nuclear Science & Technology)no abstracts in English
plasma operationTamai, Hiroshi; Akiba, Masato; Azechi, Hiroshi*; Fujita, Takaaki; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; Hosogane, Nobuyuki; Ichimura, Makoto*; et al.
Nuclear Fusion, 45(12), p.1676 - 1683, 2005/12
Times Cited Count：15 Percentile：45.44(Physics, Fluids & Plasmas)Design studies are shown on the National Centralized Tokamak facility. The machine design is carried out to investigate the capability for the flexibility in aspect ratio and shape controllability for the demonstration of the high-beta steady state operation with nation-wide collaboration, in parallel with ITER towards DEMO. Two designs are proposed and assessed with respect to the physics requirements such as confinement, stability, current drive, divertor, and energetic particle confinement. The operation range in the aspect ratio and the plasma shape is widely enhanced in consistent with the sufficient divertor pumping. Evaluations of the plasma performance towards the determination of machine design are presented.
Takahashi, Toshiyuki; Research Reactor Utilization Division
JAERI-Review 2004-016, 542 Pages, 2004/08
JAERI-Review-2004-016.pdf:74.07MB
no abstracts in English
Nakahira, Masataka; Takeda, Nobukazu; Takahashi, Hiroyuki*; Yagenchi, Akira*; Akutsu, Yoichi; Tada, Eisuke; Yabana, Shuichi*
Proceedings of 7th International Conference on Nuclear Engineering (ICONE-7) (CD-ROM), 10 Pages, 1999/00
no abstracts in English
Kimura, Toyoaki; Kurihara, Kenichi; Kawamata, Yoichi; Akiba, K.*; ; Terakado, Tsunehisa; Yoshino, Ryuji
Fusion Technology, 32(3), p.404 - 415, 1997/11
no abstracts in English
Kawamata, Yoichi; Kurihara, Kenichi; Kimura, Toyoaki;
JAERI-M 90-005, 30 Pages, 1990/02
no abstracts in English
Kurihara, Kenichi; Kimura, Toyoaki; ; Kawamata, Yoichi; Sakata, Shinya; Akasaka, Hiromi
JAERI-M 90-001, 45 Pages, 1990/02
no abstracts in English
Kurihara, Kenichi; Kimura, Toyoaki; Yonekawa, Izuru; ; Matsukawa, Makoto; ; Kawamata, Yoichi; Totsuka, Toshiyuki; Akasaka, Hiromi; Sakata, Shinya
Fusion Engineering and Design, 11, p.441 - 454, 1990/00
no abstracts in English
; Kimura, Toyoaki; Yonekawa, Izuru; Kurihara, Kenichi; ; ; Hosogane, Nobuyuki; Yoshino, Ryuji; Ninomiya, Hiromasa; Kawamata, Yoichi; et al.
Fusion Engineering and Design, 5, p.69 - 84, 1987/00
Times Cited Count：9 Percentile：66.63(Nuclear Science & Technology)no abstracts in English
; ; ; ; *; ; ;
JAERI-M 86-110, 56 Pages, 1986/08
no abstracts in English
*; *; *; Maruyama, Akira*; Sasaki, Shuichi; *; *
PNC TN242 81-01, 36 Pages, 1981/02
no abstracts in English
Sakurai, Shinji; Masaki, Kei; Shibama, Yusuke; Shinohara, Koji; Suzuki, Yutaka; Sasajima, Tadayuki; Morioka, Atsuhiko; Hayashi, Takao; Takahashi, Ryukichi; Sawai, Tomotsugu; et al.
no journal, ,
In order to reduce Toroidal magnetic Field (TF) ripple in JT-60U, ferritic steel (8Cr-2W-0.2V) armors were installed inside Vacuum Vessel (VV). 55 plates of 8Cr-2W-0.2V were manufactured from 2.6 ton ingots made by 20 ton vacuum induction melting. Saturated magnetization and thermal conductivity are 10-20% lower than those of F82H. Electrical resistivity and tensile properties are similar to those of F82H. 1122 carbon armors were replaced to 8Cr-2W-0.2V with reinforcement of stud nut. The absorbed beam power will be expected to increase 30%. A correction method of additional magnetic flux and field caused by 8Cr-2W-0.2V armors for magnetic probes is proposed for plasma position and shape control. Correction for flux loops is mostly good, but correcting model and program for B
probe need some improvements.
N
thin layer using polarized neutron diffraction measurementsTakeda, Masayasu; Kakurai, Kazuhisa; Sunaga, Kazuyuki*; Tsunoda, Masakiyo*; Takahashi, Migaku*
no journal, ,
A giant magnetic moment which was larger than the saturation magnetization of pure Iron was reported in Fe
N
thin films, but a reliable value of the giant moment has not been experimentally fixed yet. In addition, the origin is still an open question although several models has been proposed. One of them is that 
phase of FeN in which N atoms are ordered in the bct structure is the origin of the giant magnetic moment. It is, however, not supported by the band calculation of this compound. In this talk, polarized neutron diffraction experiments will be reported to determine the accurate magnitude of the saturated magnetic moment of this film.
