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Be-W films preparation and characterization
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Lungu, P. Cristian; Mustata, Ion; Anghel, Alexandru; Lungu, Ana Mihaela; Pompilian, Oana; Dutu, Elena; Morjan, Ion; Minea, Radu; Oproiu, Constantin; Dudu, Dorin; Vata, Ion; Ivanov, Eugeniu; Logofatu, Constantin; Negrila, Catalin; Lazarescu, Mihai; Miculescu, Florin
Romania |
The study of interactions between main materials used in the thermonuclear fusion reaction chamber is of the great interest novadays. By using the original thermionic vacuum arc (TVA) method [1] developed by our team, were prepared nanostructured Be-W films in order to reproduce the possible formation of Be based compounds during the fusion device operation. Two independently electron beam evaporators were used to produce simultaneously plasmas in pure Be and W vapors. The respective plasmas were controlled by the electron beam emitted by the heated cathodes. The process parameters were studied and optimized.
The films were deposited on Cu, Si and graphite substrates and were characterized by optical, scanning electron and transmission electron microscopies (OM, SEM, and TEM), X-ray Photoelectron spectroscopy (XPS) and Rutherford Backscattering Spectroscopy (RBS) before and after irradiations using a linear electron beam accelerator of few KeV and a 100 W continuous wave CO2 laser having a beam diameter of 5±1 mm in order to determine the thermal shock resistance and various compound formation
References:
[1] C P Lungu, I Mustata, V Zaroschi, A M Lungu, A Anghel, P Chiru, Marek Rubel, Paul Coad, G F Matthews and JET-EFDA Contributors, Phys. Scr. on-line, feb. (2007)
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