Research Output

2017

Fully non-inductive second harmonic electron cyclotron plasma ramp-up in the QUEST spherical tokamak

Idei, H., Kariya, T., Imai, T., Mishra, K., Onchi, T., Watanabe, O., Zushi, H., Hanada, K., Qian, J., Ejiri, A., Alam, M. M., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Matsuoka, K., Fukuyama, A., Kubo, S., Shimozuma, T., Yoshikawa, M. & 8 others, Sakamoto, M., Kawasaki, S., Nakashima, H., Higashijima, A., Ide, S., Maekawa, T., Takase, Y. & Toi, K., Oct 5 2017, In : Nuclear Fusion. 57, 12, 126045.

Research output: Contribution to journalArticle

11 Citations (Scopus)

How pattern is selected in drift wave turbulence: Role of parallel flow shear

Kosuga, Y., Dec 1 2017, In : Physics of Plasmas. 24, 12, 122305.

Research output: Contribution to journalArticle

6 Citations (Scopus)

How turbulence fronts induce plasma spin-up

Kosuga, Y., Itoh, S. I., Diamond, P. H. & Itoh, K., Mar 29 2017, In : Physical Review E. 95, 3, 031203.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Hysteresis and fast timescales in transport relations of toroidal plasmas

Itoh, K., Itoh, S. I., Ida, K., Inagaki, S., Kamada, Y., Kamiya, K., Dong, J. Q., Hidalgo, C., Evans, T., Ko, W. H., Park, H., Tokuzawa, T., Kubo, S., Kobayashi, T., Kosuga, Y., Sasaki, M., Yun, G. S., Song, S. D., Kasuya, N., Nagashima, Y. & 6 others, Moon, C., Yoshinuma, M., Makino, R., Tsujimura, T., Tsuchiya, H. & Stroth, U., Jul 28 2017, In : Nuclear Fusion. 57, 10, 102021.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Impact property of low-activation vanadium alloy NIFS-HEAT-2 after electron beam welding and neutron irradiation

Nagasaka, T., Fu, H., Kometani, N., Miyazawa, T., Muroga, T., Watanabe, H., Yamazaki, M. & Toyama, T., Nov 1 2017, In : Fusion Science and Technology. 72, 4, p. 645-651 7 p.

Research output: Contribution to journalArticle

Investigation of hydrogen recycling in long-duration discharges and its modification with a hot wall in the spherical tokamak QUEST

Hanada, K., Yoshida, N., Honda, T., Wang, Z., Kuzmin, A., Takagi, I., Hirata, T., Oya, Y., Miyamoto, M., Zushi, H., Hasegawa, M., Nakamura, K., Fujisawa, A., Idei, H., Nagashima, Y., Watanabe, O., Onchi, T., Kuroda, K., Long, H., Watanabe, H. & 7 others, Tokunaga, K., Higashijima, A., Kawasaki, S., Nagata, T., Takase, Y., Fukuyama, A. & Mitarai, O., Oct 26 2017, In : Nuclear Fusion. 57, 12, 126061.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Measurement of electron density and temperature using laser Thomson scattering in PANTA

Tomita, K., Sato, Y., Bolouki, N., Shiraishi, T., Uchino, K., Miwa, Y., Kobayashi, T. & Inagaki, S., Jan 1 2017, In : Plasma and Fusion Research. 12, 1401018.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Measurement of thickness of film deposited on the plasma-facing wall in the QUEST tokamak by colorimetry

Wang, Z., Hanada, K., Yoshida, N., Shimoji, T., Miyamoto, M., Oya, Y., Zushi, H., Idei, H., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Kawasaki, S., Higashijima, A., Nakashima, H., Nagata, T., Kawaguchi, A., Fujiwara, T., Araki, K., Mitarai, O. & 3 others, Fukuyama, A., Takase, Y. & Matsumoto, K., Sep 1 2017, In : Review of Scientific Instruments. 88, 9, 093502.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Mesoscale electric fluctuations interacting with zonal flows, magnetic fluctuations and turbulence

HL-2A team, Jun 5 2017, In : Nuclear Fusion. 57, 7, 076036.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Method for estimating harmonic frequency dependence of diffusion coefficient and convective velocity in heat pulse propagation experiment

Kobayashi, T., Itoh, K., Ida, K., Inagaki, S. & Itoh, S. I., Jul 15 2017, In : journal of the physical society of japan. 86, 7, 074501.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Modelling ion cyclotron emission from beam-injected ions in magnetic confinement fusion plasmas

Dendy, R. O., Reman, B. C. G., Akiyama, T., Chapman, S. C., Cook, J. W. S., Igami, H., Inagaki, S., Saito, K. & Yun, G. S., Jan 1 2017, 44th EPS Conference on Plasma Physics, EPS 2017. Bret, A., Fajardo, M., Westerhof, E., Melzer, A., Dromey, B. & Riconda, C. (eds.). European Physical Society (EPS), P5.145. (44th EPS Conference on Plasma Physics, EPS 2017).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Model validation for radial electric field excitation during L-H transition in JFT-2M tokamak

Kobayashi, T., Itoh, K., Ido, T., Kamiya, K., Itoh, S. I., Miura, Y., Nagashima, Y., Fujisawa, A., Inagaki, S., Ida, K. & Hoshino, K., Mar 10 2017, In : Nuclear Fusion. 57, 7, 072005.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Multiple-instabilities in magnetized plasmas with density gradient and velocity shears

Sasaki, M., Kasuya, N., Toda, S., Yamada, T., Kosuga, Y., Arakawa, H., Kobayashi, T., Inagaki, S., Fujisawa, A., Nagashima, Y., Itoh, K. & Itoh, S. I., Jan 1 2017, In : Plasma and Fusion Research. 12, 1401042.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Nonlinear coupling of driftwaves and high frequency fluctuation on PANTA

Hasamada, K., Kosuga, Y., Kin, F., Inagaki, S., Nagashima, Y., Kobayashi, T., Sasaki, M., Kasuya, N., Yamasaki, K., Itoh, S. I., Itoh, K. & Fujisawa, A., Jan 1 2017, In : Plasma and Fusion Research. 12, 1201034.

Research output: Contribution to journalArticle

Observation of subcritical geodesic acoustic mode excitation in the large helical device

Ido, T., Itoh, K., Lesur, M., Osakabe, M., Shimizu, A., Ogawa, K., Nishiura, M., Yamada, I., Yasuhara, R., Kosuga, Y., Sasaki, M., Ida, K., Inagaki, S. & Itoh, S. I., Apr 19 2017, In : Nuclear Fusion. 57, 7, 072009.

Research output: Contribution to journalArticle

2 Citations (Scopus)

On the application of cross bispectrum and cross bicoherence

Itoh, S. I., Itoh, K., Nagashima, Y. & Kosuga, Y., Jan 1 2017, In : Plasma and Fusion Research. 12, 1101003.

Research output: Contribution to journalArticle

6 Citations (Scopus)

On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers

Rice, J. E., Hughes, J. W., Diamond, P. H., Cao, N., Chilenski, M. A., Hubbard, A. E., Irby, J. H., Kosuga, Y., Lin, Y., Metcalf, I. W., Reinke, M. L., Tolman, E. A., Victora, M. M., Wolfe, S. M. & Wukitch, S. J., Jul 28 2017, In : Nuclear Fusion. 57, 11, 116004.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Overview of ASDEX upgrade results

the ASDEX Upgrade Team & EUROfusion MST1 Team, Jun 28 2017, In : Nuclear Fusion. 57, 10, 102015.

Research output: Contribution to journalReview article

Open Access
24 Citations (Scopus)

Overview of recent HL-2A experiments

Duan, X. R., Liu, Y., Xu, M., Yan, L. W., Xu, Y., Song, X. M., Dong, J. Q., Ding, X. T., Chen, L. Y., Lu, B., Liu, D. Q., Rao, J., Xuan, W. M., Yang, Q. W., Zheng, G. Y., Zou, X. L., Liu, Y. Q., Zhong, W. L., Zhao, K. J., Ji, X. Q. & 45 others, Mao, W. C., Wang, Q. M., Li, Q., Cao, J. Y., Cao, Z., Lei, G. J., Zhang, J. H., Li, X. D., Bai, X. Y., Cheng, J., Chen, W., Cui, Z. Y., Delpech, L., Diamond, P. H., Dong, Y. B., Ekedahl, A., Hoang, T., Huang, Y., Ida, K., Itoh, K., Itoh, S. I., Isobe, M., Inagaki, S., Mazon, D., Morita, S., Peysson, Y., Shi, Z. B., Wang, X. G., Xiao, G. L., Yu, D. L., Yu, L. M., Zhang, Y. P., Zhou, Y., Cui, C. H., Feng, B. B., Huang, M., Li, Y. G., Li, B., Li, G. S., Li, H. J., Li, Q., Peng, J. F., Wang, Y. Q., Yuan, B. S. & Liu, Y., Jun 28 2017, In : Nuclear Fusion. 57, 10, 102013.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Permutation entropy and statistical complexity in characterising low-aspect-ratio reversed-field pinch plasma

Onchi, T., Fujisawa, A., Sanpei, A., Himura, H. & Masamune, S., Apr 6 2017, In : Physica Scripta. 92, 5, 055601.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Phenomenological classification of turbulence states in linear magnetized plasma PANTA

Kobayashi, T., Inagaki, S., Sasaki, M., Kosuga, Y., Arakawa, H., Kin, F., Yamada, T., Nagashima, Y., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Jan 1 2017, In : Plasma and Fusion Research. 12, 1401019.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Plasma equilibrium based on RF-driven current profile without assuming nested magnetic surfaces on QUEST

Nakamura, K., Alam, M. M., Jiang, Y. Z., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Takechi, M., Hasegawa, M., Tokunaga, K., Araki, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A., Nagata, T. & 1 others, Fukuyama, A., Nov 2017, In : Fusion Engineering and Design. 123, p. 532-534 3 p.

Research output: Contribution to journalArticle

Radially distributed instabilities and nonlinear process to generate pressure variation in a torus plasma

Kasuya, N. & Yagi, M., Jan 1 2017, In : Plasma and Fusion Research. 12, 1, 1303005.

Research output: Contribution to journalArticle

Reassessment of oxidation-induced amorphization and dissolution of Nb precipitates in Zr−Nb nuclear fuel cladding tubes

Matsukawa, Y., Kitayama, S., Murakami, K., Shinohara, Y., Yoshida, K., Maeno, H., Yang, H. L., Toyama, T., Yasuda, K., Watanabe, H., Kimura, A., Muta, H., Yamanaka, S., Li, Y. F., Satoh, Y., Kano, S. & Abe, H., Apr 1 2017, In : Acta Materialia. 127, p. 153-164 12 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Response of plasma toroidal flow to the transition between nested and stochastic magnetic field in LHD

The LHD Experiment Group, May 31 2017, In : Nuclear Fusion. 57, 7, 076032.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Role of phase space structures in collisionless drift wave turbulence and impact on transport modeling

Kosuga, Y., Itoh, S. I., Diamond, P. H., Itoh, K. & Lesur, M., Mar 10 2017, In : Nuclear Fusion. 57, 7, 072006.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Spatial distribution of atomic and ion hydrogen flux and its effect on hydrogen recycling in long duration confined and non-confined plasmas

Kuzmin, A., Zushi, H., Takagi, I., Sharma, S. K., Kobayashi, M., Hirooka, Y., Onchi, T., Hanada, K., Yoshida, N., Nakamura, K., Fujisawa, A., Idei, H., Nagashima, Y., Hasegawa, M., Mutoh, T., Mishra, K. & Ohwada, H., Aug 2017, In : Nuclear Materials and Energy. 12, p. 627-632 6 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas

Zhao, K. J., Nagashima, Y., Li, F. M., Shi, Y., Diamond, P. H., Dong, J. Q., Itoh, K., Itoh, S. I., Zhuang, G., Liu, H., Chen, Z. P., Cheng, J., Nie, L., Ding, Y. H., Hu, Q. M., Chen, Z. Y., Rao, B., Cheng, Z. F., Gao, L., Zhang, X. Q. & 12 others, Yang, Z. J., Wang, N. C., Wang, L., Jin, W., Yan, W., Xu, J. Q., Wu, Y. F., Yan, L. W., Fujisawa, A., Inagaki, S., Kosuga, Y. & Sasaki, M., Sep 12 2017, In : Nuclear Fusion. 57, 12, 126006.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Topological bifurcation of helical flows in magnetized plasmas with density gradient and parallel flow shear

Sasaki, M., Kasuya, N., Itoh, K., Toda, S., Yamada, T., Kosuga, Y., Nagashima, Y., Kobayashi, T., Arakawa, H., Yamasaki, K., Fujisawa, A., Inagaki, S. & Itoh, S. I., Nov 1 2017, In : Physics of Plasmas. 24, 11, 112103.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Toroidal momentum channeling of geodesic acoustic modes driven by fast ions

Sasaki, M., Kasuya, N., Itoh, K., Kosuga, Y., Lesur, M., Hallatschek, K. & Itoh, S. I., Mar 2017, In : Nuclear Fusion. 57, 3, 036025.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Transport hysteresis of core plasma, isotope effect, and H-mode physics

Itoh, S. I., Itoh, K. & Inagaki, S., Feb 2017, In : Nuclear Fusion. 57, 2, 022003.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Turbulent transport reduction induced by transition on radial electric field shear and curvature through amplitude and cross-phase in torus plasma

Kobayashi, T., Itoh, K., Ido, T., Kamiya, K., Itoh, S. I., Miura, Y., Nagashima, Y., Fujisawa, A., Inagaki, S. & Ida, K., Dec 1 2017, In : Scientific reports. 7, 1, 14971.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Zonal flow generation in parallel flow shear driven turbulence

Kosuga, Y., Itoh, S. I. & Itoh, K., Mar 1 2017, In : Physics of Plasmas. 24, 3, 032304.

Research output: Contribution to journalArticle

7 Citations (Scopus)
2016

A branch of energetic-particle driven geodesic acoustic modes due to magnetic drift resonance

Sasaki, M., Kasuya, N., Itoh, K., Hallatschek, K., Lesur, M., Kosuga, Y. & Itoh, S. I., Oct 1 2016, In : Physics of Plasmas. 23, 10, 102501.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abrupt onset of tongue deformation and phase space response of ions in magnetically-confined plasmas

Ida, K., Kobayashi, T., Itoh, K., Yoshinuma, M., Tokuzawa, T., Akiyama, T., Moon, C., Tsuchiya, H., Inagaki, S. & Itoh, S. I., Oct 31 2016, In : Scientific reports. 6, 36217.

Research output: Contribution to journalArticle

10 Citations (Scopus)

A calibration of setting of mach probes by observing GAM oscillations

Itoh, K., Zhao, K., Dong, J., Itoh, S. I., Fujisawa, A., Inagaki, S., Sasaki, M., Nagashima, Y., Kosuga, Y., Cheng, J. & Kobayashi, T., Jan 1 2016, In : Plasma and Fusion Research. 11, 1402002.

Research output: Contribution to journalArticle

2 Citations (Scopus)

A Concept of Cross-Ferroic Plasma Turbulence

Inagaki, S., Kobayashi, T., Kosuga, Y., Itoh, S. I., Mitsuzono, T., Nagashima, Y., Arakawa, H., Yamada, T., Miwa, Y., Kasuya, N., Sasaki, M., Lesur, M., Fujisawa, A. & Itoh, K., Feb 26 2016, In : Scientific reports. 6, 22189.

Research output: Contribution to journalArticle

40 Citations (Scopus)

Adaptive-Array electron cyclotron emission diagnostics using data streaming in a software defined radio system

Idei, H., Mishra, K., Yamamoto, M. K., Hamasaki, M., Fujisawa, A., Nagashima, Y., Hayashi, Y., Onchi, T., Hanada, K. & Zushi, H., Apr 14 2016, In : Journal of Instrumentation. 11, 4, C04010.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Analysis of plasma equilibrium based on orbit-driven current density profile in steady-state plasma on QUEST

Nakamura, K., Alam, M. M., Jiang, Y. Z., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Takechi, M., Hasegawa, M., Tokunaga, K., Araki, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A., Nagata, T. & 1 others, Fukuyama, A., Jan 1 2016, In : Fusion Engineering and Design. 109-111, p. 1528-1533 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Approaches to hysteresis of transport relations in toroidal plasmas

Itoh, S. I., Inagaki, S., Dong, J. & Itoh, K., Jan 1 2016, In : Plasma and Fusion Research. 11, 1, 2503086.

Research output: Contribution to journalArticle

5 Citations (Scopus)

APTWG: The 5th Asia-Pacific Transport Working Group Meeting

Gao, X., Ghim, Y. C., Sun, Y. W., Gao, Z., Shigeru, I., Chen, W., Zhang, T. & Wang, Z. X., Feb 8 2016, In : Nuclear Fusion. 56, 3, 037001.

Research output: Contribution to journalArticle

2 Citations (Scopus)

A structural bifurcation of transport in toroidal plasmas

Itoh, K. & Itoh, S. I., Feb 19 2016, In : Plasma Physics and Controlled Fusion. 58, 4, 045017.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Bifurcation physics of magnetic islands and stochasticity explored by heat pulse propagation studies in toroidal plasmas

Ida, K., Kobayashi, T., Yoshinuma, M., Suzuki, Y., Narushima, Y., Evans, T. E., Ohdachi, S., Tsuchiya, H., Inagaki, S. & Itoh, K., Jul 29 2016, In : Nuclear Fusion. 56, 9, 092001.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Change in edge fluctuations synchronized with heat pulse in the JFT-2M tokamak

Nagashima, Y., Itoh, K., Itoh, S. I., Fujisawa, A. & Hoshino, K., Jun 15 2016, In : journal of the physical society of japan. 85, 6, 063501.

Research output: Contribution to journalReview article

Changes of particle flux during end-plate biasing experiment in PANTA

Kin, F., Yamada, T., Inagaki, S., Nagashima, Y., Arakawa, H., Kobayashi, T., Miwa, Y., Kasuya, N., Sasaki, M., Kosuga, Y., Fujisawa, A., Itoh, K. & Itoh, S. I., Sep 15 2016, In : journal of the physical society of japan. 85, 9, 093501.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Comparative studies of inner and outer divertor discharges and a fueling study in QUEST

QUEST group, Jan 1 2016, In : Fusion Engineering and Design. 109-111, p. 1365-1370 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Comparison of current density profiles based on particle orbit-driven current in steady-state plasma on QUEST

Alam, M. M., Nakamura, K., Xia, F., Mitarai, O., Hasegawa, M., Tokunaga, K., Araki, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A. & Nagata, T., Jan 1 2016, In : Fusion Engineering and Design. 109-111, p. 1624-1630 7 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Correlation of microstructural evolution in V-4Cr-4Ti by heavy ion and neutron irradiations

Muroga, T., Miyazawa, T., Nagasaka, T. & Watanabe, H., Jan 1 2016, In : Plasma and Fusion Research. 11, Specialissue1, 2405007.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Current density calculation from particle orbit in RF-driven divertor plasma on QUEST

Alam, M. M., Nakamura, K., Hasegawa, M., Tokunaga, K., Araki, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A., Xia, F. & Mitarai, O., May 31 2016, 2015 IEEE 26th Symposium on Fusion Engineering, SOFE 2015. Institute of Electrical and Electronics Engineers Inc., 7482308. (Proceedings - Symposium on Fusion Engineering; vol. 2016-May).

Research output: Chapter in Book/Report/Conference proceedingConference contribution