Faculty Profiles - OHNO, Noriyasu

Papers - OHNO, Noriyasu

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Self-consistent dusty sheaths in plasmas with two-temperature electrons Reviewed

Yu.I.Chutov, O.Kravchenko, A.Pshenychnyj, R.Smirnov, K.Asano, N.Ohno, S.Takamura, Y.Tomita

Physics of Plasmas Vol. 10 ( 2 ) page： 546-552 2003

Fluctuation Characteristics in Detached Recombining Plasmas

N.Ohno, N.Tanaka, S. Takamura, V.Budaev

AIP Conference Proceedings Vol. 669 page： 240-243 2003

Edge Plasma Turbulence in Fusion Devices: Bursty Behavior and Fractal Properties

V.P.Budaev, S.Takamura, N.Ohno, A.Komori, S.Masuzaki, G.S.Kirnev, S.A.Grashin

30th EPS Conference on Contr. Fusion and Plasma Phys., St. Petersburg, 7-11 July 2003 ECA Vol. 27A page： 3.174 2003

Intermittent Structures in the High Field Side Boundary of the HYBTOK-II Tokamak

V.P.Budaev, S.Takamura, Y.Kikuchi, Y.Uesugi, N.Ohno

30th EPS Conference on Contr. Fusion and Plasma Phys., St. Petersburg, 7-11 July 2003 ECA Vol. 27A page： 3.173 2003

Surface Morphology of Tungsten Irradiated by Low-Energy and High-Flux Steady State Helium Plasma

D.Nishijima, M.Y.Ye, N.Ohno, S.Takamura

30th EPS Conference on Contr. Fusion and Plasma Phys., St.Petersburg, 7-11 July 2003 ECA Vol. 27-A page： 2.163 2003

Structural Dynamics of Deep Negative Potential Well Formation in Small Tokamak Device CSTN-IV

H.Kojima, Y.Fukuzawa, T.Manabe, N.Ohno, S.Takamura

30th EPS Conference on Contr. Fusion and Plasma Phys., St.Petersburg, 7-11 July 2003 ECA Vol. 27A page： 2.130 2003

Experimental Observation and Statistical Analysis of Density Bursts in the Linear Divertor Simulator NAGDIS-II

N.Ohno, K.Furuta, H.Miyoshi, S.Takamura, V.P.Budaev

30th EPS Conference on Contr. Fusion and Plasma Phys., St. Petersburg, 7-11 July 2003 ECA Vol. 27A page： 2.154 2003

Influence of the Ion Beam on the Behavior of Dust Particles Trapped in an Ion Sheath

T.Murakami, M.Sawai, T.Misawa, N.Ohno, S.Takamura

AIP Conference Proceedings Vol. 669 page： 101-104 2003

Sound Wave Propagation in Gases at Low Pressure

T.Tonogaki, N.Ohno, S.Takamura, A.Tsushima

AIP Conference Proceedings Vol. 669 page： 113-116 2003

25aA28P Statistical analysis of fluctuation property in edge plasmas of the LHD Reviewed

MIYOSHI Hideaki, TAKAMURA Shuichi, OHNO Noriyasu, MASUZAKI Suguru, KOMORI Akio, Budaev V.P.

( 20 ) 2003

25aB37P Construction of High Heat Flux Toroidal Divertor Plasma Simulator Reviewed

Sora Shigeki, Kitahara Hiroyoshi, Ohno Noriyasu, Uesugi Yoshihiko, Takamura Shuichi

( 20 ) 2003

25aB11P Blister Formation on Low-Temperature Refractory Metal Surface under Low Energy and High Flux Hydrogen Plasma Irradiation Reviewed

SUGIMOTO Takanori, OHNO Noriyasu, TAKAMURA Shuichi

( 20 ) 2003

26aA40P Formation of Deep Potential Well by Electrode Biasing in Tokamak Device Reviewed

FUKUZAWA Yuma, KOJIMA Hiroki, OKADA Takahiro, OHNO Noriyasu, TAKAMURA Shuichi, IGUCHI Tetsuo

( 20 ) 2003

28aA17P Influence of Energetic Electron Components on Unstable Oscillation of Dust Particles Trapped in Plasma-Sheath Boundary Reviewed

KOBAYASHI Atsuhiro, IMASATO Kae, OHNO Noriyasu, TAKAMURA Shuichi

( 20 ) 2003

27pB22P Fluctuation Analysis in Detached and Attached Plasmas Reviewed

Furuta K., Ohno N., Takamura S.

( 20 ) 2003

Generation and characteristics of a detached recombining plasma and its dynamic behaviour-a bridge between fusion plasmas and low-temperature ionized gases Reviewed International journal

Takamura S, Ohno N, Nishijima D, Uesugi Y

PLASMA SOURCES SCIENCE & TECHNOLOGY Vol. 11 ( 3A ) page： A42 - A48 2002.8

Characteristics of detached plasmas associated with electron-ion and molecular assisted recombinations in NAGDIS-II Reviewed International coauthorship International journal

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

Plasma Physics and Controlled Fusion Vol. 44 ( 5 ) page： 597 - 610 2002.5

Language：English Publishing type：Research paper (scientific journal) Publisher：Plasma Physics and Controlled Fusion

Recombination in a helium and helium-hydrogen plasma was experimentally investigated in the linear divertor simulator NAGDIS-II. To identify the physical mechanisms, electron-ion recombination (EIR) and molecular assisted recombination (MAR), the plasma parameters in the recombining region have been measured. We used spectroscopic techniques on the basis of continuum emission and line emission from highly excited levels due to EIR and Langmuir probes. The dependence of the plasma parameters on the neutral pressure in a pure helium plasma and in a helium-hydrogen mixture shows clearly that recombination is caused by different processes in the two cases. In a pure helium plasma a roll-over and a following decrease of the electron density as well as a monotonic decrease of the electron temperature down to 0.1 eV were observed when increasing the helium pressure. Here EIR is the recombination mechanism. Conversely, when hydrogen is added to the helium plasma, the electron density decreases monotonically while the central electron temperature remains above 1 eV. This particular behaviour in the helium-hydrogen plasma can only be explained by the dominant action of MAR.

DOI： 10.1088/0741-3335/44/5/307

Scopus

Response to "comment on 'dynamic behaviors of dust particles in the plasma-sheath boundary'" [Phys. Plasmas 9, 1057 (2002)] Reviewed International journal

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

Physics of Plasmas Vol. 9 ( 3 ) 2002.3

Proposal of Flexible Atomic and Molecular Process Management for Monte Carlo Impurity Transport Code Based on Object Oriented Method Reviewed

K.Asano, N.Ohno, S.Takamura

Contrib. Plasma Physics Vol. 42 page： 157-162 2002

Generation and characteristics of detached recombining plasma and its dynamic behaviour - a bridge between fusion plasmas and low-temperature ionized gases Reviewed

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

Plasma Sources Sci. Technol. Vol. 11 ( 3A ) page： A42-A4 2002

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Papers - OHNO, Noriyasu