Synergistic effects of high heat loading and helium irradiation of tungsten

Kazutoshi Tokunaga, S. Tamura, N. Yoshida, K. Ezato, M. Taniguchi, K. Sato, S. Suzuki, M. Akiba

Research output: Contribution to journalConference article

51 Citations (Scopus)

Abstract

High heat flux experiments using a helium beam have been carried out on powder metallurgy tungsten. The energy of He is 19 keV. He beam flux and heat flux at the beam center is 2.0×1021 He/m2s and 6.0 MW/m2, respectively. Beam duration is 3.0-3.9 s and interval of beam shot start is 30 s. The samples are irradiated up to a fluence of 10 22-1024 He/m2 by the repeated irradiation pulses. In addition to the He beam irradiation, high heat flux experiments using hydrogen and electron beams have also been carried out on the samples. After the irradiation, surface modification by the irradiation has been investigated. Surface modification by helium and hydrogen beams is completely different from results of electron beam heating. In particular, helium beam heating causes remarkably surface modification such as a fine-scale rough surface at a peak temperature above 2400 °C.

Original languageEnglish
Pages (from-to)757-760
Number of pages4
JournalJournal of Nuclear Materials
Volume329-333
Issue number1-3 PART A
DOIs
Publication statusPublished - Aug 1 2004
EventProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
Duration: Dec 7 2003Dec 12 2003

Fingerprint

Helium
Tungsten
tungsten
helium
Irradiation
Surface treatment
Heat flux
heat
irradiation
Tungsten powder metallurgy
Hydrogen
Electron beams
Heating
heat flux
Experiments
Fluxes
electron beams
Hot Temperature
heating
powder metallurgy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Tokunaga, K., Tamura, S., Yoshida, N., Ezato, K., Taniguchi, M., Sato, K., ... Akiba, M. (2004). Synergistic effects of high heat loading and helium irradiation of tungsten. Journal of Nuclear Materials, 329-333(1-3 PART A), 757-760. https://doi.org/10.1016/j.jnucmat.2004.04.178

Synergistic effects of high heat loading and helium irradiation of tungsten. / Tokunaga, Kazutoshi; Tamura, S.; Yoshida, N.; Ezato, K.; Taniguchi, M.; Sato, K.; Suzuki, S.; Akiba, M.

In: Journal of Nuclear Materials, Vol. 329-333, No. 1-3 PART A, 01.08.2004, p. 757-760.

Research output: Contribution to journalConference article

Tokunaga, K, Tamura, S, Yoshida, N, Ezato, K, Taniguchi, M, Sato, K, Suzuki, S & Akiba, M 2004, 'Synergistic effects of high heat loading and helium irradiation of tungsten', Journal of Nuclear Materials, vol. 329-333, no. 1-3 PART A, pp. 757-760. https://doi.org/10.1016/j.jnucmat.2004.04.178
Tokunaga, Kazutoshi ; Tamura, S. ; Yoshida, N. ; Ezato, K. ; Taniguchi, M. ; Sato, K. ; Suzuki, S. ; Akiba, M. / Synergistic effects of high heat loading and helium irradiation of tungsten. In: Journal of Nuclear Materials. 2004 ; Vol. 329-333, No. 1-3 PART A. pp. 757-760.
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