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Research Output 1996 2019

  • 837 Citations
  • 13 h-Index
  • 127 Article
  • 17 Conference contribution
  • 5 Conference article
  • 2 Comment/debate
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Article
2019

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
1 Citation (Scopus)

Estimation of fuel particle balance in steady state operation with hydrogen barrier model

Hanada, K., Yoshida, N., Takagi, I., Hirata, T., Hatayama, A., Okamoto, K., Oya, Y., Shikama, T., Wang, Z., Long, H., Huang, C., Oya, M., Idei, H., Nagashima, Y., Onchi, T., Hasegawa, M., Nakamura, K., Zushi, H., Kuroda, K., Kawasaki, S. & 10 others, Higashijima, A., Nagata, T., Shimabukuro, S., Takase, Y., Murakami, S., Gao, X., Liu, H., Qian, J., Raman, R. & Ono, M., May 1 2019, In : Nuclear Materials and Energy. 19, p. 544-549 6 p.

Research output: Contribution to journalArticle

Open Access
Hydrogen
hydrogen
Plasmas
Carrier concentration
Metals

HFS injection of X-mode for EBW conversion in QUEST

Elserafy, H., Hanada, K., Kuroda, K., Idei, H., Yoneda, R., Huang, C., Kojima, S., Hasegawa, M., Nagashima, Y., Onchi, T., Ikezoe, R., Higashijima, A., Nagata, T., Kawasaki, S., Shimabukuro, S., Bertelli, N. & Ono, M., Jan 1 2019, In : Plasma and Fusion Research. 14, 1, 1205038.

Research output: Contribution to journalArticle

injection
electrons
plasma heating
plasma currents
vessels

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., Jan 1 2019, In : Fusion Engineering and Design.

Research output: Contribution to journalArticle

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

Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST

Nakamura, K., Alam, M. M., Jiang, Y. Z., Mitarai, O., Takechi, M., Hasegawa, M., Tokunaga, K., Hanada, K., Idei, H., Nagashima, Y., Onchi, T., Kuroda, K., Watanabe, O., Higashijima, A., Nagata, T., Shimabukuro, S., Kawasaki, S. & Fukuyama, A., Jan 1 2019, In : Fusion Engineering and Design.

Research output: Contribution to journalArticle

Plasmas
Current density
Fluxes
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

Heat loading behavior and thermomechanical analyses on plasma spray tungsten coated reduced-activation ferritic/martensitic steel

Tokunaga, K., Hotta, T., Araki, K., Kurumada, A., Tokitani, M., Masuzaki, S., Ezato, K., Suzuki, S., Enoeda, M., Akiba, M., Hasegawa, M. & Nakamura, K., Nov 1 2018, In : Fusion Engineering and Design. 136, p. 1624-1628 5 p.

Research output: Contribution to journalArticle

Martensitic steel
Tungsten
Plasma spraying
Ferritic steel
Chemical activation
3 Citations (Scopus)

Initial results from solenoid-free plasma start-up using Transient CHI on QUEST

Kuroda, K., Raman, R., Hanada, K., Hasegawa, M., Onchi, T., Ono, M., Nelson, B. A., Jarboe, T. R., Nagata, M., Mitarai, O., Nakamura, K., Idei, H., Rogers, J., Kawasaki, S., Nagata, T., Kuzmin, A., Kojima, S., Huang, C., Watanabe, O., Higashijima, A. & 3 others, Takase, Y., Fukuyama, A. & Murakami, S., Sep 14 2018, In : Plasma Physics and Controlled Fusion. 60, 11, 115001.

Research output: Contribution to journalArticle

Solenoids
solenoids
injection
Plasmas
Electrodes
2 Citations (Scopus)

Modification of plasma control system and hot-wall temperature control system for long-duration plasma sustainment in QUEST

Hasegawa, M., Nakamura, K., Hanada, K., Kawasaki, S., Kuzmin, A., Idei, H., Tokunaga, K., Nagashima, Y., Onchi, T., Kuroda, K., Watanabe, O., Higashijima, A. & Nagata, T., Apr 1 2018, In : Fusion Engineering and Design. 129, p. 202-206 5 p.

Research output: Contribution to journalArticle

Temperature control
Plasmas
Control systems
Facings
Cooling systems
1 Citation (Scopus)

Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas

Yoneda, N., Shikama, T., Zushi, H., Hanada, K., Fujikawa, A., Onchi, T., Kuroda, K., Nii, K., Hasuo, M., Hasegawa, M., Idei, H., Nakamura, K., Nagashima, Y., Higashijima, A. & Nagata, T., Jan 1 2018, In : Plasma and Fusion Research. 13, 3402087.

Research output: Contribution to journalArticle

Open Access
electron cyclotron resonance
flow velocity
impurities
magnetic fields
ions
2017
7 Citations (Scopus)

Current start-up using the new CHI system

Kuroda, K., Raman, R., Hanada, K., Hasegawa, M., Onchi, T., Ono, M., Jaboe, T., Nelson, B. A., Nagata, M., Mitarai, O., Nakamura, K., Idei, H., Rogers, J., Kawasaki, S., Nagata, T., Kuzmin, A., Kojima, S., Watanabe, O., Higashijima, A., Takase, Y. & 1 others, Fukuyama, A., Jan 1 2017, In : Plasma and Fusion Research. 12, 1202020.

Research output: Contribution to journalArticle

injection
magnetic flux
breakdown
gases
3 Citations (Scopus)

Effect of magnetic structure on RF-induced breakdown in QUEST

Yoneda, R., Hanada, K., Nakamura, K., Idei, H., Yoshida, N., Hasegawa, M., Onchi, T., Kuroda, K., Kawasaki, S., Higashijima, A., Nagata, T., Isayama, A., Mitarai, O., Fukuyama, A. & Takase, Y., Jun 1 2017, In : Physics of Plasmas. 24, 6, 062513.

Research output: Contribution to journalArticle

radio frequencies
breakdown
life (durability)
electrons
thresholds
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
7 Citations (Scopus)

Investigation of hydrogen recycling in long-duration discharges and its modification with a hot wall in the spherical tokamak QUEST

Hanada, K., Yoshida, N., Honda, T., Wang, Z., Kuzmin, A., Takagi, I., Hirata, T., Oya, Y., Miyamoto, M., Zushi, H., Hasegawa, M., Nakamura, K., fujisawa, A., Idei, H., Nagashima, Y., Watanabe, O., Onchi, T., Kuroda, K., Long, H., Watanabe, H. & 7 others, Tokunaga, K., Higashijima, A., Kawasaki, S., Nagata, T., Takase, Y., Fukuyama, A. & Mitarai, O., Oct 26 2017, In : Nuclear Fusion. 57, 12, 126061.

Research output: Contribution to journalArticle

recycling
hydrogen
wall temperature
hydrogen fuels
maintenance
3 Citations (Scopus)

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

colorimetry
Colorimetry
Facings
Plasmas
radioactive materials

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 1 2017, In : Fusion Engineering and Design. 123, p. 532-534 3 p.

Research output: Contribution to journalArticle

Plasmas
Orbits
Hamiltonians
MATLAB
Current density
4 Citations (Scopus)

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 1 2017, In : Nuclear Materials and Energy. 12, p. 627-632 6 p.

Research output: Contribution to journalArticle

hydrogen ions
recycling
Spatial distribution
Protons
Recycling
2016
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
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
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
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
1 Citation (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 1 2016, In : IEEE Transactions on Plasma Science. 44, 9, p. 1666-1671 6 p., 7482769.

Research output: Contribution to journalArticle

orbit calculation
electron cyclotron heating
density distribution
current density
electrons
3 Citations (Scopus)

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

Permeation
Hydrogen
Fluxes
probes
hydrogen

Observation of an edge coherent mode and poloidal flow in the electron cyclotron wave induced high βp plasma in QUEST

Banerjee, S., Zushi, H., Nishino, N., Mishra, K., Mahira, Y., Tashima, S., Ejiri, A., Yamaguchi, T., Onchi, T., Nagashima, Y., Hanada, K., Nakamura, K., Idei, H., Hasegawa, M., fujisawa, A., Kuzmin, A. & Matsuoka, K., Aug 1 2016, In : Physics of Plasmas. 23, 8, 082507.

Research output: Contribution to journalArticle

cyclotrons
electrons
magnetohydrodynamic flow
configurations
turbulence
2 Citations (Scopus)

Origin and Evolution of Spontaneous Rotation in Plasma under Different Magnetic Field Geometries in Tokamak QUEST

QUEST Team, Apr 1 2016, In : IEEE Transactions on Plasma Science. 44, 4, p. 441-447 7 p., 7416222.

Research output: Contribution to journalArticle

magnetic field configurations
geometry
magnetic fields
electron cyclotron resonance
plasma currents
9 Citations (Scopus)

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 1 2016, In : Plasma Science and Technology. 18, 11, p. 1069-1075 7 p.

Research output: Contribution to journalArticle

water temperature
configurations
vessels
orbits
cooling
1 Citation (Scopus)

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

plasma layers
Plasmas
configurations
Gases
gases
2015
4 Citations (Scopus)

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

plasma currents
electron cyclotron resonance
heating
electron energy
microwaves
6 Citations (Scopus)

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

Plasmas
Control systems
Data storage equipment
Program processors
Distributed parameter control systems
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
7 Citations (Scopus)

First measurement of electron temperature and density profiles for spherical tokamak plasmas sustained by lower hybridwaves

Togashi, H., Ejiri, A., Homma, H., Shinya, T., Takase, Y., Toida, K., Tsujii, N., Yamaguchi, T., Yoshida, Y., Hasegawa, M., Nagashima, Y., Furui, H., Nakamura, K., Takahashi, W., Takeuchi, T., Sonehara, M., Yajima, S. & Yamazaki, H., Jan 1 2015, In : Plasma and Fusion Research. 10, 1202082.

Research output: Contribution to journalArticle

temperature profiles
electron energy
profiles
tokamak devices
plasma equilibrium
12 Citations (Scopus)

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

Hydrogen
Gases
pulse frequency modulation
Irradiation
Plasmas
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
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
10 Citations (Scopus)

Particle balance in long duration RF driven plasmas on QUEST

Hanada, K., Zushi, H., Yoshida, N., Yugami, N., Honda, T., Hasegawa, M., Mishra, K., Kuzmin, A., Nakamura, K., fujisawa, A., Idei, H., Nagashima, Y., Watanabe, O., Onchi, T., Watanabe, H., Tokunaga, K., Higashijima, A., Kawasaki, S., Nakashima, H., Takase, Y. & 3 others, Fukuyama, A., Mitarai, O. & Peng, Y. K. M., Jul 22 2015, In : Journal of Nuclear Materials. 463, p. 1084-1086 3 p., 48871.

Research output: Contribution to journalArticle

Plasmas
desorption
hydrogen fuels
Thermal desorption
Hydrogen fuels
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
3 Citations (Scopus)

Simultaneous measurement of plasma pressure anisotropy with a double-pass thomson scattering diagnostic system on the TST-2

TST-2 group, Jan 1 2015, In : Plasma and Fusion Research. 10, 2015, p. 1-6 6 p.

Research output: Contribution to journalArticle

plasma pressure
Thomson scattering
plasma currents
anisotropy
tokamak devices
4 Citations (Scopus)

Thomson scattering measurements in low-density plasmas in the TST-2 spherical tokamak

Togashi, H., Ejiri, A., Homma, H., Shinya, T., Takase, Y., Toida, K., Tsujii, N., Yamaguchi, T., Yoshida, Y., Furui, H., Sonehara, M., Nakamura, K., Takahashi, W., Takeuchi, T., Yajima, S., Yamazaki, H., Hasegawa, M., Nagashima, Y. & Tojo, H., Dec 18 2015, In : Journal of Instrumentation. 10, 12, C12020.

Research output: Contribution to journalArticle

Thomson scattering
Plasma density
plasma density
Plasma
Scattering
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
1 Citation (Scopus)

Demonstration of improvement in the signal-to-noise ratio of Thomson scattering signal obtained by using a multi-pass optical cavity on the Tokyo Spherical Tokamak-2

Togashi, H., Ejiri, A., Hiratsuka, J., Nakamura, K., Takase, Y., Yamaguchi, T., Furui, H., Imamura, K., Inada, T., Kakuda, H., Nakanishi, A., Oosako, T., Shinya, T., Sonehara, M., Tsuda, S., Tsujii, N., Wakatsuki, T., Hasegawa, M., Nagashima, Y., Narihara, K. & 2 others, Yamada, I. & Tojo, H., Jan 1 2014, In : Review of Scientific Instruments. 85, 11, 11D486.

Research output: Contribution to journalArticle

Thomson scattering
Signal to noise ratio
signal to noise ratios
Demonstrations
Scattering
11 Citations (Scopus)

Injection and confinement of a laser pulse in an optical cavity for multi-pass Thomson scattering diagnostics in the TST-2 spherical tokamak device

Togashi, H., Ejiri, A., Hasegawa, M., Hiratsuka, J., Nagashima, Y., Nakamura, K., Narihara, K., Takase, Y., Tojo, H., Tsujii, N., Yamada, I. & Yamaguchi, T., Feb 14 2014, In : Plasma and Fusion Research. 9, 2014, 1202005.

Research output: Contribution to journalArticle

tokamak devices
Thomson scattering
injection
cavities
pulses
5 Citations (Scopus)

Note: Multi-pass Thomson scattering measurement on the TST-2 spherical tokamak

Togashi, H., Ejiri, A., Hiratsuka, J., Nakamura, K., Takase, Y., Yamaguchi, T., Furui, H., Imamura, K., Inada, T., Kakuda, H., Nakanishi, A., Oosako, T., Shinya, T., Sonehara, M., Tsuda, S., Tsujii, N., Wakatsuki, T., Hasegawa, M., Nagashima, Y., Narihara, K. & 2 others, Yamada, I. & Tojo, H., Jan 1 2014, In : Review of Scientific Instruments. 85, 5, 056103.

Research output: Contribution to journalArticle

Thomson scattering
Laser pulses
Scattering
Plasmas
Lasers
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
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., Jan 1 2014, In : Physics of Plasmas. 21, 7, 072311.

Research output: Contribution to journalArticle

turbulence
probability density functions
vessels
gradients
kurtosis
5 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

plasma pressure
plasma currents
high energy electrons
decomposition
anisotropy
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., Jan 1 2014, In : Review of Scientific Instruments. 85, 11, 11E808.

Research output: Contribution to journalArticle

Antenna phased arrays
Infrared imaging
phased arrays
Electron emission
antennas
1 Citation (Scopus)

Two-Fluid Equilibrium Considerations of Te/Ti » 1, Collisionless ST Plasmas Sustained by RF Electron Heating

Peng, Y. K. M., Ishida, A., Takase, Y., Ejiri, A., Tsujii, N., Maekawa, T., Uchida, M., Zushi, H., Hanada, K. & Hasegawa, M., Jan 1 2014, In : Plasma and Fusion Research. 9, SpecialIssue2, 3403146.

Research output: Contribution to journalArticle

collisionless plasmas
heating
fluids
electrons
functionals
2013
2 Citations (Scopus)

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

Research output: Contribution to journalArticle

flux (rate)
radial velocity
filaments
Magnetic fields
Fluxes
4 Citations (Scopus)

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

Plasmas
Control systems
Magnetic flux
Field programmable gate arrays (FPGA)
Derivatives
4 Citations (Scopus)

Electron temperature measurement on QUEST spherical tokamak by thomson scattering system

Yamaguchi, T., Ejiri, A., Hiratsuka, J., Hasegawa, M., Nagashima, Y., Narihara, K., Takase, Y. & Zushi, H., Jun 24 2013, In : Plasma and Fusion Research. 8, 2013, 1302001.

Research output: Contribution to journalArticle

Thomson scattering
temperature measurement
electron energy
temperature profiles
YAG lasers