Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS

K. Piip, H.J. van der Meiden, K. Bystrov, L. Hämarik, J. Karhunen, M. Aints, M. Laan, P. Paris, H. Seemen, A. Hakola, S. Brezinsek

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Laser-induced breakdown spectroscopy (LIBS) is a promising method for quantifying the fuel content of the plasma-facing components of ITER both in between plasma discharges (in-situ. ) and after maintenance operations. The aim of the present study is to test the applicability of in-situ LIBS for monitoring deuterium (D) and helium (He) content of W samples exposed to fusion relevant plasma fluxes in the linear plasma device Pilot-PSI. The D loading was performed during 1000 s of plasma exposure at low (200-300 °. C) surface temperatures. Despite of low intensity and noisy LIBS spectra, H and D lines, at 656.1 and 656.3 nm, respectively, could be fitted with Lorentzian contours and reliably resolved at 1.2 mbar background pressure of argon. In the case of He loading, the samples were also exposed to plasma during 1000 s while the surface temperature reached values up to 720 °. C at the center. Already at 10- 2 mbar residual pressure of the device, the He I line at 587.6 nm was visible for the first 2-3 laser shots. We demonstrated that in-situ LIBS is a reliable method for detection of He and D retention in ITER-relevant materials. Nevertheless, for measuring relative and absolute concentrations of D and He in the ITER-relevant samples, further studies are needed.
Original languageEnglish
Pages (from-to)694-698
Number of pages5
JournalNuclear Materials and Energy
Volume12
Early online date2017
DOIs
Publication statusPublished - 1 Aug 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Laser induced breakdown spectroscopy
Helium
laser-induced breakdown spectroscopy
Deuterium
deuterium
helium
Plasmas
surface temperature
Plasma devices
H lines
D lines
Facings
Argon
plasma jets
shot
maintenance
line spectra
Fusion reactions
fusion
argon

Keywords

  • plasma surface interaction
  • LIBS
  • fuel retention
  • tungsten

Cite this

Piip, K., van der Meiden, H. J., Bystrov, K., Hämarik, L., Karhunen, J., Aints, M., ... Brezinsek, S. (2017). Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS. Nuclear Materials and Energy, 12, 694-698. https://doi.org/10.1016/j.nme.2016.12.034
Piip, K. ; van der Meiden, H.J. ; Bystrov, K. ; Hämarik, L. ; Karhunen, J. ; Aints, M. ; Laan, M. ; Paris, P. ; Seemen, H. ; Hakola, A. ; Brezinsek, S. / Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS. In: Nuclear Materials and Energy. 2017 ; Vol. 12. pp. 694-698.
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abstract = "Laser-induced breakdown spectroscopy (LIBS) is a promising method for quantifying the fuel content of the plasma-facing components of ITER both in between plasma discharges (in-situ. ) and after maintenance operations. The aim of the present study is to test the applicability of in-situ LIBS for monitoring deuterium (D) and helium (He) content of W samples exposed to fusion relevant plasma fluxes in the linear plasma device Pilot-PSI. The D loading was performed during 1000 s of plasma exposure at low (200-300 °. C) surface temperatures. Despite of low intensity and noisy LIBS spectra, H and D lines, at 656.1 and 656.3 nm, respectively, could be fitted with Lorentzian contours and reliably resolved at 1.2 mbar background pressure of argon. In the case of He loading, the samples were also exposed to plasma during 1000 s while the surface temperature reached values up to 720 °. C at the center. Already at 10- 2 mbar residual pressure of the device, the He I line at 587.6 nm was visible for the first 2-3 laser shots. We demonstrated that in-situ LIBS is a reliable method for detection of He and D retention in ITER-relevant materials. Nevertheless, for measuring relative and absolute concentrations of D and He in the ITER-relevant samples, further studies are needed.",
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Piip, K, van der Meiden, HJ, Bystrov, K, Hämarik, L, Karhunen, J, Aints, M, Laan, M, Paris, P, Seemen, H, Hakola, A & Brezinsek, S 2017, 'Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS', Nuclear Materials and Energy, vol. 12, pp. 694-698. https://doi.org/10.1016/j.nme.2016.12.034

Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS. / Piip, K.; van der Meiden, H.J.; Bystrov, K.; Hämarik, L.; Karhunen, J.; Aints, M.; Laan, M.; Paris, P.; Seemen, H.; Hakola, A.; Brezinsek, S.

In: Nuclear Materials and Energy, Vol. 12, 01.08.2017, p. 694-698.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS

AU - Piip, K.

AU - van der Meiden, H.J.

AU - Bystrov, K.

AU - Hämarik, L.

AU - Karhunen, J.

AU - Aints, M.

AU - Laan, M.

AU - Paris, P.

AU - Seemen, H.

AU - Hakola, A.

AU - Brezinsek, S.

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Laser-induced breakdown spectroscopy (LIBS) is a promising method for quantifying the fuel content of the plasma-facing components of ITER both in between plasma discharges (in-situ. ) and after maintenance operations. The aim of the present study is to test the applicability of in-situ LIBS for monitoring deuterium (D) and helium (He) content of W samples exposed to fusion relevant plasma fluxes in the linear plasma device Pilot-PSI. The D loading was performed during 1000 s of plasma exposure at low (200-300 °. C) surface temperatures. Despite of low intensity and noisy LIBS spectra, H and D lines, at 656.1 and 656.3 nm, respectively, could be fitted with Lorentzian contours and reliably resolved at 1.2 mbar background pressure of argon. In the case of He loading, the samples were also exposed to plasma during 1000 s while the surface temperature reached values up to 720 °. C at the center. Already at 10- 2 mbar residual pressure of the device, the He I line at 587.6 nm was visible for the first 2-3 laser shots. We demonstrated that in-situ LIBS is a reliable method for detection of He and D retention in ITER-relevant materials. Nevertheless, for measuring relative and absolute concentrations of D and He in the ITER-relevant samples, further studies are needed.

AB - Laser-induced breakdown spectroscopy (LIBS) is a promising method for quantifying the fuel content of the plasma-facing components of ITER both in between plasma discharges (in-situ. ) and after maintenance operations. The aim of the present study is to test the applicability of in-situ LIBS for monitoring deuterium (D) and helium (He) content of W samples exposed to fusion relevant plasma fluxes in the linear plasma device Pilot-PSI. The D loading was performed during 1000 s of plasma exposure at low (200-300 °. C) surface temperatures. Despite of low intensity and noisy LIBS spectra, H and D lines, at 656.1 and 656.3 nm, respectively, could be fitted with Lorentzian contours and reliably resolved at 1.2 mbar background pressure of argon. In the case of He loading, the samples were also exposed to plasma during 1000 s while the surface temperature reached values up to 720 °. C at the center. Already at 10- 2 mbar residual pressure of the device, the He I line at 587.6 nm was visible for the first 2-3 laser shots. We demonstrated that in-situ LIBS is a reliable method for detection of He and D retention in ITER-relevant materials. Nevertheless, for measuring relative and absolute concentrations of D and He in the ITER-relevant samples, further studies are needed.

KW - plasma surface interaction

KW - LIBS

KW - fuel retention

KW - tungsten

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U2 - 10.1016/j.nme.2016.12.034

DO - 10.1016/j.nme.2016.12.034

M3 - Article

VL - 12

SP - 694

EP - 698

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

SN - 2352-1791

ER -

Piip K, van der Meiden HJ, Bystrov K, Hämarik L, Karhunen J, Aints M et al. Loading of deuterium and helium by Pilot-PSI plasma and their detection by in-situ LIBS. Nuclear Materials and Energy. 2017 Aug 1;12:694-698. https://doi.org/10.1016/j.nme.2016.12.034