Voitsenya, V. S. and Ogorodnikova, O. V. and Bardamid, A. F. and Bondarenko, V. N. and Konovalov, V. G. and Lytvyn, P. M. and Marot, L. and Ryzhkov, I. V. and Shtan`, A. F. and Skoryk, O. O. and Solodovchenko, S. I.. (2018) Sputtering Effects on Mirrors Made of Different Tungsten Grades. Journal of Nuclear Materials, 500. pp. 56-63.
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Official URL: https://edoc.unibas.ch/94726/
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Abstract
Because tungsten (W) is used in present fusion devices and it is a reference material for ITER divertor and possible plasma-facing material for DEMO, we strive to understand the response of different W grades to ion bombardment. In this study, we investigated the behavior of mirrors made of four polycrystalline W grades under long-term ion sputtering. Argon (Ar) and deuterium (D) ions extracted from a plasma were used to investigate the effect of projectile mass on surface modification. Depending on the ion fluence, the reflectance measured at normal incidence was very different for different W grades. The lowest degradation rate of the reflectance was measured for the mirror made of recrystallized W. The highest degradation rate was found for one of the ITER-grade W samples. Pre-irradiation of a mirror with 20-MeV W6+ ions, as simulation of neutron irradiation in ITER, had no noticeable influence on reflectance degradation under sputtering with either Ar or D ions.
| Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer) |
|---|---|
| UniBasel Contributors: | Marot, Laurent |
| Item Type: | Article, refereed |
| Article Subtype: | Research Article |
| Publisher: | Elsevier |
| ISSN: | 0022-3115 |
| e-ISSN: | 1873-4820 |
| Note: | Publication type according to Uni Basel Research Database: Journal article |
| Identification Number: | |
| Last Modified: | 13 Jun 2023 12:43 |
| Deposited On: | 13 Jun 2023 12:43 |
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