Influence of exposure conditions on helium transport and bubble growth in tungsten

Abstract Helium diffusion, clustering and bubble nucleation and growth is modelled using the finite element method. The existing model from Faney et al. (Model Simul Mater Sci Eng 22:065010, 2018; Nucl Fusion 55:013014, 2015) is implemented with FEniCS and simplified in order to greatly reduce the n...

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Autores principales:	Rémi Delaporte-Mathurin, Mykola Ialovega, Etienne A. Hodille, Jonathan Mougenot, Yann Charles, Elodie Bernard, Céline Martin, Christian Grisolia
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7853f4caba414b00b2975034239b6a4c
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spelling	oai:doaj.org-article:7853f4caba414b00b2975034239b6a4c2021-12-02T16:17:33ZInfluence of exposure conditions on helium transport and bubble growth in tungsten10.1038/s41598-021-93542-92045-2322https://doaj.org/article/7853f4caba414b00b2975034239b6a4c2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93542-9https://doaj.org/toc/2045-2322Abstract Helium diffusion, clustering and bubble nucleation and growth is modelled using the finite element method. The existing model from Faney et al. (Model Simul Mater Sci Eng 22:065010, 2018; Nucl Fusion 55:013014, 2015) is implemented with FEniCS and simplified in order to greatly reduce the number of equations. A parametric study is performed to investigate the influence of exposure conditions on helium inventory, bubbles density and size. Temperature is varied from 120 K to 1200 K and the implanted flux of 100 eV He is varied from $$10^{17}\,{\text{m}^{-2}\, \text{s}^{-1}}$$ 10 17 m - 2 s - 1 to $$5 \times 10^{21}\, {\text{m}^{-2}\, \text{s}^{-1}}$$ 5 × 10 21 m - 2 s - 1 . Bubble mean size increases as a power law of time whereas the bubble density reaches a maximum. The maximum He content in bubbles was approximately $$4 \times 10^{8}$$ 4 × 10 8 He at $$5 \times 10^{21}\,{\text{m}^{-2}\, \text{s}^{-1}}$$ 5 × 10 21 m - 2 s - 1 . After 1 h of exposure, the helium inventory varies from $$5 \times 10^{16} \,{\text{m}^{-2}}$$ 5 × 10 16 m - 2 at low flux and high temperature to $$10^{25} \,{\text{m}^{-2}}$$ 10 25 m - 2 at high flux and low temperature. The bubbles inventory varies from $$5 \times 10^{12}$$ 5 × 10 12 bubbles m $$^{-2}$$ - 2 to $$2 \times 10^{19}$$ 2 × 10 19 bubbles m $$^{-2}$$ - 2 . Comparison with experimental measurements is performed. The bubble density simulated by the model is in quantitative agreement with experiments.Rémi Delaporte-MathurinMykola IalovegaEtienne A. HodilleJonathan MougenotYann CharlesElodie BernardCéline MartinChristian GrisoliaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rémi Delaporte-Mathurin Mykola Ialovega Etienne A. Hodille Jonathan Mougenot Yann Charles Elodie Bernard Céline Martin Christian Grisolia Influence of exposure conditions on helium transport and bubble growth in tungsten
description	Abstract Helium diffusion, clustering and bubble nucleation and growth is modelled using the finite element method. The existing model from Faney et al. (Model Simul Mater Sci Eng 22:065010, 2018; Nucl Fusion 55:013014, 2015) is implemented with FEniCS and simplified in order to greatly reduce the number of equations. A parametric study is performed to investigate the influence of exposure conditions on helium inventory, bubbles density and size. Temperature is varied from 120 K to 1200 K and the implanted flux of 100 eV He is varied from $$10^{17}\,{\text{m}^{-2}\, \text{s}^{-1}}$$ 10 17 m - 2 s - 1 to $$5 \times 10^{21}\, {\text{m}^{-2}\, \text{s}^{-1}}$$ 5 × 10 21 m - 2 s - 1 . Bubble mean size increases as a power law of time whereas the bubble density reaches a maximum. The maximum He content in bubbles was approximately $$4 \times 10^{8}$$ 4 × 10 8 He at $$5 \times 10^{21}\,{\text{m}^{-2}\, \text{s}^{-1}}$$ 5 × 10 21 m - 2 s - 1 . After 1 h of exposure, the helium inventory varies from $$5 \times 10^{16} \,{\text{m}^{-2}}$$ 5 × 10 16 m - 2 at low flux and high temperature to $$10^{25} \,{\text{m}^{-2}}$$ 10 25 m - 2 at high flux and low temperature. The bubbles inventory varies from $$5 \times 10^{12}$$ 5 × 10 12 bubbles m $$^{-2}$$ - 2 to $$2 \times 10^{19}$$ 2 × 10 19 bubbles m $$^{-2}$$ - 2 . Comparison with experimental measurements is performed. The bubble density simulated by the model is in quantitative agreement with experiments.
format	article
author	Rémi Delaporte-Mathurin Mykola Ialovega Etienne A. Hodille Jonathan Mougenot Yann Charles Elodie Bernard Céline Martin Christian Grisolia
author_facet	Rémi Delaporte-Mathurin Mykola Ialovega Etienne A. Hodille Jonathan Mougenot Yann Charles Elodie Bernard Céline Martin Christian Grisolia
author_sort	Rémi Delaporte-Mathurin
title	Influence of exposure conditions on helium transport and bubble growth in tungsten
title_short	Influence of exposure conditions on helium transport and bubble growth in tungsten
title_full	Influence of exposure conditions on helium transport and bubble growth in tungsten
title_fullStr	Influence of exposure conditions on helium transport and bubble growth in tungsten
title_full_unstemmed	Influence of exposure conditions on helium transport and bubble growth in tungsten
title_sort	influence of exposure conditions on helium transport and bubble growth in tungsten
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7853f4caba414b00b2975034239b6a4c
work_keys_str_mv	AT remidelaportemathurin influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT mykolaialovega influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT etienneahodille influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT jonathanmougenot influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT yanncharles influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT elodiebernard influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT celinemartin influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten AT christiangrisolia influenceofexposureconditionsonheliumtransportandbubblegrowthintungsten
_version_	1718384238132199424

Influence of exposure conditions on helium transport and bubble growth in tungsten

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