Helium load on W-O coatings grown by pulsed laser deposition

R. Mateus (Corresponding Author), D. Dellasega, M. Passoni, Z. Siketić, I. Bogdanović Radović, Antti Hakola, E. Alves

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

W-O deposits with complex morphologies and significant He contents will growth on the surface of plasma facing components exposed to He discharges. To mimic the re/co-deposition process, W-O coatings were loaded with He by implanting He+ ions on W films grown by pulsed laser deposition (PLD). The use of appropriate PLD experimental parameters such as pressurised Ar or He background atmospheres induces the deposition of porous or compact W structures enhancing afterwards the gathering of different amounts of O under exposure to atmospheric air. After multiple ion implantation stages using 150 keV, 100 keV and 50 keV incident He+ ion beams with a total fluence of 5 × 1017 ion/cm2, significant amounts of He were identified in porous coatings by Rutherford backscattering (RBS). Time-of-flight elastic recoil detection (ToF-ERDA) measurements showed that most of the implanted He was already released from the porous coatings five month after implantation, while for the case of compact layers the He content remains significant at deeper layers and smoothly decrease towards the surface, as result of a different morphology and nanostructure. The proposed method involving PLD and ion implantation seems adequate to produce W-O films load by He that may be used as reference samples for fusion investigations.

Original languageEnglish
Pages (from-to)215-221
Number of pages7
JournalSurface and Coatings Technology
Volume355
DOIs
Publication statusPublished - 15 Dec 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Helium
Pulsed laser deposition
pulsed laser deposition
helium
coatings
Ion implantation
Coatings
ion implantation
Ions
Rutherford backscattering spectroscopy
Ion beams
Nanostructures
implantation
backscattering
fluence
ions
Fusion reactions
Deposits
fusion
ion beams

Keywords

  • Helium load
  • Ion implantation
  • PLD
  • W coatings

Cite this

Mateus, R., Dellasega, D., Passoni, M., Siketić, Z., Bogdanović Radović, I., Hakola, A., & Alves, E. (2018). Helium load on W-O coatings grown by pulsed laser deposition. Surface and Coatings Technology, 355, 215-221. https://doi.org/10.1016/j.surfcoat.2018.02.089
Mateus, R. ; Dellasega, D. ; Passoni, M. ; Siketić, Z. ; Bogdanović Radović, I. ; Hakola, Antti ; Alves, E. / Helium load on W-O coatings grown by pulsed laser deposition. In: Surface and Coatings Technology. 2018 ; Vol. 355. pp. 215-221.
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abstract = "W-O deposits with complex morphologies and significant He contents will growth on the surface of plasma facing components exposed to He discharges. To mimic the re/co-deposition process, W-O coatings were loaded with He by implanting He+ ions on W films grown by pulsed laser deposition (PLD). The use of appropriate PLD experimental parameters such as pressurised Ar or He background atmospheres induces the deposition of porous or compact W structures enhancing afterwards the gathering of different amounts of O under exposure to atmospheric air. After multiple ion implantation stages using 150 keV, 100 keV and 50 keV incident He+ ion beams with a total fluence of 5 × 1017 ion/cm2, significant amounts of He were identified in porous coatings by Rutherford backscattering (RBS). Time-of-flight elastic recoil detection (ToF-ERDA) measurements showed that most of the implanted He was already released from the porous coatings five month after implantation, while for the case of compact layers the He content remains significant at deeper layers and smoothly decrease towards the surface, as result of a different morphology and nanostructure. The proposed method involving PLD and ion implantation seems adequate to produce W-O films load by He that may be used as reference samples for fusion investigations.",
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Mateus, R, Dellasega, D, Passoni, M, Siketić, Z, Bogdanović Radović, I, Hakola, A & Alves, E 2018, 'Helium load on W-O coatings grown by pulsed laser deposition', Surface and Coatings Technology, vol. 355, pp. 215-221. https://doi.org/10.1016/j.surfcoat.2018.02.089

Helium load on W-O coatings grown by pulsed laser deposition. / Mateus, R. (Corresponding Author); Dellasega, D.; Passoni, M.; Siketić, Z.; Bogdanović Radović, I.; Hakola, Antti; Alves, E.

In: Surface and Coatings Technology, Vol. 355, 15.12.2018, p. 215-221.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Mateus, R.

AU - Dellasega, D.

AU - Passoni, M.

AU - Siketić, Z.

AU - Bogdanović Radović, I.

AU - Hakola, Antti

AU - Alves, E.

PY - 2018/12/15

Y1 - 2018/12/15

N2 - W-O deposits with complex morphologies and significant He contents will growth on the surface of plasma facing components exposed to He discharges. To mimic the re/co-deposition process, W-O coatings were loaded with He by implanting He+ ions on W films grown by pulsed laser deposition (PLD). The use of appropriate PLD experimental parameters such as pressurised Ar or He background atmospheres induces the deposition of porous or compact W structures enhancing afterwards the gathering of different amounts of O under exposure to atmospheric air. After multiple ion implantation stages using 150 keV, 100 keV and 50 keV incident He+ ion beams with a total fluence of 5 × 1017 ion/cm2, significant amounts of He were identified in porous coatings by Rutherford backscattering (RBS). Time-of-flight elastic recoil detection (ToF-ERDA) measurements showed that most of the implanted He was already released from the porous coatings five month after implantation, while for the case of compact layers the He content remains significant at deeper layers and smoothly decrease towards the surface, as result of a different morphology and nanostructure. The proposed method involving PLD and ion implantation seems adequate to produce W-O films load by He that may be used as reference samples for fusion investigations.

AB - W-O deposits with complex morphologies and significant He contents will growth on the surface of plasma facing components exposed to He discharges. To mimic the re/co-deposition process, W-O coatings were loaded with He by implanting He+ ions on W films grown by pulsed laser deposition (PLD). The use of appropriate PLD experimental parameters such as pressurised Ar or He background atmospheres induces the deposition of porous or compact W structures enhancing afterwards the gathering of different amounts of O under exposure to atmospheric air. After multiple ion implantation stages using 150 keV, 100 keV and 50 keV incident He+ ion beams with a total fluence of 5 × 1017 ion/cm2, significant amounts of He were identified in porous coatings by Rutherford backscattering (RBS). Time-of-flight elastic recoil detection (ToF-ERDA) measurements showed that most of the implanted He was already released from the porous coatings five month after implantation, while for the case of compact layers the He content remains significant at deeper layers and smoothly decrease towards the surface, as result of a different morphology and nanostructure. The proposed method involving PLD and ion implantation seems adequate to produce W-O films load by He that may be used as reference samples for fusion investigations.

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Mateus R, Dellasega D, Passoni M, Siketić Z, Bogdanović Radović I, Hakola A et al. Helium load on W-O coatings grown by pulsed laser deposition. Surface and Coatings Technology. 2018 Dec 15;355:215-221. https://doi.org/10.1016/j.surfcoat.2018.02.089