Study of deuterium retention in Be-W coatings with distinct roughness profiles

R. Mateus; Antti Hakola; V. Tiron; C. Porosnicu; C.P. Lungu; E. Alves

doi:10.1016/j.fusengdes.2017.01.018

Study of deuterium retention in Be-W coatings with distinct roughness profiles

R. Mateus (Corresponding Author), Antti Hakola, V. Tiron, C. Porosnicu, C.P. Lungu, E. Alves

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

Abstract

Three batches of pure beryllium (Be), pure tungsten (W) and mixed Be:W (50:50) coatings were deposited by using the thermionic vacuum arc (TVA) technique. Different superficial roughness and morphologies were obtained by adjusting the bias voltages in the substrate holder. The coatings were irradiated afterwards with 15keV 2H+ ions up to a fluence of 5e17ion/cm2 with the purpose to investigate the influence of the roughness parameters on the retention of deuterium in Be-W deposits in the absence of other co-deposited impurities. Current densities lower than 0.2W/cm2 were used to avoid the release of deuterium induced by heating loads. The results of the experiment point to the negligible effect of rugosity on the retention behaviour under energetic ion bombardment.

Original language	English
Pages (from-to)	464-467
Journal	Fusion Engineering and Design
Volume	124
DOIs	https://doi.org/10.1016/j.fusengdes.2017.01.018
Publication status	Published - 1 Nov 2017
MoE publication type	A1 Journal article-refereed

Funding

Keywords

beryllium
tungsten
retention
surface morphology

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10.1016/j.fusengdes.2017.01.018Licence: CC BY-NC-ND

Cite this

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title = "Study of deuterium retention in Be-W coatings with distinct roughness profiles",

abstract = "Three batches of pure beryllium (Be), pure tungsten (W) and mixed Be:W (50:50) coatings were deposited by using the thermionic vacuum arc (TVA) technique. Different superficial roughness and morphologies were obtained by adjusting the bias voltages in the substrate holder. The coatings were irradiated afterwards with 15keV 2H+ ions up to a fluence of 5e17ion/cm2 with the purpose to investigate the influence of the roughness parameters on the retention of deuterium in Be-W deposits in the absence of other co-deposited impurities. Current densities lower than 0.2W/cm2 were used to avoid the release of deuterium induced by heating loads. The results of the experiment point to the negligible effect of rugosity on the retention behaviour under energetic ion bombardment.",

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T1 - Study of deuterium retention in Be-W coatings with distinct roughness profiles

AU - Mateus, R.

AU - Hakola, Antti

AU - Tiron, V.

AU - Porosnicu, C.

AU - Lungu, C.P.

AU - Alves, E.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Three batches of pure beryllium (Be), pure tungsten (W) and mixed Be:W (50:50) coatings were deposited by using the thermionic vacuum arc (TVA) technique. Different superficial roughness and morphologies were obtained by adjusting the bias voltages in the substrate holder. The coatings were irradiated afterwards with 15keV 2H+ ions up to a fluence of 5e17ion/cm2 with the purpose to investigate the influence of the roughness parameters on the retention of deuterium in Be-W deposits in the absence of other co-deposited impurities. Current densities lower than 0.2W/cm2 were used to avoid the release of deuterium induced by heating loads. The results of the experiment point to the negligible effect of rugosity on the retention behaviour under energetic ion bombardment.

AB - Three batches of pure beryllium (Be), pure tungsten (W) and mixed Be:W (50:50) coatings were deposited by using the thermionic vacuum arc (TVA) technique. Different superficial roughness and morphologies were obtained by adjusting the bias voltages in the substrate holder. The coatings were irradiated afterwards with 15keV 2H+ ions up to a fluence of 5e17ion/cm2 with the purpose to investigate the influence of the roughness parameters on the retention of deuterium in Be-W deposits in the absence of other co-deposited impurities. Current densities lower than 0.2W/cm2 were used to avoid the release of deuterium induced by heating loads. The results of the experiment point to the negligible effect of rugosity on the retention behaviour under energetic ion bombardment.

KW - beryllium

KW - tungsten

KW - retention

KW - surface morphology

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DO - 10.1016/j.fusengdes.2017.01.018

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SN - 0920-3796

VL - 124

SP - 464

EP - 467

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Study of deuterium retention in Be-W coatings with distinct roughness profiles

Abstract

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