Properties of deposited layer formed by interaction with Be seeded D-He mixture plasma and tungsten

Kazutoshi Tokunaga, M. J. Baldwin, D. Nishijima, R. P. Doerner, S. Nagata, B. Tsuchiya, H. Kurishita, T. Fujiwara, K. Araki, Y. Miyamoto, N. Ohno, Y. Ueda

Research output: Contribution to journalArticle

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Abstract

Be-seeded, high-flux, deuterium/helium mixture plasma exposure experiments on tungsten target materials have been performed to simulate ITER all tungsten divertor erosion/modification and deposition phenomena. The exposure conditions are kept fixed at a typical low-ion-energy of 60 eV and a flux of 3-6 × 10 22 /m 2 /s. Sample temperature is 1123 K and plasma exposure times spanning 1050-10,100 s are explored. The typical ratio of He/D ions is 0.2 and Be content is 0.2%. A He-induced nanostructure layer is formed on the exposure surfaces of tungsten materials and the surface of the nanostructure is covered by a thin layer of Be and O. A fraction of the re-eroded Be from the target is deposited on a glassy carbon plate with line of sight to the tungsten target. Rutherford backscattering spectrometry analyses show that the Be redeposit layer is in the form of laminae. Small amounts of Mo, W and C are also found in the redeposited Be layer. Elastic recoil detection analyses show that D, He and H are also included in the redeposited Be layer.

Original languageEnglish
JournalJournal of Nuclear Materials
Volume442
Issue number1-3 SUPPL.1
DOIs
Publication statusPublished - Jun 17 2013

Fingerprint

Tungsten
Beam plasma interactions
tungsten
Plasmas
Nanostructures
interactions
Ions
Fluxes
Helium
Deuterium
Glassy carbon
Rutherford backscattering spectroscopy
Spectrometry
Erosion
glassy carbon
line of sight
erosion
deuterium
backscattering
ions

All Science Journal Classification (ASJC) codes

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

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Properties of deposited layer formed by interaction with Be seeded D-He mixture plasma and tungsten. / Tokunaga, Kazutoshi; Baldwin, M. J.; Nishijima, D.; Doerner, R. P.; Nagata, S.; Tsuchiya, B.; Kurishita, H.; Fujiwara, T.; Araki, K.; Miyamoto, Y.; Ohno, N.; Ueda, Y.

In: Journal of Nuclear Materials, Vol. 442, No. 1-3 SUPPL.1, 17.06.2013.

Research output: Contribution to journalArticle

Tokunaga, K, Baldwin, MJ, Nishijima, D, Doerner, RP, Nagata, S, Tsuchiya, B, Kurishita, H, Fujiwara, T, Araki, K, Miyamoto, Y, Ohno, N & Ueda, Y 2013, 'Properties of deposited layer formed by interaction with Be seeded D-He mixture plasma and tungsten', Journal of Nuclear Materials, vol. 442, no. 1-3 SUPPL.1. https://doi.org/10.1016/j.jnucmat.2013.05.006
Tokunaga, Kazutoshi ; Baldwin, M. J. ; Nishijima, D. ; Doerner, R. P. ; Nagata, S. ; Tsuchiya, B. ; Kurishita, H. ; Fujiwara, T. ; Araki, K. ; Miyamoto, Y. ; Ohno, N. ; Ueda, Y. / Properties of deposited layer formed by interaction with Be seeded D-He mixture plasma and tungsten. In: Journal of Nuclear Materials. 2013 ; Vol. 442, No. 1-3 SUPPL.1.
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