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Effect of sputtering on self-damaged recrystallized W mirror specimens

Author:
Voitsenya, V.S.   Balden, M.   Belyaeva, A.I.   Alimov, V.Kh.   Tyburska-Püschel, B.   Galuza, A.A.   Kasilov, A.А.   Kolenov, I.V.   Konovalov, V.G.   Skoryk, O.O.   Solodovchenko, S.I.  


Journal:
Journal of Nuclear Materials


Issue Date:
2013


Abstract(summary):

The effect of heavy sputtering and of neutron irradiation simulated by displacement damaging with of 20 MeV W6+ ions on the optical properties of tungsten mirrors was studied. Ar+ ions with 600 eV of energy were used as imitation of charge exchange atoms ejected from fusion plasma. The ion fluence dependence of the surface topography and the optical properties of polycrystalline, recrystallized tungsten (grain size 20-100 mu m) were studied by optical microscopy, interferometry, reflectometry and ellipsometry. Furthermore, after sputtering in total a layer of 3.9 mu m in thickness, the orientation and the thickness of the eroded layer of many individual grains was determined by electron backscattering diffraction and confocal laser scanning microscopy. Concluding from the obtained data the neutron irradiation, at least at the damage level would be achieved in ITER, has not to make an additional contribution in the processes developing under impact of charge exchange atoms only. Published by Elsevier B.V.


Page:
375-381


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