Micro/nano scale modification of plasma facing components in LHD and its impact on the metal dust generations

M. Tokitani, Y. Ohtawa, N. Yoshida, Kazutoshi Tokunaga, T. Fujiwara, N. Ashikawa, S. Masuzaki, H. Yamada, A. Sagara, N. Noda, A. Komori, experimental group LHD experimental group

研究成果: ジャーナルへの寄稿記事

8 引用 (Scopus)

抄録

First walls and divertor plates of large helical device (LHD) are made of stainless steels and isotropic graphite, respectively. They are bombarded by energetic plasma particles, and are caused the radiation damages. For understanding of long term irradiation effects of metallic first walls, probe specimens of Mo were mounted on the special sample stage of outer-port of the LHD torus which is located at about 2500 mm from LCFS (last closed flux surface) of heliotron plasma, and then, exposed to plasma discharges through the single experimental campaign. Majority of discharge gas was hydrogen or helium. Amorphous re-deposition layer of about few nm thick and large sized blisters with few micrometer were formed at the specimen surface. Formation of dense gas bubbles (1-2 nm), dislocation loops and surface roughening were simultaneously occurred in the sub-surface layer about 30 nm thick. Such nano scale damages may be mainly caused by helium particle bombardment.

元の言語英語
ページ(範囲)156-159
ページ数4
ジャーナルJournal of Nuclear Materials
390-391
発行部数1
DOI
出版物ステータス出版済み - 6 15 2009

Fingerprint

Dust
dust
Metals
Plasmas
Helium
helium
metals
blisters
Gases
gas discharges
radiation damage
plasma jets
Graphite
bombardment
micrometers
stainless steels
Stainless Steel
surface layers
Radiation damage
bubbles

All Science Journal Classification (ASJC) codes

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

これを引用

Tokitani, M., Ohtawa, Y., Yoshida, N., Tokunaga, K., Fujiwara, T., Ashikawa, N., ... LHD experimental group, E. G. (2009). Micro/nano scale modification of plasma facing components in LHD and its impact on the metal dust generations. Journal of Nuclear Materials, 390-391(1), 156-159. https://doi.org/10.1016/j.jnucmat.2009.01.156

Micro/nano scale modification of plasma facing components in LHD and its impact on the metal dust generations. / Tokitani, M.; Ohtawa, Y.; Yoshida, N.; Tokunaga, Kazutoshi; Fujiwara, T.; Ashikawa, N.; Masuzaki, S.; Yamada, H.; Sagara, A.; Noda, N.; Komori, A.; LHD experimental group, experimental group.

:: Journal of Nuclear Materials, 巻 390-391, 番号 1, 15.06.2009, p. 156-159.

研究成果: ジャーナルへの寄稿記事

Tokitani, M, Ohtawa, Y, Yoshida, N, Tokunaga, K, Fujiwara, T, Ashikawa, N, Masuzaki, S, Yamada, H, Sagara, A, Noda, N, Komori, A & LHD experimental group, EG 2009, 'Micro/nano scale modification of plasma facing components in LHD and its impact on the metal dust generations', Journal of Nuclear Materials, 巻. 390-391, 番号 1, pp. 156-159. https://doi.org/10.1016/j.jnucmat.2009.01.156
Tokitani, M. ; Ohtawa, Y. ; Yoshida, N. ; Tokunaga, Kazutoshi ; Fujiwara, T. ; Ashikawa, N. ; Masuzaki, S. ; Yamada, H. ; Sagara, A. ; Noda, N. ; Komori, A. ; LHD experimental group, experimental group. / Micro/nano scale modification of plasma facing components in LHD and its impact on the metal dust generations. :: Journal of Nuclear Materials. 2009 ; 巻 390-391, 番号 1. pp. 156-159.
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AU - Ashikawa, N.

AU - Masuzaki, S.

AU - Yamada, H.

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