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Research Output 1988 2019

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Conference article
2015
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
2011
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
2009
6 Citations (Scopus)

Surface modification of tungsten mirrors due to low-energy helium plasma irradiation in the compact PWI simulator APSEDAS

Sakamoto, M., Miyazaki, T., Higashizono, Y., Ogawa, K., Ozaki, K., Ashikawa, N., Tokitani, M., Shoji, T., Masuzaki, S., Tokunaga, K., Ohya, K., Sagara, A., Yoshida, N. & Sato, K. N., Dec 1 2009, In : Physica Scripta T. T138, 14043.

Research output: Contribution to journalConference article

Surface Modification
helium plasma
Reflectivity
Irradiation
simulators
2006
27 Citations (Scopus)

Behavior of actively cooled mock-ups with plasma sprayed tungsten coating under high heat flux conditions

Tokunaga, K., Kubota, Y., Noda, N., Imamura, Y., Kurumada, A., Yoshida, N., Sogabe, T., Kato, T. & Schedler, B., Feb 1 2006, In : Fusion Engineering and Design. 81 A, 1-4, p. 133-138 6 p.

Research output: Contribution to journalConference article

Mockups
Tungsten
Plasma spraying
Heat flux
Plasmas
5 Citations (Scopus)

Effect of low energy helium irradiation on mechanical properties of 304 stainless steel

Kawakami, T., Tokunaga, K. & Yoshida, N., Feb 1 2006, In : Fusion Engineering and Design. 81 A, 1-4, p. 335-340 6 p.

Research output: Contribution to journalConference article

Helium
Stainless Steel
Stainless steel
Irradiation
Mechanical properties
2004
20 Citations (Scopus)

Desorption of helium from austenitic stainless steel heavily bombarded by low energy He ions

Tokitani, M., Miyamoto, M., Tokunaga, K., Iwakiri, H., Fujiwara, T. & Yoshida, N., Aug 1 2004, In : Journal of Nuclear Materials. 329-333, 1-3 PART A, p. 761-765 5 p.

Research output: Contribution to journalConference article

Helium
austenitic stainless steels
Austenitic stainless steel
Desorption
desorption
33 Citations (Scopus)

High heat flux properties of pure tungsten and plasma sprayed tungsten coatings

Liu, X., Tamura, S., Tokunaga, K., Yoshida, N., Noda, N., Yang, L. & Xu, Z., Aug 1 2004, In : Journal of Nuclear Materials. 329-333, 1-3 PART A, p. 687-691 5 p.

Research output: Contribution to journalConference article

Tungsten
Heat flux
heat flux
tungsten
Plasmas
22 Citations (Scopus)

High-temperature properties of joint interface of VPS-tungsten coated CFC

Tamura, S., Liu, X., Tokunaga, K., Tsunekawa, Y., Okumiya, M., Noda, N. & Yoshida, N., Aug 1 2004, In : Journal of Nuclear Materials. 329-333, 1-3 PART A, p. 711-716 6 p.

Research output: Contribution to journalConference article

High temperature properties
Tungsten
fiber composites
carbon fibers
Carbon fibers
13 Citations (Scopus)

Microscopic damage of materials exposed to glow discharge cleanings in LHD

Miyamoto, M., Tokitani, M., Tokunaga, K., Fujiwara, T., Yoshida, N., Masuzaki, S. & Komori, A., Aug 1 2004, In : Journal of Nuclear Materials. 329-333, 1-3 PART A, p. 742-746 5 p.

Research output: Contribution to journalConference article

Helium
Glow discharges
glow discharges
cleaning
Cleaning
51 Citations (Scopus)

Synergistic effects of high heat loading and helium irradiation of tungsten

Tokunaga, K., Tamura, S., Yoshida, N., Ezato, K., Taniguchi, M., Sato, K., Suzuki, S. & Akiba, M., Aug 1 2004, In : Journal of Nuclear Materials. 329-333, 1-3 PART A, p. 757-760 4 p.

Research output: Contribution to journalConference article

Helium
Tungsten
tungsten
helium
Irradiation
2003
10 Citations (Scopus)

Damage process of resolidified part on CVD-W coated molybdenum under high heat load

Tamura, S., Tokunaga, K. & Yoshida, N., Mar 1 2003, In : Journal of Nuclear Materials. 313-316, SUPPL., p. 250-254 5 p.

Research output: Contribution to journalConference article

Molybdenum
Thermal load
molybdenum
Chemical vapor deposition
vapor deposition
5 Citations (Scopus)

Hydrogen accumulation in the helium implanted surface of Mo single crystals

Nagata, S., Tokunaga, K., Tsuchiya, B., Ohtsu, N., Sugawara, T. & Shikama, T., Aug 11 2003, In : Journal of Alloys and Compounds. 356-357, p. 326-329 4 p.

Research output: Contribution to journalConference article

Helium
Hydrogen
Single crystals
Deuterium
Contamination
7 Citations (Scopus)

Hydrogen and deuterium uptake in helium implanted layer of Mo and W

Nagata, S., Tsuchiya, B., Ohtsu, N., Sugawara, T., Shikama, T., Tokunaga, K., Takenaka, M. & Kuramoto, E., Mar 1 2003, In : Journal of Nuclear Materials. 313-316, SUPPL., p. 279-283 5 p.

Research output: Contribution to journalConference article

Helium
Deuterium
deuterium
Hydrogen
helium
8 Citations (Scopus)

Investigation of the trapped helium and hydrogen ions in plasma facing materials for LHD using thermal desorption spectrometer and alternating glow discharge cleanings

Kubota, Y., Noda, N., Sagara, A., Suzuki, H., Masuzaki, S., Tokunaga, K., Satow, T., Yamazaki, K. & Motojima, O., Mar 1 2003, In : Journal of Nuclear Materials. 313-316, SUPPL., p. 239-244 6 p.

Research output: Contribution to journalConference article

Helium
Thermal desorption
helium ions
Glow discharges
hydrogen ions
8 Citations (Scopus)

Material properties of co-deposition formed on plasma facing materials in all-metal machine TRIAM-1M

Miyamoto, M., Tokunaga, K., Fujiwara, T., Yoshida, N., Morimoto, Y., Sugiyama, T. & Okuno, K., Mar 1 2003, In : Journal of Nuclear Materials. 313-316, SUPPL., p. 82-86 5 p.

Research output: Contribution to journalConference article

Materials properties
Metals
Plasmas
metals
Hydrogen
32 Citations (Scopus)

Surface morphology and helium retention on tungsten exposed to low energy and high flux helium plasma

Tokunaga, K., Doerner, R. P., Seraydarian, R., Noda, N., Kubota, Y., Yoshida, N., Sogabe, T., Kato, T. & Schedler, B., Mar 1 2003, In : Journal of Nuclear Materials. 313-316, SUPPL., p. 92-96 5 p.

Research output: Contribution to journalConference article

helium plasma
Helium
Tungsten
Surface morphology
tungsten
2000
17 Citations (Scopus)

High heat flux test of actively cooled tungsten-coated carbon divertor mock-ups

Tokunaga, K., Yoshida, N., Kubota, Y., Noda, N., Imamura, Y., Oku, T., Kurumada, A., Sogabe, T., Kato, T. & Plöchl, L., Jan 1 2000, In : Fusion Engineering and Design. 49-50, p. 371-376 6 p.

Research output: Contribution to journalConference article

Mockups
Tungsten
Brazing
Heat flux
Carbon
1999
38 Citations (Scopus)

Behavior of plasma-sprayed tungsten coatings on CFC and graphite under high heat load

Tokunaga, K., Yoshida, N., Noda, N., Kubota, Y., Shigeru, I., Sakamoto, R., Sogabe, T. & Plöchl, L., Mar 2 1999, In : Journal of Nuclear Materials. 266, p. 1224-1229 6 p.

Research output: Contribution to journalConference article

Tungsten
Graphite
fiber composites
Thermal load
carbon fibers