Stabilization of defects by the presence of hydrogen in tungsten: simultaneous W-ion damaging and D-atom exposure

Etienne Augustin Marc Hodille, Sabina Markelj, T. Schwarz-Selinger, Ank Založnik, Matic Pečovnik, Mitja Kelemen, C. Grisolia

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The possible mutual influence and synergistic effect between defect production and the presence of hydrogen isotopes in the crystal lattice of tungsten is studied. For this purpose, we perform modeling of experimental data where polycrystalline tungsten samples were in one case sequentially irradiated by 10.8 MeV tungsten ions followed by low-energy deuterium exposure and in the other case simultaneously irradiated by tungsten ions, while exposed to deuterium atoms. Modeling of the measured deuterium depth profiles and thermal-desorption spectra for different irradiation temperatures is performed by the MHIMS (migration of hydrogen isotopes in materials) code. A model of trap creation due to tungsten ion irradiation during the deuterium atom exposures is implemented. In both experimental series, the deuterium desorption peaks corresponding to defects induced by tungsten irradiation are described by the same two de-trapping energies of 1.83 and 2.10 eV. The experiments give unambiguous proof that the presence of deuterium increases the overall trap density. The modeling reveals that the two trap concentrations are affected differently by the temperature and presence of deuterium: the concentration of the low-energy trap is significantly higher in the case of simultaneous exposure compared to sequential exposure, especially at high temperature (2.2 times higher at 1000 K). The concentration of the high-energy trap is only weakly affected by the presence of hydrogen.
Original languageEnglish
Article number016011
JournalNuclear Fusion
Volume59
Issue number1
Number of pages11
ISSN0029-5515
DOIs
Publication statusPublished - Jan 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences

Cite this

Hodille, E. A. M., Markelj, S., Schwarz-Selinger, T., Založnik, A., Pečovnik, M., Kelemen, M., & Grisolia, C. (2019). Stabilization of defects by the presence of hydrogen in tungsten: simultaneous W-ion damaging and D-atom exposure. Nuclear Fusion, 59(1), [016011]. https://doi.org/10.1088/1741-4326/aaec97
Hodille, Etienne Augustin Marc ; Markelj, Sabina ; Schwarz-Selinger, T. ; Založnik, Ank ; Pečovnik, Matic ; Kelemen, Mitja ; Grisolia, C. / Stabilization of defects by the presence of hydrogen in tungsten : simultaneous W-ion damaging and D-atom exposure. In: Nuclear Fusion. 2019 ; Vol. 59, No. 1.
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abstract = "The possible mutual influence and synergistic effect between defect production and the presence of hydrogen isotopes in the crystal lattice of tungsten is studied. For this purpose, we perform modeling of experimental data where polycrystalline tungsten samples were in one case sequentially irradiated by 10.8 MeV tungsten ions followed by low-energy deuterium exposure and in the other case simultaneously irradiated by tungsten ions, while exposed to deuterium atoms. Modeling of the measured deuterium depth profiles and thermal-desorption spectra for different irradiation temperatures is performed by the MHIMS (migration of hydrogen isotopes in materials) code. A model of trap creation due to tungsten ion irradiation during the deuterium atom exposures is implemented. In both experimental series, the deuterium desorption peaks corresponding to defects induced by tungsten irradiation are described by the same two de-trapping energies of 1.83 and 2.10 eV. The experiments give unambiguous proof that the presence of deuterium increases the overall trap density. The modeling reveals that the two trap concentrations are affected differently by the temperature and presence of deuterium: the concentration of the low-energy trap is significantly higher in the case of simultaneous exposure compared to sequential exposure, especially at high temperature (2.2 times higher at 1000 K). The concentration of the high-energy trap is only weakly affected by the presence of hydrogen.",
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Hodille, EAM, Markelj, S, Schwarz-Selinger, T, Založnik, A, Pečovnik, M, Kelemen, M & Grisolia, C 2019, 'Stabilization of defects by the presence of hydrogen in tungsten: simultaneous W-ion damaging and D-atom exposure', Nuclear Fusion, vol. 59, no. 1, 016011. https://doi.org/10.1088/1741-4326/aaec97

Stabilization of defects by the presence of hydrogen in tungsten : simultaneous W-ion damaging and D-atom exposure. / Hodille, Etienne Augustin Marc; Markelj, Sabina; Schwarz-Selinger, T.; Založnik, Ank; Pečovnik, Matic; Kelemen, Mitja; Grisolia, C.

In: Nuclear Fusion, Vol. 59, No. 1, 016011, 01.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Stabilization of defects by the presence of hydrogen in tungsten

T2 - simultaneous W-ion damaging and D-atom exposure

AU - Hodille, Etienne Augustin Marc

AU - Markelj, Sabina

AU - Schwarz-Selinger, T.

AU - Založnik, Ank

AU - Pečovnik, Matic

AU - Kelemen, Mitja

AU - Grisolia, C.

PY - 2019/1

Y1 - 2019/1

N2 - The possible mutual influence and synergistic effect between defect production and the presence of hydrogen isotopes in the crystal lattice of tungsten is studied. For this purpose, we perform modeling of experimental data where polycrystalline tungsten samples were in one case sequentially irradiated by 10.8 MeV tungsten ions followed by low-energy deuterium exposure and in the other case simultaneously irradiated by tungsten ions, while exposed to deuterium atoms. Modeling of the measured deuterium depth profiles and thermal-desorption spectra for different irradiation temperatures is performed by the MHIMS (migration of hydrogen isotopes in materials) code. A model of trap creation due to tungsten ion irradiation during the deuterium atom exposures is implemented. In both experimental series, the deuterium desorption peaks corresponding to defects induced by tungsten irradiation are described by the same two de-trapping energies of 1.83 and 2.10 eV. The experiments give unambiguous proof that the presence of deuterium increases the overall trap density. The modeling reveals that the two trap concentrations are affected differently by the temperature and presence of deuterium: the concentration of the low-energy trap is significantly higher in the case of simultaneous exposure compared to sequential exposure, especially at high temperature (2.2 times higher at 1000 K). The concentration of the high-energy trap is only weakly affected by the presence of hydrogen.

AB - The possible mutual influence and synergistic effect between defect production and the presence of hydrogen isotopes in the crystal lattice of tungsten is studied. For this purpose, we perform modeling of experimental data where polycrystalline tungsten samples were in one case sequentially irradiated by 10.8 MeV tungsten ions followed by low-energy deuterium exposure and in the other case simultaneously irradiated by tungsten ions, while exposed to deuterium atoms. Modeling of the measured deuterium depth profiles and thermal-desorption spectra for different irradiation temperatures is performed by the MHIMS (migration of hydrogen isotopes in materials) code. A model of trap creation due to tungsten ion irradiation during the deuterium atom exposures is implemented. In both experimental series, the deuterium desorption peaks corresponding to defects induced by tungsten irradiation are described by the same two de-trapping energies of 1.83 and 2.10 eV. The experiments give unambiguous proof that the presence of deuterium increases the overall trap density. The modeling reveals that the two trap concentrations are affected differently by the temperature and presence of deuterium: the concentration of the low-energy trap is significantly higher in the case of simultaneous exposure compared to sequential exposure, especially at high temperature (2.2 times higher at 1000 K). The concentration of the high-energy trap is only weakly affected by the presence of hydrogen.

KW - 114 Physical sciences

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DO - 10.1088/1741-4326/aaec97

M3 - Article

VL - 59

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 1

M1 - 016011

ER -