Research Output 1979 2019

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2009
12 Citations (Scopus)

Microstructure of creep-deformed V-4Cr-4Ti strengthened by precipitation and cold rolling

Muroga, T., Nagasaka, T., Chen, J. M., Li, Y. F. & Watanabe, H., Apr 30 2009, In : Journal of Nuclear Materials. 386-388, C, p. 606-609 4 p.

Research output: Contribution to journalArticle

cold rolling
Cold rolling
Precipitates
precipitates
Creep

Multi-scale interaction between Neoclassical tearing mode and drift wave

Yagi, M., Itoh, S. & Itoh, K., Dec 1 2009, In : Theoretical and Applied Mechanics Japan. 57, p. 199-205 7 p.

Research output: Contribution to journalArticle

Linear Stability
Interaction
Bootstrap
Eigenfunctions
Viscosity

Multi-scale transport simulation of non-local turbulent effect on internal transport barrier collapse in tokamak plasma

Tokunaga, S., Yagi, M., Itoh, S. & Itoh, K., Dec 1 2009, In : Theoretical and Applied Mechanics Japan. 57, p. 429-436 8 p.

Research output: Contribution to journalArticle

Thermal gradients
Turbulence
Plasma
Internal
Plasmas
5 Citations (Scopus)

Multi-scale transport simulation of toroidal momentum source profile effect on internal transport barrier collapse

Tokunaga, S., Yagi, M., Itoh, S. & Itoh, K., Sep 21 2009, In : Nuclear Fusion. 49, 7, 075023.

Research output: Contribution to journalArticle

ion temperature
momentum
profiles
shear flow
temperature gradients
2 Citations (Scopus)

Nonlinear effect on the plasma blob propagation in the scrape-off layer

Sugita, S., Yagi, M., Itoh, S. & Itoh, K., Dec 1 2009, In : Theoretical and Applied Mechanics Japan. 57, p. 207-215 9 p.

Research output: Contribution to journalArticle

Nonlinear Effects
Plasma
Propagation
Plasmas
propagation
19 Citations (Scopus)

Nonlinear self-interaction of geodesic acoustic modes in toroidal plasmas

Sasaki, M., Itoh, K., Nagashima, Y., Ejiri, A. & Takase, Y., Mar 9 2009, In : Physics of Plasmas. 16, 2, 022306.

Research output: Contribution to journalArticle

toroidal plasmas
vorticity
acoustics
harmonics
Reynolds stress
43 Citations (Scopus)

Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma

Nagashima, Y., Itoh, S. I., Shinohara, S., Fukao, M., Fujisawa, A., Terasaka, K., Kawai, Y., Tynan, G. R., Diamond, P. H., Yagi, M., Inagaki, S., Yamada, T. & Itoh, K., 2009, In : Physics of Plasmas. 16, 2, 020706.

Research output: Contribution to journalArticle

oscillations
electric fields
energy transfer
Reynolds stress
modulation
11 Citations (Scopus)

Observations of abrupt changes in the fluctuation spectrum on LMD-U

Arakawa, H., Kamataki, K., Shigeru, I., Maruta, T., Nagashima, Y., Yamada, T., Shinohara, S., Terasaka, K., Sugita, S., Yagi, M., Kasuya, N., fujisawa, A., Itoh, S. & Itoh, K., Nov 6 2009, In : Plasma Physics and Controlled Fusion. 51, 8, 085001.

Research output: Contribution to journalArticle

Power spectrum
Time delay
Plasmas
Ions
power spectra
9 Citations (Scopus)

Parametric decay instability during high harmonic fast wave heating experiments on the TST-2 spherical tokamak

Oosako, T., Takase, Y., Ejiri, A., Nagashima, Y., Adachi, Y., Kasahara, H., Yamada, T., Watanabe, O., Tojo, H., Kainaga, S., Sugiyama, J., Yamaguchi, T., An, B., Hayashi, H., Kobayashi, H., Kurashina, H., Matsuzawa, H., Yamada, K., Kumazawa, R., Shimpo, F. & 3 others, Ono, Y., Masuda, T. & Sasaki, M., Jul 6 2009, In : Nuclear Fusion. 49, 6, 065020.

Research output: Contribution to journalArticle

harmonics
heating
decay
sidebands
pumps
1 Citation (Scopus)

Physical design and future plan of QUEST

Hanada, K., Sato, K., Zushi, H., Nakamura, K., Sakamoto, M., Idei, H., Hasegawa, M., Takase, Y., Maekawa, T. & Mitarai, O., Oct 26 2009, In : IEEJ Transactions on Fundamentals and Materials. 129, 9, p. 589-594+5

Research output: Contribution to journalArticle

Plasmas
Beam plasma interactions
Fusion reactions
Metals
Experiments
1 Citation (Scopus)

Simultaneous realization of a high density edge transport barrier and an improved L-mode on CHS

Minami, T., Okamura, S., Suzuki, C., Matsuo, K., Oishi, T., Akiyama, T., Isobe, M., Ida, K., Nakano, H., fujisawa, A., Nagaoka, K., Yoshinuma, M., Yoshimura, Y., Toi, K., Ohshima, S., Takeuchi, M., Iguchi, H., Nishimura, S., Shimizu, A., Matsuoka, K. & 1 others, Takahashi, C., Sep 21 2009, In : Nuclear Fusion. 49, 8, 085018.

Research output: Contribution to journalArticle

plasma pressure
neutral particles
pressure gradients
impurities
energy
13 Citations (Scopus)

Spherical cauliflower-like carbon dust formed by interaction between deuterium plasma and graphite target and its internal structure

Ohno, N., Yoshimi, M., Tokitani, M., Takamura, S., Tokunaga, K. & Yoshida, N., Jun 15 2009, In : Journal of Nuclear Materials. 390-391, 1, p. 61-64 4 p.

Research output: Contribution to journalArticle

deuterium plasma
Graphite
Deuterium
Beam plasma interactions
Dust
50 Citations (Scopus)

Study on characteristic parameters of a new converter transformer for HVDC systems

Li, Y., Luo, L., Rehtanz, C., Nakamura, K., Xu, J. & Liu, F., Aug 4 2009, In : IEEE Transactions on Power Delivery. 24, 4, p. 2125-2131 7 p.

Research output: Contribution to journalArticle

Short circuit currents
Electric potential
120 Citations (Scopus)

The effects of high fluence mixed-species (deuterium, helium, beryllium) plasma interactions with tungsten

Baldwin, M. J., Doerner, R. P., Nishijima, D., Tokunaga, K. & Ueda, Y., Jun 15 2009, In : Journal of Nuclear Materials. 390-391, 1, p. 886-890 5 p.

Research output: Contribution to journalArticle

Plasma interactions
Beryllium
plasma interactions
Helium
Tungsten
1 Citation (Scopus)

The microstructural evolution of precipitate strengthened copper alloys by varying temperature irradiation

Sumino, Y., Watanabe, H. & Yoshida, N., Apr 30 2009, In : Journal of Nuclear Materials. 386-388, C, p. 654-657 4 p.

Research output: Contribution to journalArticle

copper alloys
Copper alloys
Microstructural evolution
Precipitates
precipitates
4 Citations (Scopus)

The microstructure of laser welded Y doped V-4Cr-4Ti alloys after ion irradiation

Watanabe, H., Higashijima, A., Yoshida, N., Nagasaka, T. & Muroga, T., Apr 30 2009, In : Journal of Nuclear Materials. 386-388, C, p. 598-601 4 p.

Research output: Contribution to journalArticle

Titanium oxides
Ion bombardment
ion irradiation
titanium oxides
Irradiation
2 Citations (Scopus)

Two dimensional density fluctuation measurements during the non-inductive current ramp-up phase in the compact plasma wall interaction experimental device CPD

Zushi, H., Ryoukai, T., Kikukawa, K., Morisaki, T., Bhattacharyay, R., Yoshinaga, T., Hanada, K., Sakimura, T., Idei, H., Dono, K., Nishino, N., Honma, H., Tashima, S., Mutoh, T., Kubo, S., Nagasaki, K., Sakamoto, M., Nakashima, Y., Higashizono, Y., Sato, K. N. & 5 others, Nakamura, K., Hasegawa, M., Kawasaki, S., Nakashima, H. & Higashijima, A., Dec 11 2009, In : Plasma Science and Technology. 11, 4, p. 397-401 5 p.

Research output: Contribution to journalArticle

ramps
bursts
interactions
inflection points
magnetic flux
2008
118 Citations (Scopus)

Anatomy of plasma turbulence

Yamada, T., Itoh, S. I., Maruta, T., Kasuya, N., Nagashima, Y., Shinohara, S., Terasaka, K., Yagi, M., Inagaki, S., Kawai, Y., Fujisawa, A. & Itoh, K., Sep 2008, In : Nature Physics. 4, 9, p. 721-725 5 p.

Research output: Contribution to journalArticle

plasma turbulence
anatomy
turbulence
bunching
locking
1 Citation (Scopus)

A WEB-based integrated data processing system for the TRIAM-1M

Hasegawa, M., Higashijima, A., Nakamura, K., Hanada, K., Sato, K. N., Sakamoto, M., Idei, H., Kawasaki, S. & Nakashima, H., May 1 2008, In : Fusion Engineering and Design. 83, 4, p. 588-593 6 p.

Research output: Contribution to journalArticle

Plasmas
Servers
Experiments
HTML
User interfaces
4 Citations (Scopus)

Bifurcation of heat transport in high temperature plasma

Ida, K., Shigeru, I., Sakamoto, R., Itoh, K., Tanaka, K. & Funaba, H., Dec 1 2008, In : Journal of the Physical Society of Japan. 77, 12, 124501.

Research output: Contribution to journalArticle

high temperature plasmas
heat
temperature dependence
heat flux
pellets
22 Citations (Scopus)

Bifurcation phenomena of a magnetic island at a rational surface in a magnetic-shear control experiment

Ida, K., Shigeru, I., Yoshinuma, M., Narushima, Y., Itoh, K., Kobuchi, T., Watanabe, K. Y., Funaba, H., Sakakibara, S. & Morisaki, T., Jan 30 2008, In : Physical Review Letters. 100, 4, 045003.

Research output: Contribution to journalArticle

magnetic islands
shear
flattening
neutral beams
profiles
4 Citations (Scopus)

Change of fluctuation properties during non-local temperature rise in LHD from 2d phase contrast imaging

Michael, C. A., Tanaka, K., Vyacheslavov, L., Sanin, A., Kawahata, K., Okajima, S., Tamura, N., Inagaki, S., Fukuda, T., Yoshinuma, M. & Yokoyama, M., Jan 1 2008, In : Journal of Physics: Conference Series. 123, 012018.

Research output: Contribution to journalArticle

phase contrast
temperature
phase velocity
pellets
heat flux
5 Citations (Scopus)

Characteristics of high density edge transport barrier with reheat mode on CHS

Minami, T., Okamura, S., Akiyama, T., Ida, K., Oishi, T., Isobe, M., Nakano, H., Fujisawa, A., Nagaoka, K., Yoshinuma, M., Suzuki, C., Yoshimura, Y., Toi, K., Ohshima, S., Takeuchi, M., Iguchi, H., Nishimura, S., Shimizu, A., Matsuoka, K. & Takahashi, C., Jan 1 2008, In : Journal of Physics: Conference Series. 123, 012006.

Research output: Contribution to journalArticle

refueling
neutral particles
retarding
gases
temperature
4 Citations (Scopus)

Clear transition to high-Te state with an electron internal transport barrier creation in EC heated LHD plasmas

Shimozuma, T., Kubo, S., Igami, H., Yoshimura, Y., Notake, T., Shigeru, I., Tamura, N., Ida, K., Yokoyama, M., Yamada, I., Narihara, K., Mutoh, T. & Komori, A., Jan 1 2008, In : Journal of Physics: Conference Series. 123, 012022.

Research output: Contribution to journalArticle

electron cyclotron heating
electron energy
electrons
field coils
neutral beams
15 Citations (Scopus)

Coexistence of zonal flows and drift-waves in a cylindrical magnetized plasma

Nagashima, Y., Itoh, S. I., Shinohara, S., Fukao, M., Fujisawa, A., Terasaka, K., Kawai, Y., Kasuya, N., Tynan, G. R., Diamond, P. H., Yagi, M., Inagaki, S., Yamada, T. & Itoh, K., Nov 2008, In : journal of the physical society of japan. 77, 11, 114501.

Research output: Contribution to journalArticle

cylindrical plasmas
low frequencies
cyclotron frequency
Reynolds stress
profiles
9 Citations (Scopus)

Control, data acquisition, data analysis and remote participation in LHD

Nagayama, Y., Emoto, M., Nakanishi, H., Sudo, S., Imazu, S., Shigeru, I., Iwata, C., Kojima, M., Nonomura, M., Ohsuna, M., Tsuda, K., Yoshida, M., Chikaraishi, H., Funaba, H., Horiuchi, R., Ishiguro, S., Ito, Y., Kubo, S., Mase, A., Mito, T. & 12 others, Miyazawa, J., Mutoh, T., Nakamura, Y., Saito, K., Sakamoto, R., Seki, T., Shoji, M., Takami, S., Watanabe, T., Yamamoto, T., Komori, A. & Motojima, O., Apr 1 2008, In : Fusion Engineering and Design. 83, 2-3, p. 170-175 6 p.

Research output: Contribution to journalArticle

Data acquisition
Supercomputers
Plasmas
Virtual private networks
Web browsers
2 Citations (Scopus)

Control system and the controllability of CPD and QUEST

Nakamura, K., Hasegawa, M., Wang, F., Kawasaki, S., Nakashima, H., Higashijima, A., Sato, K. N., Zushi, H., Hanada, K., Sakamoto, M. & Idei, H., Apr 1 2008, In : Fusion Engineering and Design. 83, 2-3, p. 236-240 5 p.

Research output: Contribution to journalArticle

Controllability
Control systems
Beam plasma interactions
Experiments
Plasmas
2 Citations (Scopus)

Core electron temperature rise due to Ar gas-puff in EC-heated LHD plasmas

Tamura, N., Shigeru, I., Ida, K., Tanaka, K., Michael, C., Tokuzawa, T., Yamada, I., Narihara, K., Shimozuma, T., Kubo, S., Igami, H., Fukuda, T., Itoh, K., Nagayama, Y., Kawahata, K., Sudo, S. & Komori, A., Jan 1 2008, In : Journal of Physics: Conference Series. 123, 012023.

Research output: Contribution to journalArticle

electron energy
gases
electrons
transient response
pellets
2 Citations (Scopus)

Density collapse and fluctuation observed in poloidally rotating plasma on TU-Heliac

Tanaka, Y., Kitajima, S., Sasao, M., Utoh, H., Aoyama, H., Iwazaki, K., Umetsu, H., Ishii, K., Okamoto, A., Kobuchi, T., Shigeru, I., Suzuki, Y. & Takahashi, H., Jan 1 2008, In : Plasma and Fusion Research. 3, S1055.

Research output: Contribution to journalArticle

rotating plasmas
hot cathodes
saturation
power spectra
ions
3 Citations (Scopus)

Density control by second harmonic X-mode ECRH in LHD

LHD Experimental Group, Jan 1 2008, In : Plasma and Fusion Research. 3, S1028.

Research output: Contribution to journalArticle

electron cyclotron resonance
harmonics
heating
electron flux
ripples
4 Citations (Scopus)

Detection of a new parametric decay instability branch in TST-2 during high harmonic fast wave heating

Adachi, Y., Ejiri, A., Takase, Y., Watanabe, O., Oosako, T., Tojo, H., Kainaga, S., Masuda, T., Sasaki, M., Sugiyama, J. & Yamaguchi, T., Nov 10 2008, In : Review of Scientific Instruments. 79, 10, 10F507.

Research output: Contribution to journalArticle

sidebands
harmonics
Heating
heating
decay
1 Citation (Scopus)

Development of hydrogen storage electrode for plasma biasing in the Tohoku University Heliac

Utoh, H., Nishimura, K., Takahashi, H., Tanaka, Y., Aoyama, H., Iwazaki, K., Umetsu, H., Ishii, K., Shigeru, I., Yokoyama, M., Suzuki, Y., Okamoto, A., Kobuchi, T., Kitajima, S. & Sasao, M., Jan 1 2008, In : Journal of Physics: Conference Series. 123, 012024.

Research output: Contribution to journalArticle

electrodes
hydrogen
palladium
hot cathodes
plasma density
13 Citations (Scopus)

Disparate scale nonlinear interactions in edge turbulence

Yagi, M., Itoh, S., Itoh, K. & Diamond, P. H., Mar 1 2008, In : Contributions to Plasma Physics. 48, 1-3, p. 13-22 10 p.

Research output: Contribution to journalArticle

turbulence
end plates
interactions
configurations

Dynamic transport study of electron thermal energy in nonlinear fusion plasma

the LHD Experimental Group, Jan 1 2008, In : Plasma and Fusion Research. 3, S1029.

Research output: Contribution to journalArticle

plasma turbulence
thermal energy
fusion
trajectories
electron cyclotron heating
1 Citation (Scopus)

Effects of magnetic field and target plasma on the penetration behaviour of compact toroid plasma by heat load measurements in CPD

Bhattacharyay, R., Zushi, H., Fukumoto, N., Nagata, M., Nishino, N., Honma, H., Kawakami, K., Yoshida, N., Kawasaki, S., Yoshinaga, T., Sasaki, K., Hasegawa, M., Sato, K. N., Sakamoto, M., Nakamura, K., Idei, H., Nakashima, H. & Higashijima, A., Oct 1 2008, In : Nuclear Fusion. 48, 10, 105001.

Research output: Contribution to journalArticle

toroids
penetration
heat
magnetic fields
cameras
15 Citations (Scopus)

Experimental studies of zonal flow and field in compact helical system plasma

Fujisawa, A., Itoh, K., Shimizu, A., Nakano, H., Ohshima, S., Iguchi, H., Matsuoka, K., Okamura, S., Minami, T., Yoshimura, Y., Nagaoka, K., Ida, K., Toi, K., Takahashi, C., Kojima, M., Nishimura, S., Isobe, M., Suzuki, C., Akiyama, T., Ido, T. & 3 others, Nagashima, Y., Itoh, S. I. & Diamond, P. H., Jun 9 2008, In : Physics of Plasmas. 15, 5, 055906.

Research output: Contribution to journalArticle

turbulence
plasma physics
nuclear energy
nuclear fusion
magnetic fields
12 Citations (Scopus)

Experimental study of driftwave turbulence in linear plasmas

Yamada, T., Itoh, S., Maruta, T., Kasuya, N., Shinohara, S., Nagashima, Y., Yagi, M., Terasaka, K., Shigeru, I., Kawai, Y., Fukao, M., fujisawa, A. & Itoh, K., Jan 1 2008, In : Plasma and Fusion Research. 3, 044.

Research output: Contribution to journalArticle

turbulence
sine waves
electrostatic probes
spectrum analysis
temperature measurement
8 Citations (Scopus)

First demonstration of rotational transform control by electron cyclotron current drive in large helical device

LHD Experimental Group, Jan 1 2008, In : Plasma and Fusion Research. 3, S1077.

Research output: Contribution to journalArticle

cyclotrons
electrons
shear
plasma currents
polarimetry

High accessible experimental information on CPD experiment

Hasegawa, M., Nakamura, K., Higashijima, A., Kawasaki, S., Nakashima, H., Sato, K. N., Zushi, H., Hanada, K., Sakamoto, M. & Idei, H., Apr 1 2008, In : Fusion Engineering and Design. 83, 2-3, p. 402-405 4 p.

Research output: Contribution to journalArticle

Mobile phones
Web services
Laptop computers
Internet
Experiments
2 Citations (Scopus)

Initial plasma production by townsend avalanche breakdown on QUEST tokamak

Hasegawa, M., Hanada, K., Sato, K., Nakamura, K., Zushi, H., Sakamoto, M., Idei, H., Kawasaki, S., Nakashima, H. & Higashijima, A., Jan 18 2008, In : Japanese Journal of Applied Physics. 47, 1, p. 287-292 6 p.

Research output: Contribution to journalArticle

Townsend avalanche
Plasma sources
induction
breakdown
Electric fields
6 Citations (Scopus)

Investigation of competitive oscillations between drift mode and flute mode in linear cylindrical ECR plasma

Kamataki, K., Itoh, S., Nagashima, Y., Shigeru, I., Shinohara, S., Yagi, M., Yamada, T., Kawai, Y., fujisawa, A. & Itoh, K., Mar 1 2008, In : Plasma Physics and Controlled Fusion. 50, 3, 035011.

Research output: Contribution to journalArticle

Electron cyclotron resonance
electron cyclotron resonance
Plasmas
oscillations
Harmonic generation
16 Citations (Scopus)

Measurement of derivative of ion temperature using high spatial resolution charge exchange spectroscopy with space modulation optics

Ida, K., Sakamoto, Y., Yoshinuma, M., Inagaki, S., Kobuchi, T., Matsunaga, G. & Koide, Y., Jun 9 2008, In : Review of Scientific Instruments. 79, 5, 053506.

Research output: Contribution to journalArticle

Optical resolving power
ion temperature
charge exchange
Optics
Ion exchange

Modification of symmetry of poloidal eigenmode of geodesic acoustic mode

Sasaki, M., 2008, In : Plasma and Fusion Research. 3, p. 009 3.

Research output: Contribution to journalArticle

41 Citations (Scopus)

Momentum theorems and the structure of atmospheric jets and zonal flows in plasmas

Diamond, P. H., Gurcan, O. D., Hahm, T. S., Miki, K., Kosuga, Y. & Garbet, X., Dec 1 2008, In : Plasma Physics and Controlled Fusion. 50, 12, 124018.

Research output: Contribution to journalArticle

jet flow
Momentum
Turbulence
theorems
turbulence
19 Citations (Scopus)

Nonlinear dynamics of rotating drift-tearing modes in tokamak plasmas

Nishimura, S., Benkadda, S., Yagi, M., Itoh, S. & Itoh, K., Oct 9 2008, In : Physics of Plasmas. 15, 9, 092506.

Research output: Contribution to journalArticle

Reynolds stress
Prandtl number
transport properties
viscosity
saturation
6 Citations (Scopus)

Nonlinear energy transfer of drift-wave fluctuation in a cylindrical laboratory plasma

Nagashima, Y., Itoh, S., Shinohara, S., Fukao, M., fujisawa, A., Terasaka, K., Kawai, Y., Kasuya, N., Yagi, M., Shigeru, I., Yamada, T. & Itoh, K., Jan 1 2008, In : Plasma and Fusion Research. 3, 056.

Research output: Contribution to journalArticle

transfer functions
energy transfer
potential energy
electrostatics
harmonics
3 Citations (Scopus)

Non-local turbulent effect on internal transport barrier collapse in reversed shear configuration

Tokunaga, S., Yagi, M., Itoh, S. & Itoh, K., Jan 1 2008, In : Journal of Physics: Conference Series. 123, 012030.

Research output: Contribution to journalArticle

shear
configurations
turbulence
safety factors
interactions
1 Citation (Scopus)

Observation of zonal flow type oscillation in linear cylindrical ECR plasmas

Kamataki, K., Itoh, S., Nagashima, Y., Shigeru, I., Shinohara, S., Yagi, M., Yamada, T., Kawai, Y., fujisawa, A. & Itoh, K., Jan 1 2008, In : Plasma and Fusion Research. 3, 047.

Research output: Contribution to journalArticle

electron cyclotron resonance
oscillations
low frequencies
turbulence
modulation
6 Citations (Scopus)

Poloidal flow generated by drift-tearing mode

Nishimura, S., Yagi, M., Itoh, S. & Itoh, K., Jan 1 2008, In : Journal of the Physical Society of Japan. 77, 1, 014501.

Research output: Contribution to journalArticle

magnetic islands
two fluid models
viscosity
ions
simulation
2 Citations (Scopus)

Possible maximum amplitude of streamers in drift wave turbulence

Itoh, S. & Itoh, K., May 1 2008, In : Plasma Physics and Controlled Fusion. 50, 5, 055002.

Research output: Contribution to journalArticle

Turbulence
turbulence
kinetic equations
partitions
Damping