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2012
2 Citations (Scopus)

In-situ characterization of spurious modes in HE11 transmission lines with a 5-port coupler

Plaum, B., Kasparek, W., Lechte, C., Ruiz, J., Tretiak, D. & Idei, H., Dec 1 2012, In : EPJ Web of Conferences. 32, 04010.

Research output: Contribution to journalConference article

couplers
transmission lines
waveguides
launchers
in situ measurement
2011
1 Citation (Scopus)

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

turbulence
high speed
temporal resolution
normal density functions
cameras
2012
2 Citations (Scopus)

Quasi-optical high purity HE11-mode exciter for oversized corrugated waveguide transmission

Sakaguchi, M., Idei, H., Kubo, S., Saito, T. & Shigematsu, T., Dec 1 2012, In : Plasma and Fusion Research. 7, SPL.ISS.1, 2405037.

Research output: Contribution to journalArticle

corrugated waveguides
purity
horn antennas
mirrors
waveguides
11 Citations (Scopus)

Statistical features of coherent structures at increasing magnetic field pitch investigated using fast imaging in QUEST

Banerjee, S., Zushi, H., Nishino, N., Hanada, K., Sharma, S. K., Honma, H., Tashima, S., Inoue, T., Nakamura, K., Idei, H., Hasegawa, M. & Fujisawa, A., Dec 1 2012, In : Nuclear Fusion. 52, 12, 123016.

Research output: Contribution to journalArticle

magnetic fields
plasma slabs
moments
poisson process
kurtosis
2013
2 Citations (Scopus)

Development of full D-band corrugated horn antenna for ecrh system

Sakaguchi, M., Idei, H., Saito, T. & Shigematsu, T., Jan 1 2013, In : Plasma and Fusion Research. 8, 1405163.

Research output: Contribution to journalArticle

horn antennas
antennas
radiation
frequency ranges
optics
2011
6 Citations (Scopus)

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

Eddy currents
Plasmas
Magnetic variables measurement
Solenoids
Cyclotrons
2016
3 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

Fueling
Plasmas
Inductance
Solenoids
Electrodes
2019

High voltage electrical system of 8.56 GHz CW klystron for electron cyclotron heating on QUEST spherical tokamak

Onchi, T., Idei, H., Nakamura, K., Nagata, T., Kawasaki, S., Ashida, R., Fukuyama, M., Hasegawa, M., Ikezoe, R., Higashijima, A., Kuroda, K., Nagashima, Y. & Hanada, K., Sep 1 2019, In : Fusion Engineering and Design. 146, p. 2567-2570 4 p.

Research output: Contribution to journalArticle

Cyclotrons
Insulated gate bipolar transistors (IGBT)
Heating
Electrons
Electric potential
2011
4 Citations (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

electron cyclotron resonance
radial velocity
plasma heating
propagation
polarization (charge separation)
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

Turbulence
turbulence
Magnetic fields
shear
Plasmas
2015
3 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

programming
Velocity measurement
Turbulence
turbulence
Plasmas
6 Citations (Scopus)

Self organization of high βp plasma equilibrium with an inboard poloidal magnetic field null in QUEST

Mishra, K., Zushi, H., Idei, H., Hasegawa, M., Onchi, T., Tashima, S., Banerjee, S., Hanada, H., Togashi, H., Yamaguchi, T., Ejiri, A., Takase, Y., Nakamura, K., Fujisawa, A., Nagashima, Y. & Kuzmin, A., Aug 1 2015, In : Nuclear Fusion. 55, 8, 083009.

Research output: Contribution to journalArticle

plasma equilibrium
magnetic fields
cyclotrons
configurations
pulses
2014
4 Citations (Scopus)

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

safety factors
diamagnetism
configurations
vessels
vacuum
2015
3 Citations (Scopus)

Conceptual Design of Dual Baseline-Frequency Fast Directional Switch using Square Corrugated Waveguide Splitter/Combiner

Idei, H., Kobayashi, T., Moriyama, S., Isayama, A., Sakaguchi, M. & Kasparek, W., Jul 5 2015, In : Journal of Infrared, Millimeter, and Terahertz Waves. 36, 7, p. 662-674 13 p.

Research output: Contribution to journalArticle

corrugated waveguides
Conceptual design
Waveguides
switches
Switches
2012
12 Citations (Scopus)

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

Real time control
Plasmas
Elongation
2017
2 Citations (Scopus)

Optimized design of polarizers with low ohmic loss and any polarization state for the 28 GHz QUEST ECH/ECCD system

Tsujimura, T. I., Idei, H., Kubo, S. & Kobayashi, S., Jan 1 2017, In : Fusion Engineering and Design. 114, p. 97-101 5 p.

Research output: Contribution to journalArticle

Polarization
Mirrors
Copper
Electric lines
Wave transmission
2011
3 Citations (Scopus)

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

Cameras
cameras
Plasma heating
Langmuir probes
Electron cyclotron resonance
2012
10 Citations (Scopus)

Permeation measurements for investigating atomic hydrogen flux and wall pumping/fuelling dynamics in QUEST

Sharma, S. K., Zushi, H., Takagi, I., Hisano, Y., Shikama, T., Morita, S., Tanabe, T., Yoshida, N., Sakamoto, M., Higashizono, Y., Hanada, K., Hasegawa, M., Nakamura, K., Idei, H., Sato, K. N., Kawasaki, S., Nakashima, H., Higashijima, A., Nakashima, Y., Hatano, Y. & 6 others, Sagara, A., Nakamura, Y., Ashikawa, N., Maekawa, T., Kishimoto, Y. & Takase, Y., Jan 1 2012, In : Journal of Nuclear Materials. 420, 1-3, p. 83-93 11 p.

Research output: Contribution to journalArticle

Fueling
refueling
Permeation
Hydrogen
pumping
2011
2 Citations (Scopus)

First ohmic discharge assisted with RF power in QUEST spherical tokamak

Mitarai, O., Nakamura, K., Tashima, S., Hasegawa, M., Idei, H., Sakamoto, M., Hanada, K., Zushi, H., Sato, K., Ishiguro, M., Liu, H. Q., Higashizono, Y., Higashijima, A., Nakashima, H., Kawasaki, S., Takase, Y., Maekawa, T. & Nishino, N., Dec 1 2011, In : Plasma and Fusion Research. 6, 2011, 1402003.

Research output: Contribution to journalArticle

plasma currents
coils
cancellation
cyclotrons
electrons
2015
6 Citations (Scopus)

Recent upgrading of ECRH system and studies to improve ECRH performance in the LHD

Lhd Experiment Group, Mar 12 2015, In : EPJ Web of Conferences. 87, 02011.

Research output: Contribution to journalConference article

upgrading
coupled modes
plasma interactions
ray tracing
refraction
2014
4 Citations (Scopus)

Adaptive array technique for differential-phase reflectometry in QUEST

Idei, H., Nagata, K., Mishra, K., Yamamoto, M. K., Itado, T., Akimoto, R., Hanada, K. & Zushi, H., Nov 1 2014, In : Review of Scientific Instruments. 85, 11, 11D842.

Research output: Contribution to journalArticle

Antenna phased arrays
Wave effects
antennas
Launching
phased arrays
2016
2 Citations (Scopus)

Comparison between Full Wave and ray-tracing calculations to examine scenarios for electron bernstein wave heating in LHD

Igami, H., Fukuyama, A., Idei, H., Nagasaki, K., Goto, Y., Kubo, S., Shimozuma, T., Yoshimura, Y., Takahashi, H., Tsujimura, T. I. & Makino, R., Jan 1 2016, In : Plasma and Fusion Research. 11, 1, 2403098.

Research output: Contribution to journalArticle

ray tracing
heating
electrons
trajectories
cut-off
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

Orbits
Current density
Plasmas
Hamiltonians
MATLAB
2012
4 Citations (Scopus)

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

Plasmas
Electron cyclotron resonance
Experiments
2015
6 Citations (Scopus)

Optimization of the high harmonic ECRH scenario to extend a heating plasma parameter range in LHD

The LHD Experiment Group, Jun 1 2015, In : Nuclear Fusion. 55, 6, 063035.

Research output: Contribution to journalArticle

plasma heating
electron cyclotron resonance
injection
harmonics
optimization
2013
1 Citation (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., 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

Plasmas
Orbits
Anisotropy
Electrons
2014
1 Citation (Scopus)

Electron Bernstein wave heating and emission measurement through the very narrow O-X-B mode conversion window in the LHD

Igami, H., Kubo, S., Shimozuma, T., Yoshimura, Y., Takahashi, H., Nishiura, M., Ogasawara, S., Makino, R., Idei, H., Nagasaki, K., Seki, T., Osakabe, M. & Mutoh, T., Jan 1 2014, Radiofrequency Power in Plasmas - Proceedings of the 20th Topical Conference. American Institute of Physics Inc., Vol. 1580. p. 490-493 4 p.

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

heating
antennas
electrons
cyclotrons
predictions
7 Citations (Scopus)

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

Antenna phased arrays
Infrared imaging
phased arrays
Electron emission
antennas

Determination of waveguide mode content using irradiance moments

Jawla, S. K., Shapiro, M. A., Idei, H. & Temkin, R. J., Nov 13 2014, 2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014. IEEE Computer Society, 6956423. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

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

Waveguides
2016
4 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

Plasmas
Control systems
Fueling
Low pass filters
Digital filters
2017
11 Citations (Scopus)

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

plasma currents
ramps
cyclotrons
harmonics
electrons
2018

Electron Bernstein wave detection by sub-Tera-Hz scattering in the QUEST

Kubo, S., Idei, H., Tatematsu, Y., Saito, T. & Iizawa, M., Oct 25 2018, 2018 43rd International Conference on Infrared Millimeter and Terahertz Waves, IRMMW-THz 2018. IEEE Computer Society, 8510425. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; vol. 2018-September).

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

Scattering
Electrons
Radiation
Heating
2013
24 Citations (Scopus)

Extension of operation regimes and investigation of three-dimensional currentless plasmas in the Large Helical Device

Kaneko, O., Yamada, H., Inagaki, S., Jakubowski, M., Kajita, S., Kitajima, S., Kobayashi, Koga, K., Morisaki, T., Morita, S., Mutoh, T., Sakakibara, S., Suzuki, Y., Takahashi, H., Tanaka, K., Toi, K., Yoshimura, Y., Akiyama, T., Asahi, Y., Ashikawa, N. & 145 others, Chikaraishi, H., Cooper, A., Darrow, D. S., Drapiko, E., Drewelow, P., Du, X., Ejiri, A., Emoto, M., Evans, T., Ezumi, N., Fujii, K., Fukuda, T., Funaba, H., Furukawa, M., Gates, D. A., Goto, M., Goto, T., Guttenfelder, W., Hamaguchi, S., Hasuo, M., Hino, T., Hirooka, Y., Ichiguchi, K., Ida, K., Idei, H., Ido, T., Igami, H., Ikeda, K., Imagawa, S., Imai, T., Isobe, M., Itagaki, M., Ito, T., Itoh, K., Itoh, S., Iwamoto, A., Kamiya, K., Kariya, T., Kasahara, H., Kasuya, N., Kato, D., Kato, T., Kawahata, K., Koike, F., Kubo, S., Kumazawa, R., Kuwahara, D., Lazerson, S., Lee, H., Masuzaki, S., Matsuoka, S., Matsuura, H., Matsuyama, A., Michael, C., Mikkelsen, D., Mitarai, O., Mito, T., Miyazawa, J., Motojima, G., Mukai, K., Murakami, A., Murakami, I., Murakami, S., Muroga, T., Muto, S., Nagaoka, K., Nagasaki, K., Nagayama, Y., Nakajima, N., Nakamura, H., Nakamura, Y., Nakanishi, H., Nakano, H., Nakano, T., Narihara, K., Narushima, Y., Nishimura, K., Nishimura, S., Nishiura, M., Nunami, Y. M., Obana, T., Ogawa, K., Ohdachi, S., Ohno, N., Ohyabu, N., Oishi, T., Okamoto, M., Okamoto, A., Osakabe, M., Oya, Y., Ozaki, T., Pablant, N., Peterson, B. J., Sagara, A., Saito, K., Sakamoto, R., Sakaue, H., Sasao, M., Sato, K., Sato, M., Sawada, K., Seki, R., Seki, T., Sergeev, V., Sharapov, S., Sharov, I., Shimizu, A., Shimozuma, T., Shiratani, M., Shoji, M., Sudo, S., Sugama, H., Suzuki, C., Takahata, K., Takeiri, Y., Takemura, Y., Takeuchi, M., Tamura, H., Tamura, N., Tanaka, H., Tanaka, T., Tingfeng, M., Todo, Y., Tokitani, M., Tokunaga, K., Tokuzawa, T., Tsuchiya, H., Tsumori, K., Ueda, Y., Vyacheslavov, L., Watanabe, K. Y., Watanabe, T., Watanabe, T. H., Wieland, B., Yamada, I., Yamada, S., Yamamoto, S., Yanagi, N., Yasuhara, R., Yokoyama, M., Yoshida, N., Yoshimura, S., Yoshinaga, T., Yoshinuma, M. & Komori, A., Oct 1 2013, In : Nuclear Fusion. 53, 10, 104015.

Research output: Contribution to journalArticle

ion temperature
pellets
injection
baffles
active control
2015
19 Citations (Scopus)

Flow damping due to stochastization of the magnetic field

Ida, K., Yoshinuma, M., Tsuchiya, H., Kobayashi, T., Suzuki, C., Yokoyama, M., Shimizu, A., Nagaoka, K., Inagaki, S., Itoh, K., Akiyama, T., Emoto, M., Evans, T., Dinklage, A., Du, X., Fujii, K., Goto, M., Goto, T., Hasuo, M., Hidalgo, C. & 101 others, Ichiguchi, K., Ishizawa, A., Jakubowski, M., Kamiya, K., Kasahara, H., Kawamura, G., Kato, D., Kobayashi, M., Morita, S., Mukai, K., Murakami, I., Murakami, S., Narushima, Y., Nunami, M., Ohdach, S., Ohno, N., Osakabe, M., Pablant, N., Sakakibara, S., Seki, T., Shimozuma, T., Shoji, M., Sudo, S., Tanaka, K., Tokuzawa, T., Todo, Y., Wang, H., Yamada, H., Takeiri, Y., Mutoh, T., Imagawa, S., Mito, T., Nagayama, Y., Watanabe, K. Y., Ashikawa, N., Chikaraishi, H., Ejiri, A., Furukawa, M., Fujita, T., Hamaguchi, S., Igami, H., Isobe, M., Masuzaki, S., Morisaki, T., Motojima, G., Nagasaki, K., Nakano, H., Oya, Y., Suzuki, Y., Sakamoto, R., Sakamoto, M., Sanpei, A., Takahashi, H., Tokitani, M., Ueda, Y., Yoshimura, Y., Yamamoto, S., Nishimura, K., Sugama, H., Yamamoto, T., Idei, H., Isayama, A., Kitajima, S., Masamune, S., Shinohara, K., Bawankar, P. S., Bernard, E., Von Berkel, M., Funaba, H., Huang, X. L., Ii, T., Ido, T., Ikeda, K., Kamio, S., Kumazawa, R., Moon, C., Muto, S., Miyazawa, J., Ming, T., Nakamura, Y., Nishimura, S., Ogawa, K., Ozaki, T., Oishi, T., Ohno, M., Pandya, S., Seki, R., Sano, R., Saito, K., Sakaue, H., Takemura, Y., Tsumori, K., Tamura, N., Tanaka, H., Toi, K., Wieland, B., Yamada, I., Yasuhara, R., Zhang, H., Kaneko, O. & Komori, A., Jan 8 2015, In : Nature communications. 6, 5816.

Research output: Contribution to journalArticle

Magnetic Fields
Damping
damping
Magnetic fields
magnetic fields
2019

Quasi-optical polarizer system for ECHCD experiments in the QUEST

Fukuyama, M., Idei, H., Tsujimura, T. I., Kubo, S., Kobayashi, S., Yunoki, M., Onchi, T. & Ikezoe, R., Sep 2019, In : Fusion Engineering and Design. 146, p. 1437-1440 4 p.

Research output: Contribution to journalArticle

Cyclotrons
Optical systems
Electric lines
Mirrors
Polarization

28-GHz ECHCD system with beam focusing launcher on the QUEST spherical tokamak

Idei, H., Onchi, T., Kariya, T., Tsujimura, T. I., Kubo, S., Kobayashi, S., Sakaguchi, M., Imai, T., Hasegawa, M., Nakamura, K., Mishra, K., Fukuyama, M., Yunoki, M., Kojima, S., Watanabe, O., Kuroda, K., Hanada, K., Nagashima, Y., Ejiri, A., Matsumoto, N. & 7 others, Ono, M., Higashijima, A., Nagata, T., Shimabukoro, S., Takase, Y., Fukuyama, A. & Murakami, S., Jan 1 2019, In : Fusion Engineering and Design.

Research output: Contribution to journalArticle

Cyclotrons
Plasmas
Electrons
Electron cyclotron resonance
Test facilities
2011
3 Citations (Scopus)

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

rectifiers
power supplies
converters
matrices
unity
2014
16 Citations (Scopus)

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

ramps
electron pressure
magnetic mirrors
magnetic fields
cyclotrons
2012

The role of energetic electrons on non-inductive current start-up and formation of an inboard poloidal field null configuration in the spherical tokamak QUEST

Tashima, S., Zushi, H., Isobe, M., Idei, H., Okamura, S., Hanada, K., Nakamura, K., Fujisawa, A., Matsuoka, K., Hasegawa, M., Nagashima, Y., Ishiguro, M., Kawasaki, S., Nakashima, H. & Higashijima, A., Dec 1 2012, 39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics. p. 305-308 4 p. (39th EPS Conference on Plasma Physics 2012, EPS 2012 and the 16th International Congress on Plasma Physics; vol. 1).

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

configurations
electrons
2014
2 Citations (Scopus)

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

plasma control
image filters
magnetic signals
computer vision
magnetic flux
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

Reflectometry
Fast Fourier transform
Fast Fourier transforms
Derivatives
computer programs
2012
7 Citations (Scopus)

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

Turbulence
turbulence
Imaging techniques
plasma slabs
Plasmas
2013

In-situ real-time characterization of spurious modes in HE11 transmission lines with a mitrebend hole coupler

Plaum, B., Kasparek, W., Lechte, C., Ruiz, J., Idei, H., Tretiak, D. & Popovic, Z., Dec 1 2013, 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013. 6665625. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

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

Electric lines
Mirrors
Waveguides
Microwaves
2012
3 Citations (Scopus)

Conceptual design and prototype performance of phased-array antenna for EBWH/CD experiments in QUEST

Idei, H., Sakaguchi, M., Nagata, K., Hanada, K., Zushi, H., Nakamura, K., Hasegawa, M., Sato, K., Sakamoto, M., Kawasaki, S., Nakashima, H. & Higashijima, A., Oct 5 2012, In : IEEJ Transactions on Fundamentals and Materials. 132, 7, p. 511-516+9

Research output: Contribution to journalArticle

Antenna phased arrays
Conceptual design
Plasmas
Heating
Electrons
2014
7 Citations (Scopus)

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

turbulence
probability density functions
vessels
gradients
kurtosis
2019

Prototype phased-array patch loop antennae for electron cyclotron emission diagnostics

Fukuyama, M., Idei, H., Yunoki, M., Ashida, R., Ogata, D., Ikezoe, R. & Onchi, T., Jan 1 2019, In : Plasma and Fusion Research. 14, 3402111.

Research output: Contribution to journalArticle

Open Access
loop antennas
patch antennas
phased arrays
cyclotrons
prototypes
2011

Measurement of the electron bernstein wave emission with one of the power transmission lines for ech in LHD

Igami, H., Idei, H., Kubo, S., Yoshimura, Y., Shimozuma, T. & Takahashi, H., Aug 1 2011, In : Plasma Science and Technology. 13, 4, p. 405-409 5 p.

Research output: Contribution to journalArticle

power transmission
transmission lines
electrons
electron cyclotron heating
frequency ranges
2015
1 Citation (Scopus)

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

Plasma flow
magnetohydrodynamic flow
Heat flux
heat flux
Langmuir probes
2 Citations (Scopus)

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

magnetohydrodynamic flow
heat flux
configurations
oscillations
supersonic flow
2016
2 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

Orbits
Current density
Plasmas
Cyclotrons
Electrons