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  • Akihide Fujisawa
2012

QUEST experiments towards steady state operation of spherical tokamaks

Hanada, K., Zushi, H., Idei, H., Nakamura, K., Ishiguro, M., Tashima, S., Kalinnikova, E., Sakamoto, M., Hasegawa, M., fujisawa, A., Sato, K., Yoshida, N., Watanabe, H., Tokunaga, K., Nagashima, Y., Higashijima, A., Kawasaki, S., Nakashima, H., Liu, H., Mitarai, O. & 4 others, Maekawa, T., Fukuyama, A., Takase, Y. & Qian, J., Oct 5 2012, In : IEEJ Transactions on Fundamentals and Materials. 132, 7

Research output: Contribution to journalArticle

4 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)
2017

Fast algorithm for tomographic reconstruction for plasma emission

Yamasaki, K., Fujisawa, A., Nagashima, Y. & Inagaki, S., Jan 1 2017, In : Plasma and Fusion Research. 12, 1201045.

Research output: Contribution to journalArticle

2 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)
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

2012

Global measurement of Reynolds stress in a cylindrical linear plasma

Nagashima, Y., Itoh, S., Inagaki, S., Oldenbürger, S., Kobayashi, T., Kawashima, K., Ohyama, N., Tobimatsu, Y., Yamada, S., Yamashita, T., Arakawa, H., Kamataki, K., Yamada, T., Sasaki, M., Kasuya, N., Yagi, M., Fujisawa, A., Diamond, P. H. & Itoh, K., Dec 1 2012, 39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics. p. 1951-1954 4 p. (39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics; vol. 3).

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

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)

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)
2011

Study of blob-like structures in QUEST

Liu, H. Q., Hanada, K., Nishino, N., Ogata, R., Ishiguro, M., Zushi, H., Nakamura, K., Sakamoto, M., Idei, H., fujisawa, A., Hasegawa, M., Higashizono, Y., Kawasaki, S., Nakashima, H. & Higashijima, A., Aug 1 2011, In : Journal of Nuclear Materials. 415, 1 SUPPL

Research output: Contribution to journalArticle

3 Citations (Scopus)

Verification of wavelet analysis for a heat pulse propagation experiment

Kobayashi, T., Inagaki, S., Itoh, S. I., Ida, K., Oldenbürger, S., Tsuchiya, H., Nagayama, Y., Kawahata, K., Yamada, H., Sasaki, M., Fujisawa, A. & Itoh, K., Sep 1 2011, In : Plasma Physics and Controlled Fusion. 53, 9, 095012.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2013

Evaluation of excitation conditions of ITG modes in the PANTA

Miwa, Y., Kasuya, N., Sasaki, M., Inagaki, S., Itoh, K., Yagi, M., Fujisawa, A., Nagashima, Y., Lesur, M., Kobayashi, T., Yamada, S., Yamashita, T., Otsubo, S., Kakigawa, S., Mitsuzono, T., Fujino, H. & Itoh, S. I., Jan 1 2013, In : Plasma and Fusion Research. 8, 2403133.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2017
6 Citations (Scopus)
2018

Effect of magnetic shear on edge turbulence in SOL-like open field line configuration in QUEST

Banerjee, S., Zushi, H., Nishino, N., Hanada, K., Idei, H., Nakamura, K., Hasegawa, M., Fujisawa, A., Nagashima, Y., Mishra, K., Tashima, S., Onchi, T., Kuzmin, A. & Matsuoka, K., Jun 28 2018, In : Plasma Physics and Controlled Fusion. 60, 8, 085014.

Research output: Contribution to journalArticle

2011

Eddy current-adjusted plasma shape reconstruction by Cauchy condition surface method on QUEST

Nakamura, K., Jiang, Y., Liu, X. L., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Hasegawa, M., Tokunaga, K., Zushi, H., Hanada, K., Fujisawa, A., Sakamoto, M., Idei, H., Kawasaki, S., Nakashima, H., Higashijima, A. & Araki, K., Oct 1 2011, In : Fusion Engineering and Design. 86, 6-8, p. 1080-1084 5 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2013
1 Citation (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)
2015

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)
2012

A plasma shape identification with magnetic analysis for the real-time control on QUEST

Hasegawa, M., Nakamura, K., Tokunaga, K., Zushi, H., Hanada, K., fujisawa, A., Idei, H., Kawasaki, S., Nakashima, H. & Higashijima, A., Oct 5 2012, In : IEEJ Transactions on Fundamentals and Materials. 132, 7

Research output: Contribution to journalArticle

13 Citations (Scopus)
2013

Measurement of dynamical density profiles using a microwave frequency comb reflectometer

Inagaki, S., Itoh, K., Yamada, T., Itoh, S. I., Tokuzawa, T., Fujisawa, A., Kasuya, N., Sasaki, M., Nagashima, Y. & Arakawa, H., Jan 1 2013, In : Plasma and Fusion Research. 8, 1201171.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2015

Observation of parallel force balance for drift wave fluctuation by a fast voltage sweeping method in a linear plasma

Nagashima, Y., Inagaki, S., Fujisawa, A., Arakawa, H., Yamada, T., Miwa, Y., Kobayashi, T., Itoh, S. I. & Itoh, K., Jun 15 2015, In : journal of the physical society of japan. 84, 6, 063501.

Research output: Contribution to journalArticle

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)

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)
2015

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)
2012

Configuration of flows in a cylindrical plasma device

Oldenbürger, S., Uriu, K., Kobayashi, T., Inagaki, S., Sasaki, M., Nagashima, Y., Yamada, T., Fujisawa, A., Itoh, S. I. & Itoh, K., Dec 1 2012, In : Plasma and Fusion Research. 7, SPL.ISS.1, 2401146.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2019

Estimation of particle flux driven by coherent mode using of statistical conditional averaging

Kawachi, Y., Inagaki, S., Hasamada, K., Yamasaki, K., Kin, F., Kosuga, Y., Sasaki, M., Nagashima, Y., Kasuya, N., Yamada, T., Zhang, B. & Fujisawa, A., Jan 1 2019, In : Plasma and Fusion Research. 14, 1402090.

Research output: Contribution to journalArticle

Open Access
2018

Nonlinear characteristics of mediator and streamer in linear magnetized plasmas

Kin, F., Fujisawa, A., Itoh, K., Kosuga, Y., Sasaki, M., Yamada, T., Inagaki, S., Itoh, S. I., Kobayashi, T., Nagashima, Y., Kasuya, N., Arakawa, H., Yamasaki, K. & Hasamada, K., Jan 1 2018, 45th EPS Conference on Plasma Physics, EPS 2018. Berndt, J., Coda, S., Lapenta, G., Michaut, C., Weber, S. & Mantsinen, M. (eds.). European Physical Society (EPS), p. 565-568 4 p. (45th EPS Conference on Plasma Physics, EPS 2018; vol. 2018-July).

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

2019

Comparison of conditional average using threshold and template methods for quasi-periodic phenomena in plasmas

ASDEX Upgrade Team, Jan 1 2019, In : Plasma and Fusion Research. 14, 1402114.

Research output: Contribution to journalArticle

Open Access
2017

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

Extraction of nonlinear waveform in turbulent plasma

Kin, F., Itoh, K., Fujisawa, A., Kosuga, Y., Sasaki, M., Yamada, T., Inagaki, S., Itoh, S. I., Kobayashi, T., Nagashima, Y., Kasuya, N., Arakawa, H., Yamasaki, K. & Hasamada, K., Jun 1 2018, In : Physics of Plasmas. 25, 6, 062304.

Research output: Contribution to journalArticle

5 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)
2017

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)

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

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)
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

5 Citations (Scopus)
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., Inagaki, S., 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., Jan 1 2011, In : Plasma and Fusion Research. 6, 2406118.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2017

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)
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)

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

Higher harmonics in a perturbative transport experiment

Lhd Experiment Group, Jan 1 2013, In : Plasma and Fusion Research. 8, 1202173.

Research output: Contribution to journalArticle

11 Citations (Scopus)
2019
2012

Self-nonlinear coupling of long-range temperature fluctuation in Toroidal plasma

Kobayashi, T., Shigeru, I., Itoh, S., Itoh, K., Oldenbürger, S., fujisawa, A., Nagashima, Y., Ida, K., Tsuchiya, H., Nagayama, Y., Kawahata, K. & Yamada, H., Nov 1 2012, In : Plasma Physics and Controlled Fusion. 54, 11, 115004.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2011

Observation of nonlinear coupling in azimuthal wave number space in a cylindrical magnetized plasma

Kobayashi, T., Inagaki, S., Arakawa, H., Oldenburger, S., Sasaki, M., Nagashima, Y., Yamada, T., Sugita, S., Yagi, M., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Dec 1 2011, 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts. p. 676-679 4 p. (38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts; vol. 35 1).

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

Observation of long-distance radial correlation in toroidal plasma turbulence

Inagaki, S., Tokuzawa, T., Itoh, K., Ida, K., Itoh, S., Tamura, N., Sakakibara, S., Kasuya, N., Fujisawa, A., Kubo, S., Shimozuma, T., Ido, T., Nishimura, S., Arakawa, H., Kobayashi, T., Tanaka, K., Nagayama, Y., Kawahata, K., Sudo, S., Yamada, H. & 1 others, Komori, A., Sep 7 2011, In : Physical Review Letters. 107, 11, 115001.

Research output: Contribution to journalArticle

54 Citations (Scopus)
2012

Time evolution of power spectrum density in spontaneous transition in cylindrical magnetized plasma

Kobayashi, T., Inagaki, S., Oldenbürger, S., Kawashima, K., Ohyama, N., Tobimatsu, Y., Arakawa, H., Sasaki, M., Nagashima, Y., Yamada, T., Sugita, S., Yagi, M., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Dec 1 2012, In : Plasma and Fusion Research. 7, SPL.ISS.1, 2401054.

Research output: Contribution to journalArticle

2015

Heat flux and plasma flow in the far scrape-off layer of the inboard poloidal field null configuration in QUEST

Onchi, T., Zushi, H., Mishra, K., Mahira, Y., Nagaoka, K., Hanada, K., Idei, H., Hasegawa, M., Nakamura, K., Fujisawa, A., Nagashima, Y., Matsuoka, K., Tashima, S., Banerjee, S., Kuzmin, A., Kawasaki, S., Nakashima, H., Higashijima, A. & Watanabe, O., Aug 1 2015, In : Physics of Plasmas. 22, 8, 082513.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2011
12 Citations (Scopus)
2014

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)
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)
2013

Cross-field motion of plasma blob-filaments and related particle flux in an open magnetic field line configuration on QUEST

Liu, H. Q., Hanada, K., Nishino, N., Ogata, R., Ishiguro, M., Gao, X., Zushi, H., Nakamura, K., Fujisawa, A., Idei, H. & Hasegawa, M., Jan 1 2013, In : Journal of Nuclear Materials. 438, SUPPL, p. S513-S517

Research output: Contribution to journalArticle

2 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)