Effect of sputtering on self-damaged ITER-grade tungsten

Simulation of neutron irradiation and sputtering on ITER-grade tungsten was studied. The effects of neutron-induced displacement damage have been simulated by irradiation of tungsten target with W6+ ions of 20MeV energy. Bombardment by Ar+ ions with energy 600eV was used as imitation of impact of ch...

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Bibliographic Details
Published in:Journal of nuclear materials 2014-10, Vol.453 (1-3), p.60-65
Main Authors: Voitsenya, V.S., Balden, M., Bardamid, A.F., Belyaeva, A.I., Bondarenko, V.N., Skoryk, O.O., Shtan’, A.F., Solodovchenko, S.I., Sterligov, V.A., Tyburska-Püschel, B.
Format: Article
Language:English
Subjects:
Charge exchange
Energy (nuclear)
Irradiation
Nuclear engineering
Optical properties
Simulation
Sputtering
Tungsten
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Summary:Simulation of neutron irradiation and sputtering on ITER-grade tungsten was studied. The effects of neutron-induced displacement damage have been simulated by irradiation of tungsten target with W6+ ions of 20MeV energy. Bombardment by Ar+ ions with energy 600eV was used as imitation of impact of charge exchange atoms in ITER. The sputtering process was interrupted to perform in between measurements of the optical properties of the eroded surface and the mass loss. After sputtering was finished, the surface was thoroughly investigated by different methods for characterizing the surface relief developed due to sputtering. The damaging to, at least, the level that would be achieved in ITER does not lead to a decisive additional contribution to the processes under impact of charge exchange atoms only.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2014.06.037