Research Output

2014

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

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., Inagaki, S., Suzuki, Y., Takahashi, H. & Takayama, M., Oct 1 2014, In : Nuclear Fusion. 54, 11, 114013.

Research output: Contribution to journalArticle

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

7 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., Dec 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 297-300 4 p.

Research output: Contribution to journalArticle

10 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

3 Citations (Scopus)

Current status of nanostructured tungsten-based materials development

Kurishita, H., Matsuo, S., Arakawa, H., Sakamoto, T., Kobayashi, S., Nakai, K., Okano, H., Watanabe, H., Yoshida, N., Torikai, Y., Hatano, Y., Takida, T., Kato, M., Ikegaya, A., Ueda, Y., Hatakeyama, M. & Shikama, T., Jan 1 2014, In : Physica Scripta. T159, 014032.

Research output: Contribution to journalConference article

46 Citations (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

1 Citation (Scopus)

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., Inagaki, S., Suzuki, Y., Takahashi, H. & Takayama, M., Jan 1 2014, In : Plasma and Fusion Research. 9, 1202053.

Research output: Contribution to journalArticle

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

2 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

3 Citations (Scopus)

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

1 Citation (Scopus)

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

Kobayashi, T., Itoh, K., Ido, T., Kamiya, K., Itoh, S. I., Miura, Y., Nagashima, Y., Fujisawa, A., Inagaki, S., Ida, K., Kasuya, N. & Hoshino, K., Jul 2014, In : Nuclear Fusion. 54, 7, 073017.

Research output: Contribution to journalArticle

18 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., Dec 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 475-479 5 p.

Research output: Contribution to journalArticle

6 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

8 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

7 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., Dec 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 440-444 5 p.

Research output: Contribution to journalArticle

18 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., Inagaki, S., De Baar, M. R. & Ida, K., Nov 1 2014, In : Physics of Plasmas. 21, 11, 112507.

Research output: Contribution to journalArticle

10 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., Inagaki, S., De Baar, M. R. & Ida, K., Nov 1 2014, In : Physics of Plasmas. 21, 11, 112508.

Research output: Contribution to journalArticle

4 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., Inagaki, S., De Baar, M. R. & Ida, K., Nov 1 2014, In : Physics of Plasmas. 21, 11, 4901311.

Research output: Contribution to journalArticle

2 Citations (Scopus)

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

Inagaki, S., Itoh, S. I., 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

13 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

5 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

11 Citations (Scopus)

Investigation of non-inductive plasma current start-up by RF on QUEST

Ishiguro, M., Hanada, K., Liu, H., Ogata, R., Isobe, M., Tashima, S., Zushi, H., Sato, K., Fujisawa, A., Nakamura, K., Idei, H., Sakamoto, M., Hasegawa, M., Takase, Y., Maekawa, T., Kishimoto, Y., Mitarai, O., Kawasaki, S., Nakashima, H. & Higashijima, A., Jan 1 2014, In : Journal of Physics: Conference Series. 511, 1, 012041.

Research output: Contribution to journalConference article

2 Citations (Scopus)

Ion temperature gradient driven turbulence with strong trapped ion resonance

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

Research output: Contribution to journalArticle

8 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

12 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

20 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

2 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

10 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

8 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

23 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

5 Citations (Scopus)

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

Tokuzawa, T., Inagaki, S., 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., May 2014, In : Physics of Plasmas. 21, 5, 055904.

Research output: Contribution to journalArticle

14 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

2 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

7 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., Inagaki, S. & Ida, K., Jan 1 2014, In : Plasma and Fusion Research. 9, 1402039.

Research output: Contribution to journalArticle

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

4 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

18 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., Jul 2014, In : Physics of Plasmas. 21, 7, 072311.

Research output: Contribution to journalArticle

7 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

5 Citations (Scopus)

Statistical analysis of ballistic propagation distance in edge turbulence

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

Research output: Contribution to journalArticle

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

5 Citations (Scopus)

Thermal imaging of plasma with a phased array antenna in QUEST

Mishra, K., Idei, H., Zushi, H., Nagata, K., Akimoto, R., Yamamoto, M. K., Hanada, K., Hasegawa, M., Nakamura, K., Fujisawa, A., Nagashima, Y., Banerjee, S., Onchi, T. & Kuzmin, A., Nov 2014, In : Review of Scientific Instruments. 85, 11, 11E808.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Two-Fluid Equilibrium Considerations of Te/Ti » 1, Collisionless ST Plasmas Sustained by RF Electron Heating

Peng, Y. K. M., Ishida, A., Takase, Y., Ejiri, A., Tsujii, N., Maekawa, T., Uchida, M., Zushi, H., Hanada, K. & Hasegawa, M., Jan 1 2014, In : Plasma and Fusion Research. 9, SpecialIssue2, 3403146.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Zero-dimensional model for the critical condition for the L-H transition in the flux-gradient relation

Itoh, S. & Itoh, K., Oct 1 2014, In : Nuclear Fusion. 54, 11, 114017.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2013

Analysis on precipitation behavior of reduced activation ferritic/martensitic steels with extraction residue tests

Nagasaka, T., Hishinuma, Y., Muroga, T., Watanabe, H., Sakasegawa, H., Tanigawa, H. & Ando, M., Oct 1 2013, In : Fusion Engineering and Design. 88, 9-10, p. 2565-2568 4 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

An assessment of limit cycle oscillation dynamics prior to L-H transition

Itoh, K., Itoh, S. I. & Fujisawa, A., Jan 1 2013, In : Plasma and Fusion Research. 8, 1102168.

Research output: Contribution to journalArticle

16 Citations (Scopus)

An overview of intrinsic torque and momentum transport bifurcations in toroidal plasmas

Diamond, P. H., Kosuga, Y., Gürcan, O. D., McDevitt, C. J., Hahm, T. S., Fedorczak, N., Rice, J. E., Wang, W. X., Ku, S., Kwon, J. M., Dif-Pradalier, G., Abiteboul, J., Wang, L., Ko, W. H., Shi, Y. J., Ida, K., Solomon, W., Jhang, H., Kim, S. S., Yi, S. & 4 others, Ko, S. H., Sarazin, Y., Singh, R. & Chang, C. S., Oct 1 2013, In : Nuclear Fusion. 53, 10, 104019.

Research output: Contribution to journalReview article

68 Citations (Scopus)

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

Matsumoto, K., Watanabe, H. & Yoshida, N., Dec 16 2013, In : Tribology Transactions. 56, 6, p. 897-907 11 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Behavior of deuterium retention and surface morphology for VPS-W/F82H

Oya, Y., Shimada, M., Tokunaga, T., Watanabe, H., Yoshida, N., Hatano, Y., Kasada, R., Nagasaka, T., Kimura, A. & Okuno, K., Feb 14 2013, In : Journal of Nuclear Materials. 442, 1-3 SUPPL.1, p. S242-S245

Research output: Contribution to journalArticle

4 Citations (Scopus)

Blob-hole structures as non-axisymmetric equilibrium solutions for potential vorticity conserving fluids

Kosuga, Y. & Diamond, P. H., Jan 1 2013, In : Plasma and Fusion Research. 8, 2403080.

Research output: Contribution to journalArticle