Displacement damage stabilization by hydrogen presence under simultaneous W ion damage and D ion exposure

Sabina Markelj , Thomas Schwarz-Selinger , Matic Pečovnik , Anze Zaloznik , Mitja Kelemen , Iztok Čadež , Johannes Bauer , Primoz Pelicon , Witold Chromiński , Łukasz Ciupiński

Abstract

Polycrystalline tungsten (W) samples were simultaneously irradiated by 10.8 MeV W ions and exposed to 300 eV deuterium (D) ions at different temperatures ranging from 450 K to 1000 K. After simultaneous W ion irradiation and D ion exposure the samples were additionally exposed to low-energy D ions at 450 K in order to populate all the defects created beforehand. The amount of damage created was evaluated by measuring D depth profiles and D thermal desorption spectra. Results were compared with data obtained in a sequential experiment where samples were first irradiated by 10.8 MeV W ions and only afterwards exposed to 300 eV D ions at 450 K to populate the created defects. At 450 K we observed a two times higher maximum D concentration for the simultaneous case as compared with the sequential case. At 600 K and 800 K the ratio between the simultaneous and sequential case decreases to about 1.6 and 1.2, respectively, and increases again to a factor of 2 at 1000 K. We attribute this dependence on temperature to the change in the concentration of mobile and trapped D during the simultaneous exposures, which is in line with theoretical calculations predicting that trapped D in a vacancy prevents vacancy annihilation with self-interstitials.
Author Sabina Markelj - Jozef Stefan Institute [Jozef Stefan Institute]
Sabina Markelj,,
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, Thomas Schwarz-Selinger - Max-Planck-Institute für Plasmaphisic, Teilinstitut Greifswald [Max Planck Institut für Plasmaphysik]
Thomas Schwarz-Selinger,,
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, Matic Pečovnik - Jozef Stefan Institute [Jozef Stefan Institute]
Matic Pečovnik,,
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, Anze Zaloznik - Jozef Stefan Institute [Jozef Stefan Institute]
Anze Zaloznik,,
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, Mitja Kelemen - Jozef Stefan Institute [Jozef Stefan Institute]
Mitja Kelemen,,
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, Iztok Čadež - Jozef Stefan Institute [Jozef Stefan Institute]
Iztok Čadež,,
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, Johannes Bauer - Max-Planck-Institute für Plasmaphisic, Teilinstitut Greifswald [Max Planck Institut für Plasmaphysik]
Johannes Bauer,,
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, Primoz Pelicon - [Jozef Stefan Institute]
Primoz Pelicon,,
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, Witold Chromiński (FMSE / DMD)
Witold Chromiński,,
- Division of Materials Design
, Łukasz Ciupiński (FMSE / DMD)
Łukasz Ciupiński,,
- Division of Materials Design
Journal seriesNuclear Fusion, ISSN 0029-5515, e-ISSN 1741-4326
Issue year2019
Vol59
No8
Pages1-17
Publication size in sheets4302.5
Keywords in Englishtungsten, deuterium retention, displacement damage, damage stabilization, nuclear reaction analysis, thermal desorption spectroscopy
ASJC Classification3104 Condensed Matter Physics; 3106 Nuclear and High Energy Physics
DOIDOI:10.1088/1741-4326/ab2261
URL https://iopscience.iop.org/article/10.1088/1741-4326/ab2261
Languageen angielski
File
Markelj_2019_Nucl._Fusion_59_086050.pdf 3.28 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 09-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 4; WoS Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.942; WoS Impact Factor: 2018 = 3.516 (2) - 2018=3.34 (5)
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