研究者詳細 - 大野　哲靖

論文 - 大野　哲靖

分割表示 657 件中 221 - 240 件目／全件表示 >>

Surface modification of titanium using He plasma 査読有り

S.Kajita, D.Kitaoka, N.Ohno, R.Yoshihara, N.Yoshida, T.Yoshida

Applied Surface Science 303 巻頁： 438-445 2014年3月

Thermal response of nanostructured tungsten 査読有り

S.Kajita, G.De Temmerman, T.Morgan, S.van Eden, T. de Kruif, N.Ohno

Nuclear Fusion 54 巻頁： 033005(10 pp) 2014年2月

Helium plasma irradiation on single crystal tungsten and undersized atom doped tungsten alloys 査読有り国際誌

Kajita Shin, Yoshida Naoaki, Ohno Noriyasu, Hirahata Yuki, Yoshihara Reiko

PHYSICA SCRIPTA 89 巻 ( 2 ) 2014年2月

Optical design for divertor Thomson scattering system for JT-60SA 査読有り

S.Kajita, A.Enokuchi, T.Hatae, K.Itami, T.Hamano, S.Kado, N.Ohno, N.Takeyama

Fusion Engineering and Design 89 巻 ( 1 ) 頁： 69-76 2014年1月

Helium plasma irradiation on single crystal tungsten and undersized atom doped tunsten alloys 査読有り

S.Kajita, N.Yoshida, N.Ohno, Y.Hirahata, R.Yoshihara

Phys. Scr. 89 巻頁： 025602(7 pp) 2014年1月

Modified Power Transmission Factor of Tungsten in Plasmas with Hot Electron Component 査読有り

S.Takamura, S.Ono, N.Ohno

Contrib. Plasma Phys. 54 巻 ( 4-6 ) 頁： 474-478 2014年

Transition in velocity and grouping of arc spot on different nanostructured tungsten electrodes 査読有り

Hwangbo D.

Results in Physics 4 巻頁： 33 - 39 2014年

Spectroscopic Study and Motion Analysis of Arc Spot Initiated on Nanostructured Tungsten 査読有り

D.Hwangbo, S.Kajita, M.Osaka, N.Ohno

Jpn. J. Appl. Phys. 52 巻頁： 11NC02(6 pp) 2013年11月

Low-energy helium irradiation on in-vessel mirror materials 査読有り

S.Kajita, M.Tokitani, T.Saeki, N.Ohno, N.Yoshida

Journal of Nuclear Materials 442 巻 ( 1-3, Supplement 1 ) 頁： S515-S519 2013年11月

Properties of deposited layer formed by interaction with Be seede D-He mixture plasma and tungsten 査読有り

K.Tokunaga, M.J.Baldwin, D.Nishijima, R.P.Doerner, S.Nagata, B.Tsuchiya, H.Kurishita, T.Fujiwara, K.Araki, Y.Miyamoto, N.Ohno, Y.Ueda

Journal of Nuclear Materials 442 巻 ( 1-3 ) 頁： S313-S319 2013年11月

Helium effects on tungsten surface morphology and deuterium retention 査読有り

Y.Ueda, H.Y.Peng, H.T.Lee, N.Ohno, S.Kajita, N.Yoshida, R.Doerner, G.De Temmerman, V.Alimov, G.Wright

Journal of Nuclear Materials 442 巻 ( 1-3 ) 頁： S267-S272 2013年11月

Characterization of Gun Plasma Penetrated into a Steady State Plasma Device 査読有り

S.Kajita, T.Akiyama, T.Nihashi, M.Osaka, N. Ohno, Y.Kikuchi, I.Sakuma, M.Nagata

IEEE TRANSACTIONS ON PLASMA SCIENCE 41 巻 ( 11 ) 頁： 3122-3128 2013年11月

Field emission property of nanostructured tungsten formed by helium plasma irradiation 査読有り

Kajita S.

Fusion Engineering and Design 88 巻 ( 11 ) 頁： 2842 - 2847 2013年11月

Progress of the JT-60SA project 査読有り国際共著国際誌

Kamada Y., Barabaschi P., Ishida S., Abdel Maksoud W., Aiba N., Akino N., Akiyama T., Alonso J., Angioni C., Arai T., Arakawa H., Ardellier F., Artaud J., Asakawa S., Asakura N., Ashikawa N., Balaguer D., Barbato E., Barrera G., Baruzzo M., Baulaigue O., Bayetti P., Bécoulet M., Benkadda S., Benoit F., Besi U., Beurskens M., Boccaccini L., Bolzonella T., Borba D., Botija J., Bourdelle C., Brolatti G., Bruschi A., Bucalossi J., Cara P., Challis C., Chantant M., Chapman I., Chesny P., Chiba S., Ciayznski D., Cismondi F., Cocilovo V., Coletti R., Coletti A., Collins B., Conway G., Corato V., Costa P., Cucchiaro A., Dael A., Davis S., Day C., De Baar M., Decool P., Della Corte A., Delrez C., De Vries P., Decker J., Di Zenobio A., Di Pace L., Di Pietro E., Disset G., Donati A., Douai D., Dougnac H., Drotziger S., Duchateau J.L., Duglue D., Dumas N., Ejiri A., Endo Y., Farina D., Fernandez P., Ferro A., Fietz W., Figini L., Fslchetto G., Fujita T., Fukuda T., Fukumoto M., Fukuyama A., Furukawa M., Furukawa M., Gaio E., Garcia J., Garzotti L., Gauthier E., Genini L., Geraud A., Ginoulhiac G., Giruzzi G., Gomez Carrasco B., Gonde R., Goniche M., Gouat P., Gros G., Haga S.

Nuclear Fusion 53 巻 ( 10 ) 2013年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Fusion

The JT-60SA project implemented by Japan and Europe is progressing on schedule towards the first plasma in March 2019. After careful R&D, procurements of the major components have entered their manufacturing stages. In parallel, disassembly of JT-60U has been completed on time, and the JT-60SA tokamak assembly is expected to start in January 2013. The JT-60SA device, a highly shaped large superconducting tokamak with a variety of plasma control actuators, has been designed in order to contribute to ITER and to complement ITER in all the major areas of fusion plasma development necessary to decide DEMO reactor construction. Detailed assessments and prediction studies of the JT-60SA plasma regimes have confirmed these capabilities: using ITER- and DEMO-relevant plasma regimes, heating conditions, and its sufficiently long discharge duration, JT-60SA enables studies on magnetohydrodynamic stability at high beta, heat/particle/momentum transport, high-energy ion physics, pedestal physics including edge localized mode control, and divertor physics. By integrating these studies, the project provides 'simultaneous and steady-state sustainment of the key performance characteristics required for DEMO' with integrated control scenario development.

DOI： 10.1088/0029-5515/53/10/104010

Scopus

Control of 3D edge radiation structure with resonant magnetic perturbation fields applied to the stochastic layer and stabilization of radiative divertor plasma in LHD 査読有り

M. Kobayashi, S. Masuzaki, I. Yamada, Y. Narushima, C. Suzuki, N. Tamura, B. J. Peterson, S. Morita, C. F. Dong, N. Ohno, S. Yoshimura, Y. Feng, M. Goto, K. Sato, T. Akiyama, K. Tanaka

Nuclear Fusion 53 巻 ( 9 ) 2013年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Fusion

It is found that resonant magnetic perturbation (RMP) fields have a stabilizing effect on the radiating edge plasma, realizing stable sustainment of radiative divertor (RD) operation in the Large Helical Device (LHD). Without RMP, thermal instability leads to radiative collapse. Divertor power load is reduced by a factor of 3-10 during the RMP-assisted RD phase, while maintaining relatively good core plasma confinement with confinement enhancement factor . It has also been demonstrated that the RMP field itself can initiate transition to RD operation by increasing perturbation strength, while keeping constant density and injection power. The results show a possibility of a new control knob for divertor power load in a 3D magnetic field configuration. It is also found that after the transition to RD, the energy confinement enhancement factor based on ISS04 scaling increases by a factor of 1.4 compared with the attached phase. The operation range of the RMP-assisted RD is identified in terms of RMP strength and radial location of the resonance layer of the RMP. A 3D edge radiation structure is analysed using the edge transport code EMC3-EIRENE and the results are compared with experiments. The comparison indicates that the application of RMP modulates the 3D edge radiation structure such that an intense radiation appears around the X-point of the m/n = 1/1 island in the case with RMP, while it is located at the inboard side without RMP. © 2013 IAEA, Vienna.

DOI： 10.1088/0029-5515/53/9/093032

Scopus

Growth Annealing Equilibrium of Tungsten Nanostructures by Helium Plasma Irradiation in Non Eroding Regimes 査読有り

S.Kajita, N.Ohno, M.Yajima, J.Kato

Journal of Nuclear Materials 440 巻 ( 1-3 ) 頁： 55-62 2013年9月

Influence of crystal orientation on damages of tungsten exposed to helium plasma 査読有り

N.Ohno, Y.Hirahata, M.Yamagiwa, S.Kajita, M.Takagi, N.Yoshida, R.Yoshihara, T.Tokunaga, M.Tokitani

Journal of Nuclear Materials 438 巻頁： S879-S882 2013年7月

Study of Hydrogen Isotopes Behavior in Carbon Based Materials with In-Situ Ion Beam Analysis under Plasma Exposure 査読有り

Y.Nakamura, M.Yamagiwa, T.Kaneko, N.Matsunami, N.Ohno, S.Kajita, M.Takagi, M.Tokitani, S.Masuzaki

Journal of Nuclear Materials 438 巻頁： S1036-S1039 2013年7月

Tritium retention in nanostructured tungsten with large effective surface area 査読有り

M.Yajima, Y.Hatano, S.Kajita, J.Shi, M.Hara, N.Ohno

Journal of Nuclear Materials 438 巻頁： S1142-S1145 2013年7月

Enhancement of multi-pulse laser induced damage threshold on Cu mirror under vacuum condition 査読有り

S.Kajita, R.Yasuhara, M.Sato, N.Ohno, M.Tokitani, N.Yoshida

Optics Express 21 巻 ( 14 ) 頁： 17275-17284 2013年7月

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