Nano-scale structural features of stratified hydrocarbon films formed at interaction of plasma with surface in T-10 tokamak

• Published in: Journal of nuclear materials Vol. 415; no. 1; pp. S266 - S269
• Main Authors: Kolbasov, B.N., Stankevich, V.G., Svechnikov, N.Yu, Neverov, V.S., Kukushkin, A.B., Zubavichus, Y.V., Veligzhanin, A.A., Sukhanov, L.P., Menshikov, K.A., Lebedev, A.M., Rajarathnam, D., Khimchenko, L.N.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01-08-2011; Elsevier
• Subjects: Carbon
• ISSN: 0022-3115; 1873-4820
• DOI: 10.1016/j.jnucmat.2011.01.005

Hydrocarbon films and flakes (i.e. free standing films) with high atomic deuterium to carbon ratio formed at deuterium plasma discharges in T-10 tokamak are non-crystalline. They contain structure elements of cluster/nanopore type with typical sizes of about 1nm and interplane distances between X-ray scattering structures of 0.7, 0.24 and 0.12nm. Structural sp2- carbon states were found mainly on the wall side of flakes, and sp3-hybridized carbon states—on their plasma side. In situ monitoring of films growth and hydrogen isotope accumulation in them by means of Fourier-transform infrared (FT-IR) spectroscopy is proposed. The computational modeling of X-ray scattering by random ensembles of carbon nanostructures of various types suggests that a strong peak of X-ray diffraction (XRD) intensity may be caused by the toroids (toroidal carbon nanotubes) with torus radius of about 1nm.