Find Research Outputs

Search in all content

Filters for Research Output

Search concepts
Selected filters

Publication Year

  • 2020
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2011

Author

  • Akihide Fujisawa
2013

Sawtooth-triggered limit-cycle oscillations and I-phase in the HL-2A tokamak

Zhao, K. J., Cheng, J., Diamond, P. H., Dong, J. Q., Yan, L. W., Hong, W. Y., Xu, M., Tynan, G., Miki, K., Huang, Z. H., Itoh, K., Itoh, S. I., Fujisawa, A., Nagashima, Y., Inagaki, S., Wang, Z. X., Wei, L., Song, X. M., Lei, G. J., Li, Q. & 5 others, Ji, X. Q., Liu, Y., Yang, Q. W., Ding, X. T. & Duan, X. R., Dec 1 2013, In : Nuclear Fusion. 53, 12, 123015.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2016

Experimental Identification of Electric Field Excitation Mechanisms in a Structural Transition of Tokamak Plasmas

Kobayashi, T., Itoh, K., Ido, T., Kamiya, K., Itoh, S. I., Miura, Y., Nagashima, Y., Fujisawa, A., Inagaki, S., Ida, K. & Hoshino, K., Aug 4 2016, In : Scientific reports. 6, 30720.

Research output: Contribution to journalArticle

12 Citations (Scopus)
2015

Tomography for local plasma turbulence measurements

Fujisawa, A., Nagashima, Y. & Inagaki, S., Jan 1 2015, In : Plasma and Fusion Research. 10, 1201080.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2018

Evaluation of measurement signal of heavy ion beam probe of energetic-particle driven geodesic acoustic modes

Sasaki, M., Itoh, K., Ido, T., Shimizu, A., Kobayashi, T., Arakawa, H., Kasuya, N., Fujisawa, A. & Itoh, S. I., Jan 1 2018, In : Plasma and Fusion Research. 13, 3403040.

Research output: Contribution to journalArticle

Open Access
2016

Structure formation in parallel ion flow and density profiles by cross-ferroic turbulent transport in linear magnetized plasma

Kobayashi, T., Inagaki, S., Kosuga, Y., Sasaki, M., Nagashima, Y., Yamada, T., Arakawa, H., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Oct 1 2016, In : Physics of Plasmas. 23, 10, 102311.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2020
2011

Method for Estimating the Wavenumber of Standing Waves Using Three Langmuir Probes

Kobayashi, T., Nagashima, Y., Inagaki, S., Arakawa, H., Sasaki, M., Yamada, T., Yagi, M., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Jun 10 2011, In : Plasma and Fusion Research. 6, 2011, 1401050.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2016
6 Citations (Scopus)
2015

Evaluation of non-linear mode coupling during end-plate biasing experiment in PANTA

Kin, F., Yamada, T., Inagaki, S., Arakawa, H., Nagashima, Y., Kasuya, N., Fujisawa, A., Nakanishi, K., Kono, H., Mizokami, T., Sasaki, M., Lesur, M., Kosuga, Y., Itoh, K. & Itoh, S. I., Jan 1 2015, In : Plasma and Fusion Research. 10, 3401043.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2014

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)
2011

Development of radially movable multichannel Reynolds stress probe system for a cylindrical laboratory plasma

Nagashima, Y., Inagaki, S., Kamakaki, K., Arakawa, H., Yamada, T., Shinohara, S., Kawai, Y., Yagi, M., Fujisawa, A., Itoh, S. I., Itoh, K. & Takase, Y., Mar 1 2011, In : Review of Scientific Instruments. 82, 3, 033503.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Observation of nonlinear coupling between low frequency coherent modes and background turbulence in LMD-U

Kobayashi, T., Inagaki, S., Arakawa, H., Oldenbürger, S., Sasaki, M., Nagashima, Y., Yamada, T., Sugita, S., Yagi, M., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Jan 1 2011, In : Plasma and Fusion Research. 6, 2401082.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2013

Spatial structures and interaction of multiple sheared flow populations in tokamak edge turbulence

Zhao, K. J., Dong, J. Q., Yan, L. W., Diamond, P. H., Cheng, J., Hong, W. Y., Huang, Z. H., Xu, M., Tynan, G. R., Itoh, K., Itoh, S. I., Fujisawa, A., Nagashima, Y., Inagaki, S., Wang, Z. X., Wei, L., Li, Q., Ji, X. Q., Huang, Y., Liu, Y. & 5 others, Zhou, J., Song, X. M., Yang, Q. W., Ding, X. T. & Duan, X. R., Aug 1 2013, In : Nuclear Fusion. 53, 8, 083011.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2015

Azimuthal inhomogeneity of turbulence structure and its impact on intermittent particle transport in linear magnetized plasmas

Kobayashi, T., Inagaki, S., Sasaki, M., Kosuga, Y., Arakawa, H., Yamada, T., Nagashima, Y., Miwa, Y., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Nov 2015, In : Physics of Plasmas. 22, 11, 112301.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2018

Experimental research plan of nonlinearity of tokamak edge turbulence in plasma turbulence observatory

Nagashima, Y. & Fujisawa, A., Aug 1 2018, Front-runners' Symposium on Plasma Physics in Honor of Professors Kimitaka Itoh and Sanae-I. Itoh. Todo, Y. & Ida, K. (eds.). American Institute of Physics Inc., 020006. (AIP Conference Proceedings; vol. 1993).

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

2011

Non-Gaussian properties of global momentum and particle fluxes in a cylindrical laboratory plasma

Nagashima, Y., Itoh, S. I., Inagaki, S., Arakawa, H., Kasuya, N., Fujisawa, A., Kamataki, K., Yamada, T., Shinohara, S., Oldenbürger, S., Yagi, M., Takase, Y., Diamond, P. H. & Itoh, K., Jul 1 2011, In : Physics of Plasmas. 18, 7, 070701.

Research output: Contribution to journalArticle

14 Citations (Scopus)
2018

Symmetry-breaking of turbulence structure and position identification in toroidal plasmas

Itoh, K., Itoh, S. I., Nagashima, Y., Yamada, T., Kosuga, Y. & Fujisawa, A., Jan 1 2018, In : Plasma and Fusion Research. 13, 1102113.

Research output: Contribution to journalArticle

Open Access
2014

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

19 Citations (Scopus)
2011

Dynamic interaction between a solitary drift wave structure and zonal flows in a linear cylindrical device

Arakawa, H., Kobayashi, T., Shigeru, I., Kasuya, N., Oldenbürger, S., Nagashima, Y., Yamada, T., Yagi, M., fujisawa, A., Itoh, K. & Itoh, S., Nov 1 2011, In : Plasma Physics and Controlled Fusion. 53, 11, 115009.

Research output: Contribution to journalArticle

14 Citations (Scopus)
2017

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

11 Citations (Scopus)
2015

Edge plasma dynamics during L-H transition 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. & Hoshino, K., Jun 1 2015, In : Nuclear Fusion. 55, 6, 063009.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2017

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)

Coexistence of driftwaves and d'angelo modes at different position and frequency in linear plasma device

Dupertuis, N., Inagaki, S., Nagashima, Y., Kosuga, Y., Kin, F., Kobayashi, T., Kasuya, N., Sasaki, M., Fujisawa, A., Tran, M. Q., Itoh, S. I. & Itoh, K., Jan 1 2017, In : Plasma and Fusion Research. 12, 1201008.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2018

Propagation direction of geodesic acoustic modes driven by drift wave turbulence

Sasaki, M., Itoh, K., Kobayashi, T., Kasuya, N., Fujisawa, A. & Itoh, S. I., Oct 3 2018, In : Nuclear Fusion. 58, 11, 112005.

Research output: Contribution to journalArticle

3 Citations (Scopus)
3 Citations (Scopus)
2016

Tomography as a promising diagnostic tool for plasma turbulence

Fujisawa, A., Nagashima, Y., Inagaki, S., Onchi, T., Ohshima, S. & Shimizu, A., Jan 11 2016, In : Plasma Physics and Controlled Fusion. 58, 2, 025005.

Research output: Contribution to journalArticle

13 Citations (Scopus)
2020

Observation of spatiotemporal structures of temperature fluctuations by using of a statistical phase detection method in a linear magnetized plasma

Kawachi, Y., Inagaki, S., Kin, F., Yamasaki, K., Kosuga, Y., Sasaki, M., Nagashima, Y., Yamada, T., Arakawa, H., Kasuya, N., Moon, C., Hasamada, K. & Fujisawa, A., May 2020, In : Plasma Physics and Controlled Fusion. 62, 5, 055011.

Research output: Contribution to journalArticle

Open Access
2014

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)
2016

Response of the far scrape-off layer plasma to strong gas puffing in the high poloidal beta configuration of the QUEST spherical tokamak

Onchi, T., Zushi, H., Mishra, K., Oyama, Y., Nagashima, Y., Hanada, K., Idei, H., Hasegawa, M., Kuzmin, A., Miura, H., Nakamura, K., Fujisawa, A. & Nagaoka, K., Sep 15 2016, In : Plasma Physics and Controlled Fusion. 58, 11, 115004.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2014

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)
2015

Development of a high-performance control system by decentralization with reflective memory on QUEST

Hasegawa, M., Nakamura, K., Zushi, H., Hanada, K., Fujisawa, A., Mitarai, O., Tokunaga, K., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H. & Higashijima, A., Oct 1 2015, In : Fusion Engineering and Design. 96-97, p. 629-632 4 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Dynamical programming based turbulence velocimetry for fast visible imaging of tokamak plasma

Banerjee, S., Zushi, H., Nishino, N., Mishra, K., Onchi, T., Kuzmin, A., Nagashima, Y., Hanada, K., Nakamura, K., Idei, H., Hasegawa, M. & Fujisawa, A., Mar 1 2015, In : Review of Scientific Instruments. 86, 3, 033505.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2017

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

2015

Observation of heat flux and plasma flow in scrape off layer in QUEST

Onchi, T., Mahira, Y., Nagaoka, K., Tashima, S., Banerjee, S., Mishra, K., Idei, H., Hanada, K., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Matsuoka, K., Kuzmin, A., Watanabe, O., Kawasaki, S., Nakashima, H. & Higashijima, A., Jul 22 2015, In : Journal of Nuclear Materials. 463, p. 428-431 4 p., 48807.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2011

Study of matrix converter as a current-controlled power supply in QUEST tokamak

Liu, X., Nakamura, K., Jiang, Y., Yoshisue, T., Mitarai, O., Hasegawa, M., Tokunaga, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Kawasaki, S., Nakashima, H., Higashijima, A. & Araki, K., Dec 1 2011, In : Plasma and Fusion Research. 6, 1 SPECIAL ISSUE, 2405137.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2014

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

4 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)
2016

Multiple wall-reflection effect in adaptive-array differential-phase reflectometry on QUEST

Idei, H., Mishra, K., Yamamoto, M. K., Fujisawa, A., Nagashima, Y., Hamasaki, M., Hayashi, Y., Onchi, T., Hanada, K. & Zushi, H., Jan 13 2016, In : Journal of Instrumentation. 11, 1, C01014.

Research output: Contribution to journalArticle

2013

Development of plasma control system for divertor configuration on QUEST

Hasegawa, M., Nakamura, K., Zushi, H., Hanada, K., Fujisawa, A., Matsuoka, K., Mitarai, O., Idei, H., Nagashima, Y., Tokunaga, K., Kawasaki, S., Nakashima, H. & Higashijima, A., Apr 10 2013, In : Fusion Engineering and Design. 88, 6-8, p. 1074-1077 4 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2011

Electron Cyclotron / Bernstein wave heating and current drive experiments using phased-array antenna in QUEST

Idei, H., Zushi, H., Hanada, K., Nakamura, K., Fujisawa, A., Hasegawa, M., Yoshida, N., Sakamoto, M., Watanebe, H., Tokunaga, K., Nagashima, Y., Ejiri, A., Sakaguchi, M., Kalinnikova, E., Ishiguro, M., Tashima, S., Fukuyama, A., Igami, H., Kubo, S., Sharma, S. K. & 14 others, Ryokai, T., Liu, H. Q., Isobe, M., Nagaoka, K., Nakanishi, H., Nishino, N., Kawasaki, S., Nakashima, H., Higashijima, A., Takase, Y., Maekawa, T., Mitarai, O., Kikuchi, M. & Toi, K., Dec 1 2011, Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference. p. 473-476 4 p. (AIP Conference Proceedings; vol. 1406).

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

1 Citation (Scopus)
2013

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., Dec 23 2013, 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013. 6635507. (2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013).

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

1 Citation (Scopus)
2014

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)
2017

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

2011
12 Citations (Scopus)
2013

New method of analysis for dynamical transport

Lhd Experiment Group, Jan 1 2013, In : Plasma and Fusion Research. 8, 1202172.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Spatiotemporal structures of edge limit-cycle oscillation before L-to-H transition 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. & Hoshino, K., Jul 17 2013, In : Physical Review Letters. 111, 3, 035002.

Research output: Contribution to journalArticle

76 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

17 Citations (Scopus)
2011

Long range temperature fluctuation in LHD

Inagaki, S., Tokuzawa, T., Itoh, K., Ida, K., Itoh, S. I., Tamura, N., Sakakibara, S., Kasuya, N., Fujisawa, A., Kubo, S., Shimozuma, T., Ido, T., Nishimura, S., Arakawa, H., Kobayashi, T., Yagi, M., Tanaka, K., Nagayama, Y., Kawahata, K., Sudo, S. & 2 others, Yamada, H. & Komori, A., Dec 1 2011, In : Plasma and Fusion Research. 6, 2011, 1402017.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2016

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