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Journal Articles

Experimental evaluation of neutron absorption grating fabricated by oblique evaporation of gadolinium for phase imaging

Seki, Yoshichika; Shinohara, Takenao; Ueno, Wakana; Parker, J. D.*; Samoto, Tetsuo*; Yashiro, Wataru*; Momose, Atsushi*

Physics Procedia, 88, p.217 - 223, 2017/00

 Times Cited Count:8 Percentile:97.89

Journal Articles

Photoemission and X-ray absorption studies of valence states in (Ni,Zn,Fe,Ti)$$_3$$O$$_4$$ thin films exhibiting photoinduced magnetization

Kobayashi, Masaki*; Oki, Yasuhiro*; Takizawa, Masaru*; Song, G. S.*; Fujimori, Atsushi; Takeda, Yukiharu; Terai, Kota*; Okane, Tetsuo; Fujimori, Shinichi; Saito, Yuji; et al.

Applied Physics Letters, 92(8), p.082502_1 - 082502_3, 2008/02

 Times Cited Count:12 Percentile:46.79(Physics, Applied)

Journal Articles

Extended steady-state and high-beta regimes of net-current free heliotron plasmas in the Large Helical Device

Motojima, Osamu*; Yamada, Hiroshi*; Komori, Akio*; Oyabu, Nobuyoshi*; Muto, Takashi*; Kaneko, Osamu*; Kawahata, Kazuo*; Mito, Toshiyuki*; Ida, Katsumi*; Imagawa, Shinsaku*; et al.

Nuclear Fusion, 47(10), p.S668 - S676, 2007/10

 Times Cited Count:34 Percentile:76.72(Physics, Fluids & Plasmas)

The performance of net-current free heliotron plasmas has been developed by findings of innovative operational scenarios in conjunction with an upgrade of the heating power and the pumping/fuelling capability in the Large Helical Device (LHD). Consequently, the operational regime has been extended, in particular, with regard to high density, long pulse length and high beta. Diversified studies in LHD have elucidated the advantages of net-current free heliotron plasmas. In particular, an internal diffusion barrier (IDB) by a combination of efficient pumping of the local island divertor function and core fuelling by pellet injection has realized a super dense core as high as 5$$times$$10$$^{20}$$ m$$^{-3}$$, which stimulates an attractive super dense core reactor. Achievements of a volume averaged beta of 4.5% and a discharge duration of 54 min with a total input energy of 1.6 GJ (490 kW on average) are also highlighted. The progress of LHD experiments in these two years is overviewed by highlighting IDB, high-beta and long pulse.

Journal Articles

Extended steady-state and high-beta regimes of net-current free heliotron plasmas in the large helical device

Motojima, Osamu*; Yamada, Hiroshi*; Komori, Akio*; Oyabu, Nobuyoshi*; Kaneko, Osamu*; Kawahata, Kazuo*; Mito, Toshiyuki*; Muto, Takashi*; Ida, Katsumi*; Imagawa, Shinsaku*; et al.

Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM), 12 Pages, 2007/03

The performance of net-current free Heliotron plasmas has been developed by findings of innovative operational scenarios in conjunction with an upgrade of the heating power and the pumping/fueling capability in the Large Helical Device (LHD). Consequently, the operational regime has been extended, in particular, with regard to high density, long pulse length and high beta. Diversified studies in LHD have elucidated the advantages of net-current free heliotron plasmas. In particular, an Internal Diffusion Barrier (IDB) by combination of efficient pumping of the local island divertor function and core fueling by pellet injection has realized a super dense core as high as 5$$times$$10$$^{20}$$m$$^{-3}$$, which stimulates an attractive super dense core reactor. Achievements of a volume averaged beta of 4.5 % and a discharge duration of 54-min. with a total input energy of 1.6 GJ (490 kW in average) are also highlighted. The progress of LHD experiments in these two years is overviewed with highlighting IDB, high $$beta$$ and long pulse.

Journal Articles

Tritium removal using wall conditioning discharges in JT-60U

Higashijima, Satoru; Nakamura, Hirofumi; Horikawa, Toyohiko*; Kaminaga, Atsushi; Seki, Masami; Kubo, Hirotaka; Konishi, Satoshi; Tanabe, Tetsuo*

Proceedings of 30th EPS Conference on Controlled Fusion and Plasma Physics (CD-ROM), 4 Pages, 2003/00

no abstracts in English

Oral presentation

Development of pulsed neutron phase imaging at RADEN

Seki, Yoshichika; Shinohara, Takenao; Ueno, Wakana; Seeghilaridjani, M.*; Kato, Hidemi*; Samoto, Tetsuo*; Yashiro, Wataru*; Momose, Atsushi*

no journal, , 

no abstracts in English

Oral presentation

Pulsed neutron phase imaging with Talbot-Lau interferometer

Seki, Yoshichika; Shinohara, Takenao; Ueno, Wakana; Parker, J. D.*; Matsumoto, Yoshihiro*; Samoto, Tetsuo*

no journal, , 

no abstracts in English

Oral presentation

Neutron phase imaging with Talbot-Lau interferometer

Seki, Yoshichika; Shinohara, Takenao; Parker, J. D.*; Matsumoto, Yoshihiro*; Hino, Masahiro*; Samoto, Tetsuo*; Yashiro, Wataru*; Momose, Atsushi*

no journal, , 

no abstracts in English

Oral presentation

New designs of Talbot-Lau interferometer at pulsed neutron imaging system RADEN in J-PARC

Seki, Yoshichika; Shinohara, Takenao; Parker, J. D.*; Matsumoto, Yoshihiro*; Samoto, Tetsuo*; Yashiro, Wataru*; Momose, Atsushi*

no journal, , 

9 (Records 1-9 displayed on this page)
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