If you made any changes in Pure these will be visible here soon.

Research Output 1988 2019

2019

A 6 MW/m2 High Heat Flux Testing Facility of Irradiated Materials Using Infrared Plasma-Arc Lamps

Sabau, A. S., Tokunaga, K., Littleton, M. G., Kiggans, J. O., Schaich, C. R., Dinwiddie, R. B., Moore, D. T., Ueda, Y. & Katoh, Y., Oct 3 2019, In : Fusion Science and Technology. 75, 7, p. 690-701 12 p.

Research output: Contribution to journalArticle

Arc lamps
arc lamps
plasma jets
Heat flux
heat flux

Combined effect of laser thermal shock and helium ion irradiation on W-Y 2 O 3 composites

Zhang, Y. X., Tan, X. Y., Luo, L. M., Xu, Y., Zan, X., Xu, Q., Tokunaga, K., Zhu, X. Y. & Wu, Y. C., Mar 1 2019, In : Fusion Engineering and Design. 140, p. 102-106 5 p.

Research output: Contribution to journalArticle

Helium
Thermal shock
Ion bombardment
Tungsten
Lasers

Densification and microstructure evolution of W-TiC-Y2O3 during spark plasma sintering

Zhou, Y. F., Zhao, Z. Y., Tan, X. Y., Luo, L. M., Xu, Y., Zan, X., Xu, Q., Tokunaga, K., Zhu, X. Y. & Wu, Y. C., Feb 1 2019, In : International Journal of Refractory Metals and Hard Materials. 79, p. 95-101 7 p.

Research output: Contribution to journalArticle

Spark plasma sintering
Densification
Microstructure
Tungsten
Sintering

Effect of annealing on the microstructure behavior of D+-irradiated W-2vol.%TiC composite prepared by wet-chemical method

Zhang, Y. X., Tan, X. Y., Zan, X., Luo, L. M., Xu, Y., Xu, Q., Tokunaga, K., Zhu, X. Y. & Wu, Y. C., Nov 1 2019, In : Fusion Engineering and Design. 148, 111321.

Research output: Contribution to journalArticle

Annealing
Microstructure
Hot rolling
Composite materials
Ion bombardment
2018
3 Citations (Scopus)

Effect of heating temperature on tritium retention in stainless steel type 316 L

Matsuyama, M., Zushi, H., Tokunaga, K., Kuzmin, A. & Hanada, K., Aug 1 2018, In : Nuclear Materials and Energy. 16, p. 52-59 8 p.

Research output: Contribution to journalArticle

Tritium
Stainless Steel
tritium
stainless steels
Stainless steel
2 Citations (Scopus)

Effect of laser beam thermal shock on the helium ion irradiation damage behavior of W-TiC-Y2O3 composites

Xu, MY. Y., Luo, LM. M., Xu, Y., Zan, X., Xu, Q., Tokunaga, K., Zhu, XY. Y. & Wu, YC. C., Oct 1 2018, In : Journal of Nuclear Materials. 509, p. 198-203 6 p.

Research output: Contribution to journalArticle

Helium
thermal shock
helium ions
Thermal shock
Ion bombardment

Fatigue pre-cracking and fracture toughness in polycrystalline tungsten and molybdenum

Taguchi, K., Nakadate, K., Matsuo, S., Tokunaga, K. & Kurishita, H., Jan 1 2018, In : Journal of Nuclear Materials. 498, p. 445-457 13 p.

Research output: Contribution to journalArticle

Tungsten
Molybdenum
toughness
fracture strength
molybdenum

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
1 Citation (Scopus)

Helium irradiation behavior of tungsten-niobium alloys under different ion energies

Xu, M. Y., Luo, L. M., Zhou, Y. F., Zan, X., Xu, Y., Xu, Q., Tokunaga, K., Zhu, X. Y. & Wu, Y. C., Jul 1 2018, In : Fusion Engineering and Design. 132, p. 7-12 6 p.

Research output: Contribution to journalArticle

Niobium alloys
Tungsten alloys
Helium
Irradiation
Ions
1 Citation (Scopus)

Microstructure and transient laser thermal shock behavior of W–TiC–Y2O3 composites prepared by wet chemical method

Xu, MY. Y., Luo, LM. M., Lin, JS. S., Xu, Y., Zan, X., Xu, Q., Tokunaga, K., Zhu, XY. Y. & Wu, YC. C., Oct 25 2018, In : Journal of Alloys and Compounds. 766, p. 784-790 7 p.

Research output: Contribution to journalArticle

Thermal shock
Microstructure
Lasers
Composite materials
Facings
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)

Surface morphology of Tungsten-F82H after high-heat flux testing using plasma-arc lamps

Ibano, K., Sabau, A. S., Tokunaga, K., Akiyoshi, M., Kiggans, J. O., Schaich, C. R., Katoh, Y. & Ueda, Y., Aug 1 2018, In : Nuclear Materials and Energy. 16, p. 128-132 5 p.

Research output: Contribution to journalArticle

Arc lamps
arc lamps
Tungsten
plasma jets
Surface morphology
1 Citation (Scopus)

Thermal shock behavior of W–ZrC/Sc2O3 composites under two different transient events by electron and laser irradiation

Chen, H. Y., Luo, L. M., Zan, X., Xu, Q., Tokunaga, K., Liu, J. Q., Zhu, X. Y., Cheng, J. G. & Wu, Y. C., Feb 1 2018, In : Journal of Nuclear Materials. 499, p. 248-255 8 p.

Research output: Contribution to journalArticle

thermal shock
Electron irradiation
Thermal shock
Laser beam effects
electron irradiation
1 Citation (Scopus)

Transient thermal shock behavior of W–Zr/Sc2O3 composites prepared via spark plasma sintering

Chen, H. Y., Luo, L. M., Zan, X., Xu, Q., Tokunaga, K., Liu, J. Q., Liu, D. G., Zhu, X. Y., Cheng, J. G. & Wu, Y. C., Jan 1 2018, In : Fusion Engineering and Design. 126, p. 44-50 7 p.

Research output: Contribution to journalArticle

Spark plasma sintering
Thermal shock
Surface treatment
Composite materials
Thermal fatigue
2017

Ablation-erosion analyses of various fusion material surfaces and developments of surface erosion monitors for notification of fusion chamber maintenance times, as an example: Visible light transparent SiC and up-conversion phosphors applied to plasma facing surface structures, useful for versatile purposes to protect and diagnose fusion chambers and so on

Kasuya, K., Motokoshi, S., Taniguchi, S., Nakai, M., Tokunaga, K., Kolacek, K., Schmidt, J., Frolov, O., Straus, J., Matejicek, J. & Choukourov, A., Jan 1 2017, XXI International Symposium on High Power Laser Systems and Applications 2016. Brunnbauer, J., Schuocker, D. & Majer, R. (eds.). SPIE, Vol. 10254. 102541B

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

Upconversion
Phosphor
Ablation
Erosion
Surface structure
3 Citations (Scopus)

Effects of ion irradiation on H2O and CO2 absorption and desorption characteristics of Li2ZrO3 and Pt-coated Li2ZrO3

Tsuchiya, B., Nagata, S., Sugiyama, T. & Tokunaga, K., Sep 14 2017, In : International Journal of Hydrogen Energy. 42, 37, p. 23746-23750 5 p.

Research output: Contribution to journalArticle

Ion bombardment
ion irradiation
Platinum
Desorption
platinum
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

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
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
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

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

Orbits
Current density
current density
orbits
Plasmas
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
8 Citations (Scopus)

Effect of second-phase particles on the properties of W-based materials under high-heat loading

Tan, XY. Y., Li, P., Luo, LM. M., Xu, Q., Tokunaga, K., Zan, X. & Wu, YC. C., Dec 1 2016, In : Nuclear Materials and Energy. 9, p. 399-404 6 p.

Research output: Contribution to journalArticle

plastic deformation
Plastic deformation
heat
crack initiation
crack propagation
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 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
7 Citations (Scopus)

Properties of Lu2O3 doped tungsten and thermal shock performance

Wang, S., Zhang, J., Luo, L. M., Zan, X., Xu, Q., Zhu, X. Y., Tokunaga, K. & Wu, Y. C., Nov 1 2016, In : Powder Technology. 301, p. 65-69 5 p.

Research output: Contribution to journalArticle

Tungsten
Thermal shock
Microhardness
Tungsten alloys
Deuterium
2015
1 Citation (Scopus)

Determination of hydrogen diffusion coefficients in F82H by hydrogen depth profiling with a tritium imaging plate technique

Higaki, M., Otsuka, T., Tokunaga, K., Hashizume, K., Ezato, K., Suzuki, S., Enoeda, M. & Akiba, M., Mar 1 2015, In : Fusion Science and Technology. 67, 2, p. 379-381 3 p.

Research output: Contribution to journalArticle

Depth profiling
Tritium
tritium
Hydrogen
diffusion coefficient
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
1 Citation (Scopus)

Laser erosion diagnostics of plasma facing materials with displacement sensors and their application to safeguard monitors to protect nuclear fusion chambers

Kasuya, K., Motokoshi, S., Taniguchi, S., Nakai, M., Tokunaga, K., Mroz, W., Budner, B. & Korczyc, B., Jan 1 2015, XX International Symposium on High-Power Laser Systems and Applications 2014. Tang, X., Chen, S. & Tang, C. (eds.). SPIE, 925548. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 9255).

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

Erosion
nuclear fusion
erosion
monitors
Diagnostics
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
3 Citations (Scopus)

The effect of platinum-coatings on hydrogen- and water-absorption and desorption characteristics of lithium zirconate

Tsuchiya, B., Bandow, S., Nagata, S., Saito, K., Tokunaga, K. & Morita, K., Jan 1 2015, In : Physics Procedia. 66, p. 287-291 5 p.

Research output: Contribution to journalConference article

platinum
lithium
desorption
coatings
hydrogen
2014
3 Citations (Scopus)

Current activities in the interactive joint research at tohoku university - advanced evaluation of radiation effects on fusion materials

Kurishita, H., Hatakeyama, M., Narui, M., Matsuo, S., Shikama, T., Tada, K., Ohno, N., Takeuchi, T., Hatano, Y., Nishiura, M., Nakashima, Y., Watanabe, H., Tokunaga, K., Hino, T., Ueda, Y., Muroga, T., Sagara, A. & Kaneko, O., Jan 1 2014, In : Plasma and Fusion Research. 9, SpecialIssue2, 3405136.

Research output: Contribution to journalArticle

radiation effects
fusion
evaluation
desorption
neutron irradiation
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
6 Citations (Scopus)

Effect of grain orientation and heat treatment on mechanical properties of pure W

Noto, H., Taniguchi, S., Kurishita, H., Matsuo, S., Ukita, T., Tokunaga, K. & Kimura, A., Jan 1 2014, In : Journal of Nuclear Materials. 455, 1-3, p. 475-479 5 p.

Research output: Contribution to journalArticle

heat treatment
fracture strength
Heat treatment
mechanical properties
Mechanical properties
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
2013
60 Citations (Scopus)

Development of nanostructured tungsten based materials resistant to recrystallization and/or radiation induced embrittlement

Kurishita, H., Arakawa, H., Matsuo, S., Sakamoto, T., Kobayashi, S., Nakai, K., Pintsuk, G., Linke, J., Tsurekawa, S., Yardley, V., Tokunaga, K., Takida, T., Katoh, M., Ikegaya, A., Ueda, Y., Kawai, M. & Yoshida, N., Apr 8 2013, In : Materials Transactions. 54, 4, p. 456-465 10 p.

Research output: Contribution to journalReview article

Tungsten
embrittlement
Embrittlement
tungsten
Grain boundaries
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
24 Citations (Scopus)

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

Kaneko, O., Yamada, H., Shigeru, I., 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
9 Citations (Scopus)

High heat loading properties of vacuum plasma spray tungsten coatings on reduced activation ferritic/martensitic steel

Tokunaga, K., Hotta, T., Araki, K., Miyamoto, Y., Fujiwara, T., Hasegawa, M., Nakamura, K., Ezato, K., Suzuki, S., Enoeda, M., Akiba, M., Nagasaka, T., Kasada, R. & Kimura, A., Jan 1 2013, In : Journal of Nuclear Materials. 438, SUPPL

Research output: Contribution to journalArticle

Martensitic steel
Tungsten
plasma spraying
Plasma spraying
Ferritic steel
16 Citations (Scopus)

High heat load properties of nanostructured, recrystallized W-1.1TiC

Tokunaga, K., Kurishita, H., Arakawa, H., Matsuo, S., Hotta, T., Araki, K., Miyamoto, Y., Fujiwara, T., Nakamura, K., Takida, T., Kato, M. & Ikegaya, A., Jun 17 2013, In : Journal of Nuclear Materials. 442, 1-3 SUPPL.1, p. S297-S301

Research output: Contribution to journalArticle

Thermal load
Irradiation
heat
irradiation
grade
2 Citations (Scopus)

H loop shaping control for plasma vertical position instability on QUEST

Liu, X., Nakamura, K., Nakamura, K., Mitarai, O., Hasegawa, M., Tokunaga, K., Xue, E., Zushi, H., Hanada, K., fujisawa, A., Idei, H., Kawasaki, S., Nakashima, H., Higashijima, A. & Araki, K., Jan 1 2013, In : Plasma Science and Technology. 15, 3, p. 295-299 5 p.

Research output: Contribution to journalArticle

controllers
vessels
toroidal plasmas
vacuum chambers
coils

Material behavior on heat loading and hydrogen penetration of vacuum plasma spray tungsten coatings on reduced activation ferritic/martensitic steel

Tokunaga, K., Hotta, T., Otsuka, T., Kobayashi, A., Araki, K., Miyamoto, Y., Fujiwara, T., Hasegawa, M., Nakamura, K., Ezato, K., Suzuki, S., Enoeda, M., Akiba, M., Nagasaka, T., Kasada, R. & Kimura, A., Dec 25 2013, In : Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society. 31, 4, p. 183s-187s

Research output: Contribution to journalArticle

Martensitic steel
Tungsten
Plasma spraying
Ferritic steel
Hydrogen
1 Citation (Scopus)

Properties of deposited layer formed by interaction with Be seeded D-He mixture plasma and tungsten

Tokunaga, K., Baldwin, M. J., Nishijima, D., Doerner, R. P., Nagata, S., Tsuchiya, B., Kurishita, H., Fujiwara, T., Araki, K., Miyamoto, Y., Ohno, N. & Ueda, Y., Jun 17 2013, In : Journal of Nuclear Materials. 442, 1-3 SUPPL.1, p. s313-s319

Research output: Contribution to journalArticle

Tungsten
Beam plasma interactions
tungsten
Plasmas
Nanostructures
9 Citations (Scopus)

Retention and release mechanisms of tritium loaded in plasma-sprayed tungsten coatings by plasma exposure

Otsuka, T., Tanabe, T. & Tokunaga, K., Jan 1 2013, In : Journal of Nuclear Materials. 438, SUPPL

Research output: Contribution to journalArticle

Tungsten
Tritium
tritium
tungsten
Plasmas
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
2012
16 Citations (Scopus)

Analysis of PWI footprint traces and material damage on the first walls of the spherical tokamak QUEST

Sharma, S. K., Zushi, H., Yoshida, N., Watanabe, H., Osakabe, M., Takeri, Y., Hasegawa, M., Tanabe, T., Tokunaga, K., Hanada, K., Idei, H., Sakamoto, M., Nakamura, K., fujisawa, A., Ishiguro, M. & Tashima, S., Jan 1 2012, In : Fusion Engineering and Design. 87, 1, p. 77-86 10 p.

Research output: Contribution to journalArticle

Beam plasma interactions
Plasmas
Melting
Tungsten
Electron cyclotron resonance
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
9 Citations (Scopus)

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

radio frequencies
plasma currents
plasma density
heating
antennas
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
2011
2 Citations (Scopus)

Application of tritium tracer techniques to observation of hydrogen on surface and in bulk of F82H

Otsuka, T., Tanabe, T., Tokunaga, K., Yoshida, N., Ezato, K., Suzuki, S. & Akiba, M., Oct 1 2011, In : Journal of Nuclear Materials. 417, 1-3, p. 1135-1138 4 p.

Research output: Contribution to journalArticle

Radioactive tracers
Tritium
tritium
tracers
Hydrogen
7 Citations (Scopus)

Behaviour of tritium in plasma-sprayed tungsten coating on steel exposed to tritium plasma

Otsuka, T., Tanabe, T. & Tokunaga, K., Dec 1 2011, In : Physica Scripta T. T145, 014035.

Research output: Contribution to journalConference article

tritium
Coating
Steel
tungsten
Plasma