TY - JOUR
T1 - Effects of high heat flux hydrogen and helium mixture beam irradiation on surface modification and hydrogen retention in tungsten materials
AU - Tokunaga, K.
AU - Fujiwara, T.
AU - Ezato, K.
AU - Suzuki, S.
AU - Akiba, M.
AU - Kurishita, H.
AU - Nagata, S.
AU - Tsuchiya, B.
AU - Tonegawa, A.
AU - Yoshida, N.
PY - 2009/6/15
Y1 - 2009/6/15
N2 - High heat flux experiments using a hydrogen-helium mixture beam have been carried out on powder metallurgy tungsten (PM-W) and ultra fine grain W-TiC alloy (W-0.5 wt%TiC-H2). The energy of is 18 keV. Beam flux and heat flux at the beam center is 2.0 × 1021 atoms/m2s and 7.0 MW/m2, respectively. Typical ratio of He/D ion is 0.25. Beam duration is 1.5-3 s and interval of beam shot start is 30 s. The samples are irradiated up to a fluence of 1022-1024 He/m2 by the repeated irradiation pulses. After the irradiation, surface modification by the irradiation and hydrogen retention, surface composition have been investigated. Surface modification by hydrogen-helium mixture beams is completely different from results of single beam irradiation. In particular, mixture beam irradiation causes remarkably high hydrogen retention.
AB - High heat flux experiments using a hydrogen-helium mixture beam have been carried out on powder metallurgy tungsten (PM-W) and ultra fine grain W-TiC alloy (W-0.5 wt%TiC-H2). The energy of is 18 keV. Beam flux and heat flux at the beam center is 2.0 × 1021 atoms/m2s and 7.0 MW/m2, respectively. Typical ratio of He/D ion is 0.25. Beam duration is 1.5-3 s and interval of beam shot start is 30 s. The samples are irradiated up to a fluence of 1022-1024 He/m2 by the repeated irradiation pulses. After the irradiation, surface modification by the irradiation and hydrogen retention, surface composition have been investigated. Surface modification by hydrogen-helium mixture beams is completely different from results of single beam irradiation. In particular, mixture beam irradiation causes remarkably high hydrogen retention.
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U2 - 10.1016/j.jnucmat.2009.01.235
DO - 10.1016/j.jnucmat.2009.01.235
M3 - Article
AN - SCOPUS:67349278876
SN - 0022-3115
VL - 390-391
SP - 916
EP - 920
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1
ER -