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

doi:10.1016/j.jnucmat.2004.04.178

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Conference article › peer-review

52 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 language	English
Pages (from-to)	757-760
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	329-333
Issue number	1-3 PART A
DOIs	https://doi.org/10.1016/j.jnucmat.2004.04.178
Publication status	Published - Aug 1 2004
Event	Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: Dec 7 2003 → Dec 12 2003

All Science Journal Classification (ASJC) codes

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

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title = "Synergistic effects of high heat loading and helium irradiation of tungsten",

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.",

author = "Kazutoshi Tokunaga and S. Tamura and N. Yoshida and K. Ezato and M. Taniguchi and K. Sato and S. Suzuki and M. Akiba",

year = "2004",

month = aug,

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doi = "10.1016/j.jnucmat.2004.04.178",

language = "English",

volume = "329-333",

pages = "757--760",

journal = "Journal of Nuclear Materials",

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note = "Proceedings of the 11th Conference on Fusion Research ; Conference date: 07-12-2003 Through 12-12-2003",

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TY - JOUR

T1 - Synergistic effects of high heat loading and helium irradiation of tungsten

AU - Tokunaga, Kazutoshi

AU - Tamura, S.

AU - Yoshida, N.

AU - Ezato, K.

AU - Taniguchi, M.

AU - Sato, K.

AU - Suzuki, S.

AU - Akiba, M.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - 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.

AB - 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.

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EP - 760

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-3 PART A

T2 - Proceedings of the 11th Conference on Fusion Research

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