Research Output 1979 2019

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2015
4 Citations (Scopus)

Temperature dependence of deuterium retention in tungsten deposits by deuterium ion irradiation

Katayama, K., Uehara, K., Date, H., Fukada, S. & Watanabe, H., Jul 22 2015, In : Journal of Nuclear Materials. 463, p. 1033-1036 4 p., 48697.

Research output: Contribution to journalArticle

Tungsten deposits
Deuterium
Ion bombardment
ion irradiation
deuterium
1 Citation (Scopus)

Test of the telegraph equation for transport dynamics in plasma

Inagaki, S., Itoh, K., Itoh, S. I., Kosuga, Y., Lesur, M. & Kasuya, N., Jan 1 2015, In : Plasma and Fusion Research. 10, 2015, p. 1-2 2 p., 1203002.

Research output: Contribution to journalArticle

heat flux
temperature gradients
fusion
relaxation time
turbulence
1 Citation (Scopus)

The effect of beta-induced Alfvén eigenmode on L-I-H transitions in the HL-2A tokamak

HL-2A team, Jul 1 2015, In : Nuclear Fusion. 55, 7, 073026.

Research output: Contribution to journalArticle

crashes
turbulence
oscillations
cycles
electric fields
22 Citations (Scopus)

Thermal desorption behavior of deuterium for 6 MeV Fe ion irradiated W with various damage concentrations

Oya, Y., Li, X., Sato, M., Yuyama, K., Zhang, L., Kondo, S., Hinoki, T., Hatano, Y., Watanabe, H., Yoshida, N. & Chikada, T., Jan 1 2015, In : Journal of Nuclear Materials. 461, p. 336-340 5 p., 49001.

Research output: Contribution to journalArticle

Thermal desorption
Deuterium
Spectrometry
deuterium
Hydrogen
14 Citations (Scopus)

Thermodynamics of hydrogen-induced superabundant vacancy in tungsten

Ohsawa, K., Nakamori, F., Hatano, Y. & Yamaguchi, M., Jan 1 2015, In : Journal of Nuclear Materials. 458, p. 187-197 11 p.

Research output: Contribution to journalArticle

Tungsten
Vacancies
Hydrogen
tungsten
Thermodynamics
4 Citations (Scopus)

Thomson scattering measurements in low-density plasmas in the TST-2 spherical tokamak

Togashi, H., Ejiri, A., Homma, H., Shinya, T., Takase, Y., Toida, K., Tsujii, N., Yamaguchi, T., Yoshida, Y., Furui, H., Sonehara, M., Nakamura, K., Takahashi, W., Takeuchi, T., Yajima, S., Yamazaki, H., Hasegawa, M., Nagashima, Y. & Tojo, H., Dec 18 2015, In : Journal of Instrumentation. 10, 12, C12020.

Research output: Contribution to journalArticle

Thomson scattering
Plasma density
plasma density
Plasma
Scattering
5 Citations (Scopus)

Tomography for local plasma turbulence measurements

fujisawa, A., Nagashima, Y. & Shigeru, I., Jan 1 2015, In : Plasma and Fusion Research. 10, 1201080.

Research output: Contribution to journalArticle

plasma turbulence
tomography
prototypes
toroidal plasmas
signal to noise ratios
4 Citations (Scopus)

Topology bifurcation of a magnetic flux surface in toroidal plasmas

Lhd Experiment Group & Lhd Experiment Group, Jan 1 2015, In : Plasma Physics and Controlled Fusion. 57, 1, 014036.

Research output: Contribution to journalArticle

toroidal plasmas
Bifurcation (mathematics)
Magnetic flux
magnetic flux
topology
1 Citation (Scopus)

Turbulence elasticity: A key concept to a unified paradigm of L→I→H transition

Guo, Z. B., Diamond, P. H., Kosuga, Y. & Gürcan, D., Apr 1 2015, In : Nuclear Fusion. 55, 4, 043022.

Research output: Contribution to journalArticle

elastic properties
turbulence
shearing
shear flow
shear
2014
4 Citations (Scopus)

Analytical solution of high βp equilibria with natural inboard poloidal null configuration obtained in the spherical tokamak QUEST

QUEST Team, Jan 1 2014, In : Plasma and Fusion Research. 9, SpecialIssue2, 3402093.

Research output: Contribution to journalArticle

safety factors
diamagnetism
configurations
vessels
vacuum
4 Citations (Scopus)

A prototype diagnostics system to detect ultraviolet emission for plasma turbulence

Onchi, T., Fujisawa, A. & Sanpei, A., Nov 1 2014, In : Review of Scientific Instruments. 85, 11, 113502.

Research output: Contribution to journalArticle

Plasma turbulence
plasma turbulence
ultraviolet emission
prototypes
Plasma devices

A TEM investigation of crack formation mechanism on chrome-molybdenum steel tested under real driving conditions

Matsumoto, K., Watanabe, H. & Yoshida, N., Jan 1 2014, Tribology and Lubrication Technology, 70, 1, p. 47-57 11 p.

Research output: Contribution to specialist publicationArticle

Molybdenum
Steel
crack initiation
Crack initiation
molybdenum

Bursting high-frequency fluctuation observed in biased plasma in TU-Heliac

Koike, S., Kitajima, S., Okamoto, A., Ishii, K., Sato, Y., Tachibana, J., Oku, T., Shimizu, K., Shigeru, I., Suzuki, Y., Takahashi, H. & Takayama, M., Oct 1 2014, In : Nuclear Fusion. 54, 11, 114013.

Research output: Contribution to journalArticle

gradients
profiles
probes
electrostatic probes
monitors
7 Citations (Scopus)

Comparison of hydrogen isotope retention for tungsten probes in LHD vacuum vessel during the experimental campaigns in 2011 and 2012

Oya, Y., Masuzaki, S., Tokitani, M., Sato, M., Toda, K., Uchimura, H., Yoshida, N., Watanabe, H., Yamauchi, Y., Hino, T., Miyamoto, M., Hatano, Y. & Okuno, K., Oct 2014, In : Fusion Engineering and Design. 89, 7-8, p. 1091-1095 5 p.

Research output: Contribution to journalArticle

Tungsten
Isotopes
Hydrogen
Vacuum
Plasmas
9 Citations (Scopus)

Crystal orientation dependence of surface modification in molybdenum mirror irradiated with helium ions

Miyamoto, M., Takaoka, H., Ono, K., Morito, S., Yoshida, N., Watanabe, H. & Sagara, A., Jan 1 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 297-300 4 p.

Research output: Contribution to journalArticle

Helium
Molybdenum
helium ions
Crystal orientation
molybdenum
3 Citations (Scopus)

Current activities in the interactive joint research at tohoku university - advanced evaluation of radiation effects on fusion materials

Kurishita, H., Hatakeyama, M., Narui, M., Matsuo, S., Shikama, T., Tada, K., Ohno, N., Takeuchi, T., Hatano, Y., Nishiura, M., Nakashima, Y., Watanabe, H., Tokunaga, K., Hino, T., Ueda, Y., Muroga, T., Sagara, A. & Kaneko, O., Jan 1 2014, In : Plasma and Fusion Research. 9, SpecialIssue2, 3405136.

Research output: Contribution to journalArticle

radiation effects
fusion
evaluation
desorption
neutron irradiation
1 Citation (Scopus)

Demonstration of improvement in the signal-to-noise ratio of Thomson scattering signal obtained by using a multi-pass optical cavity on the Tokyo Spherical Tokamak-2

Togashi, H., Ejiri, A., Hiratsuka, J., Nakamura, K., Takase, Y., Yamaguchi, T., Furui, H., Imamura, K., Inada, T., Kakuda, H., Nakanishi, A., Oosako, T., Shinya, T., Sonehara, M., Tsuda, S., Tsujii, N., Wakatsuki, T., Hasegawa, M., Nagashima, Y., Narihara, K. & 2 others, Yamada, I. & Tojo, H., Jan 1 2014, In : Review of Scientific Instruments. 85, 11, 11D486.

Research output: Contribution to journalArticle

Thomson scattering
Signal to noise ratio
signal to noise ratios
Demonstrations
Scattering

Development of a high CMRR magnetic probe for the biased plasma in TU-Heliac

Koike, S., Kitajima, S., Okamoto, A., Ishii, K., Sato, Y., Tachibana, J., Oku, T., Shimizu, K., Shigeru, I., Suzuki, Y., Takahashi, H. & Takayama, M., Jan 1 2014, In : Plasma and Fusion Research. 9, 1202053.

Research output: Contribution to journalArticle

magnetic probes
rejection
hot cathodes
probes
preamplifiers
2 Citations (Scopus)

Development of a plasma control system for steady-state operation on QUEST

Hasegwa, M., Nakamura, K., Zushi, H., Hanada, K., fujisawa, A., Matsuoka, K., Idei, H., Nagashima, Y., Tokunaga, K., Kawasaki, S., Nakashima, H. & Higashijima, A., Jan 1 2014, In : Journal of the Korean Physical Society. 65, 8, p. 1191-1195 5 p.

Research output: Contribution to journalArticle

plasma control
image filters
magnetic signals
computer vision
magnetic flux
3 Citations (Scopus)

Digital correlation ECE measurement technique with a gigahertz sampling digitizer

Tsuchiya, H., Inagaki, S., Tokuzawa, T., Tamura, N. & Nagayama, Y., Jan 1 2014, In : Plasma and Fusion Research. 9, SPECIALISSUE.2, 3402021.

Research output: Contribution to journalArticle

intermediate frequencies
analog to digital converters
cyclotrons
mesoscale phenomena
sampling

Direct measurement of ion temperature and poloidal rotation velocity with Doppler spectroscopy during Bifurcation in Tohoku University Heliac

Oku, T., Kitajima, S., Ishii, K., Sato, Y., Tachibana, J., Koike, S., Shimizu, K., Okamoto, A., Takahashi, H., Takayama, M. & Inagaki, S., Jan 1 2014, In : Plasma and Fusion Research. 9, SpecialIssue2, 3402051.

Research output: Contribution to journalArticle

ion temperature
spectroscopy
Mach number
viscosity
ions
17 Citations (Scopus)

Dynamics of edge limit cycle oscillation in the JFT-2M Tokamak

Kobayashi, T., Itoh, K., Ido, T., Kamiya, K., Itoh, S., Miura, Y., Nagashima, Y., fujisawa, A., Shigeru, I., Ida, K., Kasuya, N. & Hoshino, K., Jan 1 2014, In : Nuclear Fusion. 54, 7, 073017.

Research output: Contribution to journalArticle

turbulence
oscillations
cycles
Reynolds stress
modulation
5 Citations (Scopus)

Effect of grain orientation and heat treatment on mechanical properties of pure W

Noto, H., Taniguchi, S., Kurishita, H., Matsuo, S., Ukita, T., Tokunaga, K. & Kimura, A., Jan 1 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 475-479 5 p.

Research output: Contribution to journalArticle

heat treatment
fracture strength
Heat treatment
mechanical properties
Mechanical properties
7 Citations (Scopus)

Elasticity in drift-wave-zonal-flow turbulence

Guo, Z. B., Diamond, P. H., Kosuga, Y. & Gürcan, Ö. D., Apr 4 2014, In : Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. 89, 4, 041101.

Research output: Contribution to journalArticle

Elasticity
Turbulence
elastic properties
turbulence
Gradient
7 Citations (Scopus)

End plate biasing experiments in linear magnetized plasmas

Yamada, T., Shigeru, I., Kobayashi, T., Nagashima, Y., Mitsuzono, T., Miwa, Y., Nakanishi, K., Fujino, H., Sasaki, M., Kasuya, N., Lesur, M., Kosuga, Y., fujisawa, A., Itoh, S. & Itoh, K., Nov 1 2014, In : Nuclear Fusion. 54, 11, 114010.

Research output: Contribution to journalArticle

end plates
electron density profiles
waveforms
retarding
electric fields
17 Citations (Scopus)

Evaluation of irradiation hardening of ion-irradiated V-4Cr-4Ti and V-4Cr-4Ti-0.15Y alloys by nanoindentation techniques

Miyazawa, T., Nagasaka, T., Kasada, R., Hishinuma, Y., Muroga, T., Watanabe, H., Yamamoto, T., Nogami, S. & Hatakeyama, M., Jan 1 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 440-444 5 p.

Research output: Contribution to journalArticle

Nanoindentation
nanoindentation
hardening
Hardening
Irradiation
10 Citations (Scopus)

Explicit approximations to estimate the perturbative diffusivity in the presence of convectivity and damping. I. Semi-infinite slab approximations

Van Berkel, M., Zwart, H. J., Tamura, N., Hogeweij, G. M. D., Shigeru, I., De Baar, M. R. & Ida, K., Nov 1 2014, In : Physics of Plasmas. 21, 11, 112507.

Research output: Contribution to journalArticle

diffusivity
slabs
damping
estimates
approximation
4 Citations (Scopus)

Explicit approximations to estimate the perturbative diffusivity in the presence of convectivity and damping. II. Semi-infinite cylindrical approximations

Van Berkel, M., Hogeweij, G. M. D., Tamura, N., Zwart, H. J., Shigeru, I., De Baar, M. R. & Ida, K., Nov 1 2014, In : Physics of Plasmas. 21, 11, 112508.

Research output: Contribution to journalArticle

diffusivity
damping
estimates
approximation
convection
2 Citations (Scopus)

Explicit approximations to estimate the perturbative diffusivity in the presence of convectivity and damping. III. Cylindrical approximations for heat waves traveling inwards

Van Berkel, M., Tamura, N., Hogeweij, G. M. D., Zwart, H. J., Shigeru, I., De Baar, M. R. & Ida, K., Nov 1 2014, In : Physics of Plasmas. 21, 11, 4901311.

Research output: Contribution to journalArticle

traveling waves
diffusivity
damping
heat
estimates
13 Citations (Scopus)

Higher harmonics in the perturbative transport study in TJ-II ECH plasma

Shigeru, I., Itoh, S., Itoh, K., Ida, K., López-Bruna, D., Ochand, M. A., Estrada, T., Van Milligen, B. P., Hidalgo, C., Kasuya, N. & TJ-II team, T., Jan 1 2014, In : Plasma and Fusion Research. 9, 1202052.

Research output: Contribution to journalArticle

harmonics
electron cyclotron heating
radii
perturbation
heating
5 Citations (Scopus)

Identification of quasi-periodic nonlinear waveforms in turbulent plasmas

Inagaki, S., Miwa, Y., Kobayashi, T., Yamada, T., Nagashima, Y., Mitsuzono, T., Fujino, H., Sasaki, M., Kasuya, N., Lesur, M., Kosuga, Y., Fujisawa, A., Itoh, S. I. & Itoh, K., Jan 1 2014, In : Plasma and Fusion Research. 9, 1201016.

Research output: Contribution to journalArticle

waveforms
templates
convolution integrals
iteration
11 Citations (Scopus)

Injection and confinement of a laser pulse in an optical cavity for multi-pass Thomson scattering diagnostics in the TST-2 spherical tokamak device

Togashi, H., Ejiri, A., Hasegawa, M., Hiratsuka, J., Nagashima, Y., Nakamura, K., Narihara, K., Takase, Y., Tojo, H., Tsujii, N., Yamada, I. & Yamaguchi, T., Feb 14 2014, In : Plasma and Fusion Research. 9, 2014, 1202005.

Research output: Contribution to journalArticle

tokamak devices
Thomson scattering
injection
cavities
pulses
8 Citations (Scopus)

Ion temperature gradient driven turbulence with strong trapped ion resonance

Kosuga, Y., Itoh, S., Diamond, P. H., Itoh, K. & Lesur, M., Oct 1 2014, In : Physics of Plasmas. 21, 10, 102303.

Research output: Contribution to journalArticle

ion temperature
temperature gradients
turbulence
ions
space density
11 Citations (Scopus)

Ka-band microwave frequency comb doppler reflectometer system for the large helical device

Lhd Experiment Group, Jan 1 2014, In : Plasma and Fusion Research. 9, 1402149.

Research output: Contribution to journalArticle

reflectometers
microwave frequencies
quadratures
acquisition
generators
20 Citations (Scopus)

Low-intermediate-high confinement transition in HL-2A tokamak plasmas

Cheng, J., Dong, J. Q., Itoh, K., Yan, L. W., Hong, W. Y., Zhao, K. J., Huang, Z. H., Ji, X. Q., Zhong, W. L., Yu, D. L., Itoh, S. I., Nie, L., Song, X. M., Yang, Q. W., Ding, X. T., Zou, X. L., Duan, X. R. & Liu, Y., Nov 1 2014, In : Nuclear Fusion. 54, 11, 114004.

Research output: Contribution to journalArticle

turbulence
oscillations
cycles
electric fields
electron pressure
2 Citations (Scopus)

Method for estimating the propagation direction of a coherent plasma structure using a one-dimensional diagnostic array

Kobayashi, T., Birkenmeier, G., Wolfrum, E., Laggner, F. M., Willensdorfer, M., Stroth, U., Inagaki, S., Itoh, S. I. & Itoh, K., Aug 2014, In : Review of Scientific Instruments. 85, 8, 083507.

Research output: Contribution to journalArticle

estimating
Plasmas
propagation
Emission spectroscopy
Lithium
10 Citations (Scopus)

Microstructure and thermal desorption of deuterium in heavy-ion-irradiated pure tungsten

Watanabe, H., Futagami, N., Naitou, S. & Yoshida, N., Jan 1 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 51-55 5 p.

Research output: Contribution to journalArticle

Heavy Ions
Thermal desorption
Tungsten
Deuterium
Heavy ions
8 Citations (Scopus)

Nonlinear competition of turbulent structures and improved confinement in magnetized cylindrical plasmas

Sasaki, M., Kasuya, N., Itoh, K., Yagi, M. & Itoh, S., Oct 1 2014, In : Nuclear Fusion. 54, 11, 114009.

Research output: Contribution to journalArticle

cylindrical plasmas
damping
turbulence
21 Citations (Scopus)

Nonlinear current-driven ion-acoustic instability driven by phase-space structures

Lesur, M., Diamond, P. H. & Kosuga, Y., Jul 2014, In : Plasma Physics and Controlled Fusion. 56, 7, 075005.

Research output: Contribution to journalArticle

acoustic instability
Acoustics
Ions
ions
Ion acoustic waves
5 Citations (Scopus)

Note: Multi-pass Thomson scattering measurement on the TST-2 spherical tokamak

Togashi, H., Ejiri, A., Hiratsuka, J., Nakamura, K., Takase, Y., Yamaguchi, T., Furui, H., Imamura, K., Inada, T., Kakuda, H., Nakanishi, A., Oosako, T., Shinya, T., Sonehara, M., Tsuda, S., Tsujii, N., Wakatsuki, T., Hasegawa, M., Nagashima, Y., Narihara, K. & 2 others, Yamada, I. & Tojo, H., Jan 1 2014, In : Review of Scientific Instruments. 85, 5, 056103.

Research output: Contribution to journalArticle

Thomson scattering
Laser pulses
Scattering
Plasmas
Lasers
14 Citations (Scopus)

Observation of multi-scale turbulence and non-local transport in LHD plasmas

Tokuzawa, T., Shigeru, I., Ida, K., Itoh, K., Ido, T., Shimizu, A., Takahashi, H., Kitajima, S., Tamura, N., Yoshinuma, M., Tsuchiya, H., Yamada, I., Tanaka, K., Akiyama, T., Nagayama, Y., Kawahata, K., Watanabe, K. Y. & Yamada, H., Jan 1 2014, In : Physics of Plasmas. 21, 5, 055904.

Research output: Contribution to journalArticle

turbulence
propagation
electric fields
temporal resolution
spatial resolution
2 Citations (Scopus)

On violation of local closure of transport relation in high-temperature magnetized plasmas

Kasuya, N., Sugita, S., Shigeru, I., Itoh, K., Yagi, M. & Itoh, S., Nov 1 2014, In : Physics of Plasmas. 21, 11, 110701.

Research output: Contribution to journalArticle

high temperature plasmas
closures
turbulence
hysteresis
modulation
6 Citations (Scopus)

Phase-space jets drive transport and anomalous resistivity

Lesur, M., Diamond, P. H. & Kosuga, Y., Nov 1 2014, In : Physics of Plasmas. 21, 11, 112307.

Research output: Contribution to journalArticle

jet propulsion
electrical resistivity
trapped vortices
space density
low speed
4 Citations (Scopus)

Plasma diagnostics with tracer-encapsulated solid pellet

Sudo, S., Tamura, N., Muto, S., Ozaki, T., Suzuki, C., Funaba, H., Murakami, I., Kato, D., Shigeru, I. & Ida, K., Jan 1 2014, In : Plasma and Fusion Research. 9, 1402039.

Research output: Contribution to journalArticle

plasma diagnostics
pellets
tracers
magnetic islands
impurities
4 Citations (Scopus)

Relative dispersion of trapped ion granulations in sheared flows

Kosuga, Y., Itoh, S. I., Diamond, P. H., Itoh, K. & Lesur, M., Jan 1 2014, In : Plasma and Fusion Research. 9, SPECIALISSUE.2, 3403018.

Research output: Contribution to journalArticle

ions
life (durability)
space density
shearing
closures
16 Citations (Scopus)

Role of energetic electrons during current ramp-up and production of high poloidal beta plasma in non-inductive current drive on QUEST

Tashima, S., Zushi, H., Isobe, M., Hanada, K., Idei, H., Nakamura, K., fujisawa, A., Matsuoka, K., Hasegawa, M., Nagashima, Y., Okamura, S., Banerjee, S., Kawasaki, S., Nakashima, H. & Higashijima, A., Feb 1 2014, In : Nuclear Fusion. 54, 2, 023010.

Research output: Contribution to journalArticle

ramps
electron pressure
magnetic mirrors
magnetic fields
cyclotrons
7 Citations (Scopus)

Role of stochasticity in turbulence and convective intermittent transport at the scrape off layer of Ohmic plasma in QUEST

Banerjee, S., Zushi, H., Nishino, N., Hanada, K., Ishiguro, M., Tashima, S., Liu, H. Q., Mishra, K., Nakamura, K., Idei, H., Hasegawa, M., fujisawa, A., Nagashima, Y. & Matsuoka, K., Jan 1 2014, In : Physics of Plasmas. 21, 7, 072311.

Research output: Contribution to journalArticle

turbulence
probability density functions
vessels
gradients
kurtosis
5 Citations (Scopus)

Shape reconstruction of RF-driven divertor plasma on QUEST

Nakamura, K., Fujita, H., Liu, X. L., Xue, E. B., Xia, F., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Hasegawa, M., Tokunaga, K., Zushi, H., Hanada, K., Fujisawa, A., Matsuoka, K., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A. & 2 others, Araki, K. & Fukuyama, A., Sep 1 2014, In : IEEE Transactions on Plasma Science. 42, 9, p. 2309-2312 4 p., 6871382.

Research output: Contribution to journalArticle

plasma pressure
plasma currents
high energy electrons
decomposition
anisotropy

Statistical analysis of ballistic propagation distance in edge turbulence

Sugita, S., Itoh, K., Yagi, M., Itoh, S., Fuhr, G., Beyer, P. & Benkadda, S., Jan 1 2014, In : Plasma and Fusion Research. 9, 1203044.

Research output: Contribution to journalArticle

statistical analysis
ballistics
heat flux
turbulence
gradients
4 Citations (Scopus)

Study of non-linear coupling of fluctuations at long distance in LHD

Shigeru, I., Tokuzawa, T., Kobayashi, T., Itoh, S., Itoh, K., Ida, K., fujisawa, A., Kubo, S., Shimozuma, T., Tamura, N., Kasuya, N., Tsuchiya, H. & Nagayama, Y., Oct 1 2014, In : Nuclear Fusion. 54, 11, 114014.

Research output: Contribution to journalArticle

closures
frequency ranges
low frequencies
radii
interactions