研究者詳細 - 大野　哲靖

論文 - 大野　哲靖

分割表示 657 件中 481 - 500 件目／全件表示 >>

Response to Comment on "Dynamic Behaviours of Dust Particles in the Plasma Sheath Boundary" 査読有り

S.Takamura, N.Ohno, T.Misawa, S.Nunomura

Physics of Plasmas 9 巻頁： 1060-1061 2002年

Characteristics of Detached Plasmas Associated with Electron-Ion and Molecular Assisted Recombination in NAGDIS-II 査読有り

D.Nishijima, U.Wenzel, K.Ohsumi, N.Ohno, Y.Uesugi, S.Takamura

Plasma Physics Controlled Fusion 44 巻頁： 597-610 2002年

Parametric Excitation of a Dust Particle Trapped in a Plasma-Sheath Boundary 査読有り

N.Ohno, M.Sawai, T.Misawa, K.Asano, S.Takamura

Physica Scripta T98 巻頁： 81-86 2002年

Analysics of Detached Recombining Plasmas by Collisional-Radiative Model with Energetic Electron Component 査読有り

N.Ohno, M.Motoyama, S.Takamura

Contrib. Plasma Physics 42 巻頁： 419-424 2002年

Heat Pulse in a Simulated Divertor Plasmas

Y.Uesugi, S.Takamura, K.Ohsumi, N.Ohno, D.Nishijima

29th EPS Conference on Contr. Fusion and Plasma Phys., Montroux, Switzerland, 17-21 June 2002 ECA 26B 巻頁： 1.087 2002年

26aB13P 低エネルギー・高粒子束ヘリウムプラズマのタングステンへの照射(真空・第一壁・材料) 査読有り

西島大, 叶民友, 大野哲靖, 高村秀一

プラズマ・核融合学会年会予稿集 ( 19 ) 2002年

Analysis of detached recombining plasmas by collisional-radiative model with energetic electron component 査読有り国際誌

Ohno N, Motoyama M, Takamura S

CONTRIBUTIONS TO PLASMA PHYSICS 42 巻 ( 2-4 ) 頁： 419 - 424 2002年

28pB09 空間電荷制限領域におけるプラズマと接する固体表面からの熱電子放出の実験的評価(真空・第一壁・材料) 査読有り

萩野喜晴, 叶民友, 大野哲靖, 高村秀一

プラズマ・核融合学会年会予稿集 ( 19 ) 2002年

26pA07 交流トカマク放電によるプラズマ熱流を用いた熱電子放出(プラズマ基礎・応用II) 査読有り

真鍋俊治, 小島寛樹, 福澤祐馬, 大野哲靖, 高村秀一

プラズマ・核融合学会年会予稿集 ( 19 ) 2002年

26aB18P 移動表面式プラズマ対向機器による粒子制御の原理検証実験(真空・第一壁・材料) 査読有り

廣岡慶彦, 福島宝寿, 大野哲靖, 高村秀一

プラズマ・核融合学会年会予稿集 ( 19 ) 2002年

直線型プラズマ装置を用いた高融点金属材料の損耗・再堆積モデル実験査読有り

大野哲靖, 高村秀一

プラズマ・核融合学会誌 = Journal of plasma and fusion research 77 巻 ( 9 ) 頁： 864 - 868 2001年9月

担当区分：筆頭著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：プラズマ・核融合学会

Erosion and redeposition processes of molybdenum, a high-Z material, were investigated in the linear plasma device TPD-I. Comparison between the experimental results and numerical analysis with a 3D Monte Carlo simulation code indicated that the observed erosion profile could be explained by taking account of the effect of prompt redeposition of high-Z material.

Static and dynamic behaviour of plasma detachment in the divertor simulator experiment NAGDIS-II 査読有り国際共著国際誌

Ohno N., Nishijima D., Takamura S., Uesugi Y., Motoyama M., Hattori N., Arakawa H., Ezumi N., Krasheninnikov S., Pigarov A., Wenzel U.

Nuclear Fusion 41 巻 ( 8 ) 頁： 1055 - 1065 2001年8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

A comprehensive investigation has been performed of the static and dynamic behaviour of detached recombining plasmas in the linear divertor plasma simulator NAGDIS-II. For stationary plasma detachment, the transition from electron ion recombination (EIR) to molecular activated recombination (MAR) has been observed by injecting hydrogen gas into high density helium plasmas. The particle loss rate due to MAR is found to be comparable to that of EIR. Experiments have also been performed by the injection of a plasma heat pulse produced by RF heating into the detached helium plasma to demonstrate the dynamic behaviour of volumetric plasma recombination. Negative spikes in the Balmer series line emission were observed and found to be similar to the so called negative ELM observed in tokamak divertors. Observed Balmer spectra were analysed in detail using the collisional-radiative model. A rapid increase of the ion flux to the target plate was observed associated with the re-ionization of the highly excited atoms generated by EIR.

DOI： 10.1088/0029-5515/41/8/309

Scopus

Evidence for the importance of radial transport in plasma detachment in the Nagoya University Divertor Simulator (NAGDIS-II) 査読有り国際誌

Hollmann E., Whyte D., Nishijima D., Ohno N., Uesugi Y., Ezumi N.

Physics of Plasmas 8 巻 ( 7 ) 頁： 3314 - 3320 2001年7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：Physics of Plasmas

Measurements of ion and electron temperatures have been performed in detaching helium -hydrogen plasmas in a linear divertor simulator experiment using spectroscopy, a Langmuir probe, and an omegatron mass spectrometer. Detachment in these plasmas is characterized by a significant (≈20×) reduction in the central plasma flux at the target plate as the target region neutral pressure is increased from 2 to 12 mTorr. The data indicate that partially detached gas-target plasmas consist of a hot (Te≈5 eV) core region along the axis of the plasma column, surrounded by a cold (Te ≈0.1 eV) halo region of recombining plasma. At Te = 5 eV, plasma recombination is negligible compared with ionization; these experiments therefore provide evidence that detachment is primarily caused by radial transport and by a gradual drop in the ionization source as the temperature of the core region drops below 5 eV. © 2001 American Institute of Physics.

DOI： 10.1063/1.1372664

Scopus

Dynamic behavior of detached recombining plasmas during ELM-like plasma heat pulses in the divertor plasma simulator NAGDIS-II 査読有り国際誌

Uesugi Y, Hattori N, Nishijima D, Ohno N, Takamura S

JOURNAL OF NUCLEAR MATERIALS 290 巻頁： 1134 - 1137 2001年3月

Evaluation of electron temperature in detached recombining plasmas 査読有り国際共著国際誌

Nishijima D., Wenzel U., Motoyama M., Ohno N., Takamura S., Krasheninnikov S.

Journal of Nuclear Materials 290-293 巻頁： 688 - 691 2001年3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：Journal of Nuclear Materials

Detailed spectroscopic measurements have been carried out in the linear divertor plasma simulator, NAGDIS-II in order to acquire the accurate evaluation of the electron temperature, which leads to a deeper understanding of the characteristics of detached recombining plasmas. Electron temperature in the detached recombining plasmas was evaluated by two different spectroscopic methods, using continuum emission and a series of line emission from highly excited levels, giving different electron temperatures. The reasons are discussed based on the effects of energetic electrons.

DOI： 10.1016/S0022-3115(00)00528-6

Scopus

Experimental observation of vertically polarized transverse dust-lattice wave propagating in a one-dimensional strongly coupled dust chain 査読有り国際誌

Misawa T., Ohno N., Asano K., Sawai M., Takamura S., Kaw P.K.

Physical Review Letters 86 巻 ( 7 ) 頁： 1219 - 1222 2001年2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 Letters

The existence of transverse dust-lattice wave (T-DLW) propagating in a one-dimensional strongly coupled dust chain levitated in dc argon plasma at low gas pressure was assessed. Both parts of the complex wave number were measured in the experiments. The real part showed that the T-DLW propagation as a backward wave.

DOI： 10.1103/PhysRevLett.86.1219

Scopus

Experimental Observation of Vertically Polarized Transverse Dust Lattice Wve Propagating in a One Dimensional Strongly Coupled Dust Chain 査読有り

T.Misawa, N.Ohno, K.Asano, M.Sawai, S.Takamura, P.K.Kaw

Physcal Review Letters 86 巻 ( 7 ) 頁： 1219-1222 2001年

Evaluation of Electron Teperature in Detached Recombining Plasma 査読有り

D.Nishijima, U.Wenzel, M.Motoyama, N.Ohno, S.I.Krasheninnikov, S.Takamura

Journal of Nuclear Materials 290-293 巻頁： 688-691 2001年

小特集「プラズマ対向面での損耗・再堆積研究の進展」3.直線型プラズマ装置を用いた高融点金属材料の損耗・再堆積モデル実験

大野哲靖、高村秀一

プラズマ・核融合学会誌 77 巻 ( 9 ) 頁： 864-868 2001年

Influence of Plasma Resistance and Fluctuation on Probe Characeteristics in Detached Recombining Plasmas 査読有り

N.Ohno, N.Tanaka, N.Ezumi, D.Nishijima, S.Takamura

Contib. Plasma Physics 41 巻頁： 473-480 2001年

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