This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/2014/T159/014039 in citations.
Erosion, formation of deposited layers and fuel retention for beryllium under the influence of plasma impurities
Erosion, formation of deposited layers and fuel retention for beryllium under the influence of plasma impurities
The impact of argon as a seeded plasma impurity on the plasma–material interaction properties of beryllium was studied in the PISCES-B linear plasma device. When exposed to pure deuterium plasma, the surface of beryllium forms a fine-scale grass-like structure and contains a significant fraction of...
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Personal Name(s): | Kreter, A. (Corresponding Author) |
---|---|
Dittmar, T. / Nishijima, D. / Doerner, R. P. / Baldwin, M. J. / Schmid, K. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physica scripta, T159 (2014) S. 014039 |
Imprint: |
Bristol
IoP Publ.
2014
|
DOI: |
10.1088/0031-8949/2014/T159/014039 |
Document Type: |
Journal Article |
Research Program: |
Plasma-wall interactions |
Publikationsportal JuSER |
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520 | |a The impact of argon as a seeded plasma impurity on the plasma–material interaction properties of beryllium was studied in the PISCES-B linear plasma device. When exposed to pure deuterium plasma, the surface of beryllium forms a fine-scale grass-like structure and contains a significant fraction of deuterium, leading to the reduction of the sputtering yield. An argon fraction in plasma of 10% prevents the formation of rough surface and reduces the deuterium retention in the beryllium target by >50%. Consequently, the beryllium sputtering yield in the presence of argon remains at a level close to the prediction by the binary collision code TRIM. The total retention of deuterium in co-deposited layers remains at a similar level when argon is added, since a higher amount of deposited Be is compensated by a lower D/Be value. Aluminium also forms a fine-scale surface structure and displays a reduction of the effective sputtering yield when exposed to pure deuterium plasma and can therefore be considered as a non-toxic proxy for studying selected plasma–material interaction properties of beryllium. | ||
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