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Author

  • Akihide Fujisawa
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)
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)
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)
2012

Evaluation of electron temperature fluctuations using a conditional technique

Yamada, S., Inagaki, S., Oldenbürger, S., Kobayashi, T., Kawashima, K., Ohyama, N., Tobimatsu, Y., Arakawa, H., Nagashima, Y., Yamada, T., Sasaki, M., Yagi, M., Kasuya, N., Fujisawa, A., Itoh, S. I. & Itoh, K., Dec 1 2012, In : Plasma and Fusion Research. 7, SPL.ISS.1, 2401133.

Research output: Contribution to journalArticle

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

2011

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)
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

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)
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)
2014

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)
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

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

2014

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

7 Citations (Scopus)
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

2016

Tomography as a diagnostic tool for plasma turbulence

Fujisawa, A., Nagashima, Y., Yamasaki, K., Inagaki, S., Onchi, T., Ohshima, S. & Shimizu, A., Jan 1 2016.

Research output: Contribution to conferencePaper

Eddy, drift wave and zonal flow dynamics in a linear magnetized plasma

Arakawa, H., Inagaki, S., Sasaki, M., Kosuga, Y., Kobayashi, T., Kasuya, N., Nagashima, Y., Yamada, T., Lesur, M., Fujisawa, A., Itoh, K. & Itoh, S. I., Sep 15 2016, In : Scientific reports. 6, 33371.

Research output: Contribution to journalArticle

14 Citations (Scopus)
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)
2012

Fluctuations with long-distance correlation in quasi-stationary and transient plasmas of LHD

Inagaki, S., Tamura, N., Tokuzawa, T., Ida, K., Kobayashi, T., Shimozuma, T., Kubo, S., Tsuchiya, H., Nagayama, Y., Kawahata, K., Sudo, S., Fujisawa, A., Itoh, K. & Itoh, S. I., Feb 1 2012, In : Nuclear Fusion. 52, 2, 023022.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2013

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)

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

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)
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)
2016

Improvement of the reynolds stress probe for end-plate biasing experiments in a cylindrical laboratory plasma

Kanzaki, T., Nagashima, Y., Inagaki, S., Kin, F., Miwa, Y., Sasaki, M., Yamada, T., Fujisawa, A., Kobayashi, T., Kasuya, N., Kosuga, Y., Itoh, S. I. & Itoh, K., Jan 1 2016, In : Plasma and Fusion Research. 11, 1201091.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2017

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)
2018

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)

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)
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)
7 Citations (Scopus)
2016

Power Balance Estimation in Long Duration Discharges on QUEST

Hanada, K., Zushi, H., Idei, H., Nakamura, K., Ishiguro, M., Tashima, S., Kalinnikova, E. I., Nagashima, Y., Hasegawa, M., Fujisawa, A., Higashijima, A., Kawasaki, S., Nakashima, H., Mitarai, O., Fukuyama, A., Takase, Y., Gao, X., Liu, H., Qian, J., Ono, M. & 1 others, Raman, R., Nov 2016, In : Plasma Science and Technology. 18, 11, p. 1069-1075 7 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)
2015

Global gas balance and influence of atomic hydrogen irradiation on the wall inventory in steady-state operation of QUEST tokamak

Kuzmin, A., Zushi, H., Takagi, I., Sharma, S. K., Rusinov, A., Inoue, Y., Hirooka, Y., Zhou, H., Kobayashi, M., Sakamoto, M., Hanada, K., Yoshida, N., Nakamura, K., Fujisawa, A., Matsuoka, K., Idei, H., Nagashima, Y., Hasegawa, M., Onchi, T., Banerjee, S. & 1 others, Mishra, K., Jul 22 2015, In : Journal of Nuclear Materials. 463, p. 1087-1090 4 p., 48824.

Research output: Contribution to journalArticle

12 Citations (Scopus)
2020

Design and Implementation of DC Pulsed Power Supply Employing Self-Excited Induction Generators and Flywheels for Toroidal Field Coils of a Tokamak Device, PLATO

Murayama, M., Kato, S., Fujisawa, A., Matsuoka, K., Tsutsui, H., Tsuji-Iio, S. & Shimada, R., Jun 2020, In : IEEE Transactions on Applied Superconductivity. 30, 4, 9042294.

Research output: Contribution to journalArticle

Electron heating of over-dense plasma with dual-frequency electron cyclotron waves in fully non-inductive plasma ramp-up on the QUEST spherical tokamak

Idei, H., Onchi, T., Mishra, K., Zushi, H., Kariya, T., Imai, T., Watanabe, O., Ikezoe, R., Hanada, K., Ono, M., Ejiri, A., Qian, J., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Matsuoka, K., Fukuyama, A., Kubo, S., Yoshikawa, M. & 6 others, Sakamoto, M., Kawasaki, S., Higashijima, A., Ide, S., Takase, Y. & Murakami, S., Jan 1 2020, In : Nuclear Fusion. 60, 1, 016030.

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)
2017

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

5 Citations (Scopus)
2013
1 Citation (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)
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)

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)
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)
2016

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)
2012

Fast visible imaging and edge turbulence analysis in QUEST

Banerjee, S., Zushi, H., Nishino, N., Nagashima, Y., Hanada, K., Ishiguro, M., Ryoukai, T., Tashima, S., Inoue, T., Nakamura, K., Idei, H., Hasegawa, M., Fujisawa, A. & Matsuoka, K., Oct 1 2012, In : Review of Scientific Instruments. 83, 10, 10E524.

Research output: Contribution to journalArticle

7 Citations (Scopus)
2016

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

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

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

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

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)