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  • Akihide Fujisawa
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)
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)
2012

ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST

Idei, H., Zushi, H., Hanada, K., Kalinnikova, E., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Matsuoka, K., Kariya, T., Imai, T., Minami, R., Yoshida, N., Sakamoto, M., Watanabe, H., Tokunaga, K., Ejiri, A., Sakaguchi, M., Ishiguro, M., Tashima, S. & 15 others, Fukuyama, A., Igami, H., Kubo, S., 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 2012, In : Plasma and Fusion Research. 7, SPL.ISS.1, 2402112.

Research output: Contribution to journalArticle

10 Citations (Scopus)
2013

Turbulence velocimetry of tangential fast imaging data on QUEST

Banerjee, S., Zushi, H., Nishino, N., Nagashima, Y., Hanada, K., Tashima, S., Inoue, T., Nakamura, K., Idei, H., Hasegawa, M., Fujisawa, A. & Matsuoka, K., Jan 1 2013, In : Plasma and Fusion Research. 8, 2402098.

Research output: Contribution to journalArticle

2014

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

4 Citations (Scopus)
2011

Statistical interpretation of the density fluctuations from the high-speed visible images of edge turbulence on QUEST

Banerjee, S., Zushi, H., Nishino, N., Hanada, K., Liu, H. Q., Ishiguro, M., Ryoukai, T., Tashima, S., Nakamura, K., Idei, H., Hasegawa, M. & Fujisawa, A., Nov 1 2011, In : IEEE Transactions on Plasma Science. 39, 11 PART 1, p. 3006-3007 2 p., 6008663.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2016

Guiding Center Orbit Calculation for Evaluating the Current Density Distributions of the Electrons in Electron Cyclotron Heating on QUEST

Alam, M. M., Nakamura, K., Idei, H., Hasegawa, M., Tokunaga, K., Araki, K., Hanada, K., Fujisawa, A., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A., Xia, F. & Mitarai, O., Sep 2016, In : IEEE Transactions on Plasma Science. 44, 9, p. 1666-1671 6 p., 7482769.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2012

On influences of long-range fluctuations on transport in Large Helical Device plasmas

Itoh, K., Itoh, S. I., Inagaki, S., Kobayashi, T., Fujisawa, A., Nagashima, Y., Oldenbürger, S., Ida, K., Tokuzawa, T., Nagayama, Y., Kawahata, K. & Yamada, H., Sep 1 2012, In : Plasma Physics and Controlled Fusion. 54, 9, 095016.

Research output: Contribution to journalArticle

18 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)
2019

Spatial structure of low-frequency fluctuations throughout the transition of poloidal flow velocity in edge plasmas of LHD

Moon, C., Kobayashi, T., Ida, K., Tokuzawa, T., Hidalgo, C., Yoshinuma, M., Ogawa, K., Itoh, K. & Fujisawa, A., Sep 1 2019, In : Physics of Plasmas. 26, 9, 092302.

Research output: Contribution to journalArticle

Open Access
2012

Observations of intermittent structures in the periphery of a cylindrical linear plasma in panta

Ohyama, N., Fujisawa, A., Inagaki, S., Nagashima, Y., Oldenbürger, S., Kobayashi, T., Kawashima, K., Tobimatsu, Y., Yamashita, T., Yamada, S., Arakawa, H., Yamada, T., Yagi, M., Kasuya, N., Sasaki, M., Itoh, S. I. & Itoh, K., Dec 1 2012, In : Plasma and Fusion Research. 7, 2012, 1201025.

Research output: Contribution to journalArticle

3 Citations (Scopus)
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)

Investigations of the radial propagation of blob-like structure in a non-confined electron cyclotron resonance heated plasma on Q-shu University Experiment with a Steady-State Spherical Tokamak

Ogata, R., Hanada, K., Nishino, N., Liu, H. Q., Zushi, H., Ishiguro, M., Ikeda, T., Nakamura, K., Fujisawa, A., Idei, H., Hasegawa, M., Kawasaki, S., Nakashima, H. & Higashijima, A., Sep 1 2011, In : Physics of Plasmas. 18, 9, 092306.

Research output: Contribution to journalArticle

4 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

Evaluation of electron temperature fluctuations using two different probe techniques in Plasma Assembly For Nonlinear Turbulence Analysis (PANTA)

Kawashima, K., Miyoshi, Y., Oldenbürger, S., Shigeru, I., Arakawa, H., Nagashima, Y., Yamada, T., Sasaki, M., Kobayashi, T., Uriu, K., Sugita, S., Yagi, M., Kasuya, N., fujisawa, A., Itoh, S. I. & Itoh, K., Dec 1 2011, In : Plasma and Fusion Research. 6, 1 SPECIAL ISSUE, 2402118.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2020
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)

Current status and prospect of plasma control system for steady-state operation on QUEST

Hasegawa, M., Nakamura, K., Zushi, H., Hanada, K., Fujisawa, A., Tokunaga, K., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H. & Higashijima, A., Nov 15 2016, In : Fusion Engineering and Design. 112, p. 699-702 4 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2012

Dynamics of particle flux in a cylindrical magnetized plasma

Oldenbürger, S., Inagaki, S., Kobayashi, T., Arakawa, H., Ohyama, N., Kawashima, K., Tobimatsu, Y., Fujisawa, A., Itoh, K. & Itoh, S. I., May 1 2012, In : Plasma Physics and Controlled Fusion. 54, 5, 055002.

Research output: Contribution to journalArticle

25 Citations (Scopus)
2013

On turbulence-correlation analysis based on correlation reflectometry

Teplova, N., Itoh, K., Itoh, S. I., Gusakov, E., Heuraux, S., Inagaki, S., Sasaki, M., Kobayashi, T., Nagashima, Y., Oldenbürger, S. & Fujisawa, A., Apr 1 2013, In : Physica Scripta. 87, 4, 045502.

Research output: Contribution to journalArticle

4 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)
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

Direct measurement of energetic electron flow in Q-shu University experiment with steady-state spherical tokamak

Ishiguro, M., Hanada, K., Liu, H., Zushi, H., Yoshida, N., Tokunaga, T., Nakamura, K., Fujisawa, A., Idei, H., Sakamoto, M., Hasegawa, M., Tashima, S., Takase, Y., Maekawa, T., Kishimoto, Y., Mitarai, O., Kawasaki, S., Nakashima, H. & Higashijima, A., Nov 1 2011, In : Review of Scientific Instruments. 82, 11, 113509.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2012

Statistical analysis of the convective intermittent transport at the edge region of QUEST

Banerjee, S., Zushi, H., Nishino, N., Hanada, K., Kumar Sharma, S., Inoue, T., Liu, H., Ishiguro, M., Ryokai, T., Tashima, S., Nakamura, K., Idei, H., Hasegawa, M., Fujisawa, A. & Matsuoka, K., Oct 5 2012, In : IEEJ Transactions on Fundamentals and Materials. 132, 7, p. 545-554+16

Research output: Contribution to journalArticle

2016

Hydrogen flux measurements with permeation probes in spherical tokamak QUEST

Kuzmin, A., Zushi, H., Takagi, I., Sharma, S. K., Hirooka, Y., Kobayashi, M., Sakamoto, M., Hanada, K., Onchi, T., Oyama, Y., Youshida, N., Nakamura, K., Fujisawa, A., Idei, H., Nagashima, Y., Hasegawa, M. & Mishra, K., Jul 1 2016, In : Vacuum. 129, p. 178-182 5 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2015

Application of microwave frequency comb for plasma reflectometry

Shigeru, I., Tokuzawa, T., Mizokami, T., Yamada, T., Nagashima, Y. & fujisawa, A., Jan 1 2015.

Research output: Contribution to conferencePaper

Comparison between non-inductive plasma current start-up using ECRH with and without fundamental resonance on QUEST

Miura, H., Hanada, K., Zushi, H., Nakamura, K., Fujisawa, A., Idei, H., Nagashima, Y., Hasegawa, M., Nakashima, H., Kawasaki, S., Higashijima, A., Mitarai, O., Fukuyama, A. & Takase, Y., Jan 1 2015, In : Plasma and Fusion Research. 10, 3402066.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2013

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)
2016

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)
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)
2015

Perspective of negative triangularity tokamak as fusion energy system

Kikuchi, M., Medvedev, S., Takizuka, T., Fasoli, A., Wu, Y., Diamond, P., Duan, X., Kishimoto, Y., Hanada, K., Villard, L., Sauter, O., Coda, S., Duval, B., Reimerdes, H., Brunner, S., Merlo, G., Jiang, J., Wang, M., Ni, M., Chen, D. & 30 others, Du, H., Duan, W., Hou, Y., Ivanov, A., Martynov, A., Poshekhonov, Y., Ueda, Y., Yan, L., Song, X., Zheng, G., Liu, J., Nagasaki, K., Imadera, K., Mishra, K., Fujisawa, A., Nakamura, K., Zushi, H., Pueschel, M., Xu, X., Zhu, P., Told, D., Li, G. Q., Furukawa, M., Ozeki, T., Shimizu, K., Kawashima, K., Urano, H., Honda, M., Ando, T. & Kuriyama, M., Jan 1 2015.

Research output: Contribution to conferencePaper

1 Citation (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)
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)
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

Streamer structures in experiment and modeling

Yamada, T., Sasaki, M., Kasuya, N., Nagashima, Y., Inagaki, S., Kobayashi, T., Yagi, M., Fujisawa, A., Itoh, S. I. & Itoh, K., Jun 24 2013, In : Plasma and Fusion Research. 8, SPL.ISS.1, 2401022.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2012

Bi-coherence analysis of fluctuations with long distance correlation in toroidal plasmas

Shigeru, I., Kobayashi, T., Itoh, K., Tokuzawa, T., Itoh, S., Ida, K., Tamura, N., Kasuya, N., fujisawa, A., Kubo, S., Shimozuma, T., Yagi, M., Tanaka, K., Nagayama, Y., Kawahata, K. & Yamada, H., Mar 1 2012, In : journal of the physical society of japan. 81, 3, 034501.

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

2016
6 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

13 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

2013

How is turbulence intensity determined by macroscopic variables in a toroidal plasma?

Inagaki, S., Tokuzawa, T., Tamura, N., Itoh, S. I., Kobayashi, T., Ida, K., Shimozuma, T., Kubo, S., Tanaka, K., Ido, T., Shimizu, A., Tsuchiya, H., Kasuya, N., Nagayama, Y., Kawahata, K., Sudo, S., Yamada, H., Fujisawa, A. & Itoh, K., Nov 1 2013, In : Nuclear Fusion. 53, 11, 113006.

Research output: Contribution to journalArticle

37 Citations (Scopus)
2017

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)

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

10 Citations (Scopus)
6 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

Three-dimensional structure of the streamer in linear plasmas

Yamada, T., Inagaki, S., Sasaki, M., Nagashima, Y., Kin, F., Arakawa, H., Kobayashi, T., Yamasaki, K., Kasuya, N., Kosuga, Y., Fujisawa, A., Itoh, K. & Itoh, S. I., Jan 1 2018, In : journal of the physical society of japan. 87, 3, 034501.

Research output: Contribution to journalArticle

1 Citation (Scopus)
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

13 Citations (Scopus)
2018

Quantification of Turbulent Driving Forces for the Geodesic Acoustic Mode in the JFT-2M Tokamak

Kobayashi, T., Sasaki, M., Ido, T., Kamiya, K., Miura, Y., Nagashima, Y., Ida, K., Inagaki, S., Fujisawa, A., Itoh, S. I. & Itoh, K., Jan 26 2018, In : Physical Review Letters. 120, 4, 045002.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Density profile measurement with a heavy ion beam probe in a toroidal plasma of the compact helical system

Shimizu, A., Fujisawa, A., Ohshima, S., Nakano, H., Minami, T., Isobe, M., Okamura, S. & Matsuoka, K., Nov 1 2018, In : Review of Scientific Instruments. 89, 11, 113507.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Past and present experiments toward PLATO project

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., 020011. (AIP Conference Proceedings; vol. 1993).

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

2 Citations (Scopus)