Transformations of hydrocarbon radicals moving along a stainless steel tube |
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Authors: | A E Gorodetskii V L Bukhovets R Kh Zalavutdinov and A P Zakharov |
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Institution: | 1.Frumkin Institute of Physical Chemistry and Electrochemistry,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Transport of exhausted thermonuclear fuel in the ITER divertor and pumping duct was modeled on a specially designed dc glow
discharge setup using mass spectrometry, optical and electron microscopy, and electron probe microanalysis. Transport and
deposition of hydrocarbon radicals transferred in an H2/C
x
H
yx
mixture through a hollow stainless steel anode at a total mixture pressure of 8–212 Pa and a methane content to 15 mol %
were considered. It was shown that deposition of radicals and ions (CH3, C2H3, C2H5) with kinetic energies of 0.03–3 eV on the anode inner surface at 600 K was suppressed to a large extent. In the temperature
range of 600–800 K, deposition of ions and radicals with kinetic energy of ~3 eV was partially restored with the formation
of soft a-C:H films, while thermalized radicals were not condensed. |
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Keywords: | |
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