研究者詳細 - 大野　哲靖

論文 - 大野　哲靖

分割表示 657 件中 381 - 400 件目／全件表示 >>

High Density Plasma Generation by RF Ohmic Discharge in Toroidal Divertor Simulator NAGDIS-T 査読有り

M.Nagase, H.Masuda, N.Ohno, S.Takamura, M.Takagi

J. Nucl. Mater. 363-365 巻頁： 611-615 2007年

Dynamic Interaction between Disruptive Plasma and Wall in the Small Tokamak HYBTOK-II 査読有り

M.Okamoto, T.Yamada, T.Hiraishi, Y.Kikuchi, N.Ohno, S.Takamura

J. Nucl. Mater. 363-365 巻頁： 1076-1080 2007年

Alleviation of Damaged Tungsten Having Helium Holes/Bubbles by Use of Transient Heat Load 査読有り

S.Kajita, S.Takamura, N.Ohno, T.Nishimoto

Plasma Fusion Research 2 巻頁： 9 2007年

Plasma-surface Interaction, Scrape-off Layer and Divertor Physics: Implications for ITER 査読有り

B.Lipschultz, X.Bonnin, G.Counsell, A.Kallenbach, A.Kukushkin, K.Krieger, A.Leonard, A.Loarte, .Neu, R.A.Pitts, T.Rognlien, J.Roth, C.Skinner, J.L.Terry, E.Tsitrone, D.Whyte, S.Zweben, N.Asakura, D.Coster, R.Doerner, R.Dux, G.hendrih, A.Herrmann, J.Hu, S.Krasheninnikov, G.Kirnev, A.Kreter, V.Kurnaev, B.LaBombard, S.Lisgo, T.Nakano, N.Ohno, H.D.Pacher, J.Paley, Y.Pan, G.Pautasso, V.Philipps, V.Rohde, D.Rudakov, P.Stangeby, S.Takamura, T.Tanabe, Y.Yang, S.Zhu

Nuclear Fusion 47 巻頁： 1189-1205 2007年

Extended Steady-state and High-beta Regimes of Net-current Free Heliotron Plasmas in the Large Helical Device 査読有り

O.Motojima, H.Yamada, A.Komori, N.Ohyabu, T.Mutoh, O.Kaneko, K.Kawahata, T.Mito, K.Ida, S.Imagawa, Y.Nagayama, T.Shimozuma, K.Y.Watanabe, S.Masuzaki, J.Miyazawa, T.Morisaki, S.Morita, S.Ohdachi, N.Ohno, K.Saito, S.Sakakibara, Y.Takeiri, N.Tamura, K.Toi, M.Tokitani, M.Yokoyama, M.Yoshinuma, K.Ikeda, A.Isayama, K.Ishii S.Kubo, S.Murakami, K.Nagasaki, T.Sekim K.Takahata, H.Takenaga and the LHD Experimental Group

Nuclear Fusion 47 巻頁： S668-S676 2007年

Alleviation of Helium Holes/Bubbles on Tungsten Surface by Use of Transient Heat Load 査読有り国際誌

KAJITA Shin, TAKAMURA Shuichi, OHNO Noriyasu, NISHIMOTO Tentaro

Plasma and Fusion Research ( 2 ) 頁： 9 - 9 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：社団法人プラズマ・核融合学会

The alleviation effect of transient heat load on helium holes/bubbles has been demonstrated using ruby laser pulses for the transient heat source in the divertor simulator NAGDIS-II. It is shown that the holes and bubbles disappeared following the irradiation of the ruby laser pulses, while the surface roughness was significantly enhanced by the irradiation of the Nd:YAG laser pulses. Based on the numerically calculated temperature in the specimen, the physical mechanism causing this difference is discussed particularly in terms of pulse width (0.6 ms for ruby laser without a Q-switch and 5 ns for Nd:YAG laser with a Q-switch).

DOI： 10.1585/pfr.2.009

Plasma response on penetration of external rotating helical magnetic field in HYBTOK-II tokamak edge plasma 査読有り国際誌

Budaev V.P., Pankratov I.M., Takamura S., Ohno N., Kajita S., Takagi M., Matsuno H., Okamoto M., Hosoi S., Hasebe Y., Yamada T., Omelchenko A.Y., Olshansky V.V.

33rd EPS Conference on Plasma Physics 2006, EPS 2006 2 巻頁： 1548 - 1551 2006年12月

Intermittency in laboratory and space plasmas: Comparative study of multifractal statistics 査読有り国際共著国際誌

Budaev V., Savin S., Zelenyi L., Takamura S., Ohno N., Shevyrev N.

33rd EPS Conference on Plasma Physics 2006, EPS 2006 1 巻頁： 344 - 347 2006年12月

Reduction of laser power threshold for melting tungsten due to subsurface helium holes 査読有り国際誌

Kajita Shin, Nishijima Dai, Ohno Noriyasu, Takamura Shuichi

JOURNAL OF APPLIED PHYSICS 100 巻 ( 10 ) 2006年11月

Modification of the damping rate of the oscillations of a dust particle levitating in a plasma due to the delayed charging effect 査読有り国際共著国際誌

Pustylnik M.Y., Ohno N., Takamura S., Smirnov R.

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 74 巻 ( 4 ) 2006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：Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

Dependence of the damping rate of the oscillations of the dust particles levitating in the sheath on the plasma parameters is investigated both theoretically and experimentally. Significant deviations of the damping rate from the values predicted by the Epstein formula are found in the experiment. The delayed charging effect is applied for the theoretical explanation of the experimental results. Qualitative agreement between the theoretical and experimental data is obtained. © 2006 The American Physical Society.

DOI： 10.1103/PhysRevE.74.046402

Scopus

Superdiffusion and multifractal statistics of edge plasma turbulence in fusion devices 査読有り国際共著国際誌

Budaev V.P., Takamura S., Ohno N., Masuzaki S.

Nuclear Fusion 46 巻 ( 4 ) 2006年4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 edge plasma turbulence in the T-10 tokamak, the HYBTOK-II tokamak, the linear machine NAGDIS-II and the Large Helical Device have been studied. The fluctuations in the plasma density have been analysed in terms of the multifractal formalism revisited with wavelets. In most of the cases considered, the edge density fluctuations demonstrate multifractal statistics, i.e. the scaling behaviour of the absolute moments is described by a convex function with non-trivial self-similarity properties. The multifractality factor defined in the multiplicative cascade model is a relevant parameter for characterizing the edge plasma turbulence. The multiplicative cascade process has a 'coarse' time scale T ∼ 50-200 ms iterating towards finer scales. This time scale is referred to as an integral correlation scale. The self-similarity parameters have been observed to depend on the edge plasma condition. The correlation and transport properties have been analysed regarding the multifractality parameter. The diffusion transport coefficient in an edge plasma is not a trivial function of multifractality parameters. © 2006 IAEA, Vienna.

DOI： 10.1088/0029-5515/46/4/S10

Scopus

Comparison of HeI Line Intensity Ratio Method and Electrostatic Probe for Electron Density and Temperature Measurements in NAGDIS-II 査読有り

S.Kajita, N.Ohno, S.Takamura, T.Nakano

Physics of Plasmas 13 巻頁： 013301(9pages) 2006年1月

Charactersitics of rf inductive plasma in oxy-combustion

Yugo Osaka, Noriyuki Kobayashi, M.A.Razzak, Noriyasu Ohno, Shuichi Takamura

The 4th International Conference on Combustion, Incineration/Pyrolysis and Emission Control, September 26-29, 2006, Kyoto, Japan 1 巻 2006年

Fundamental research on plasma-assisted combustion by applying rf power

Yugo Osaka, Noriyuki Kobayashi, M.A.Razzak, Noriyasu Ohno, Shuichi Takamura

11th Asian Pacific Confederation of Chemical Engineering Congress, August 27-30, 2006 Kuala Lumpur, Malaysia 1 巻 2006年

Dust Formation and Transport in the Divertor Plasma Simulators

N.Ohno, M.Miyoshi, T.Yamada, M.Pustylnik, S.Kajita, S.Takamura

7th Workshop ont Fine Particle Plasma, NIFS, oki, Japan December, 15-16, 2006(招待講演) 1 巻 2006年

Two-dimensional measurement of plasma dynamics with an ICCD fast camera based on HeI line intensity ratio method

N.Yamamoto, K.Miyamoto, K.Kitagawa, S.Kajita, M.Okamoto, N.Ohno

16th International Toki Conference on Advanced Imaging and Plasma Diagnostics, Toki, Gifu, Japan, Dec. 5-8, 2006 頁： 6-15 2006年

Imaging of tungsten impurity ejected from damaged material due to transient heat load

S.Kajita, N.Ohno, S.Takamura

16th International Toki Conference on Advanced Imaging and Plasma Diagnostics, Toki, Gifu, Japan, Dec. 5-8, 2006 頁： 4-01 2006年

ELM Propagation and Fluctuations Characteristics in H- and L-mode SOL Plasmas on JT-60U

N.Asakura, N.Ohno, H.Kawashima, H.Miyoshi, G.Matsunaga, N.Oyama, S.Takamura, Y.Uesugi, M.Takechi, T.Nakano, H.Kubo

21st IAEA Fusion Energy Conference, Chengdu, China, Oct. 16-21, 2006 頁： EX/9-2 2006年

Integrated View of Disruption Dynamics on Internal Electromagnetic and Plasma Structures in the small tokamak HYBTOK-II

M.Okamoto, S.Takamura,N.Ohno, S.Kajita, Y.Kikuchi, Y.Uesugi, T.Ozeki, Y.Kawano, M.Sugihara

21st IAEA Fusion Energy Conference, Chengdu, China, Oct.16-21,2006 頁： EX/P8-14 2006年

Super Dense Core Plasma due to Internal Diffusion Barrier in LHD

N.Ohyabu, .Morisaki, S.Masuzaki, R.Sakamoto, M.Kobayashi, J.Miyazawa, M.SHoji, T.Akiyama, N.Ashikawa, M.Emoto, H.Funaba, P.Goncharov, M.Goto, J.H.Harris, Y.Hirooka, K.Ichiguchi, T.Ido, K.Itoh, H.Igami, K.Ikeda, S.Inagaki, H.KAsahara, T.Kobuchi, S.Kubo, R.Kumazawa, S.Morita, S.Muto, K.Nagaoka, N.Nakajima, Y.Nakamura, H.Nakanishi, K.Nariharam Y.Narushima, M.Nishiura, T.Notake, S.Ohdachi, N.Ohno, Y.Oka, M.Osakabe, T.Ozaki, B.J.Peterson, K.Saito, S.Sakakibara, R.Sanchez, H.Sanuki, K.Sato, T.Seki, A.SHimizu, H.SUgama, C.Suzuki, Y.Suzuki, Y.Takeiri, K.Tanaka, N.Tamura, K.TOi, T.Tokuzawa, S.TOda, K.Tsumori, I.Yamada, O.Yamagishi, M.Yokoyama, S.Yoshimura, Y.Yoshimura, M.Yoshinuma, K.Ida, T.Shimozuma, K.Y.Watanabe, Y.Nagayama, O.Kaneko, T.Mutoh, K.Kawahata, H.Yamada, A.Komori, S.Sudo, O.Motojima

21st IAEA Fusion Energy Conference, Chengdu, China, Oct.16-21, 2006 頁： EX/8-1 2006年

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