Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.fusengdes.2005.06.018
Title: Spectroscopic studies of homogeneous thin carbon erosion films on mirrors and flakes with a high deuterium content formed in tokamak T-10
Authors: Svechnikov, N.Yu.
Stankevich, V.G.
Lebedev, A.M.
Menshikov, K.A.
Kolbasov, B.N.
Guseva, M.I.
Vukolov, K.Yu.
Rajarathnam, D. 
Kocherginsky, N.M. 
Kostetski, Yu. 
Keywords: Defects
Photoluminescence
Redeposited hydrocarbon films
Tokamak
Vibrational modes
Issue Date: Nov-2005
Citation: Svechnikov, N.Yu., Stankevich, V.G., Lebedev, A.M., Menshikov, K.A., Kolbasov, B.N., Guseva, M.I., Vukolov, K.Yu., Rajarathnam, D., Kocherginsky, N.M., Kostetski, Yu. (2005-11). Spectroscopic studies of homogeneous thin carbon erosion films on mirrors and flakes with a high deuterium content formed in tokamak T-10. Fusion Engineering and Design 75-79 (SUPPL.) : 339-344. ScholarBank@NUS Repository. https://doi.org/10.1016/j.fusengdes.2005.06.018
Abstract: Redeposited hydrocarbon films on plasma facing elements in tokamaks accumulate hydrogen isotopes. In the present study such films were made to redeposit on stainless steel mirror substrates as thin films and without any substrate as bare flakes with high deuterium content, under deuterium-plasma discharges inside T-10 tokamak vacuum chamber. These films were subjected to spectral characterizations through Fourier-transform infrared (FT-IR), electron paramagnetic resonance (EPR), and photoluminescence techniques. IR spectra showed the presence of two main deuterium states as observed by the CD 2,3 sp3 stretching modes at 2100-2200 cm-1 and the CD2 sp3 bending modes at 600-1100 cm-1. Among these, CD3 stretching mode at 2217 cm-1 may serve as a control for deuterium desorption during the cleanup process of the reactor. As a comparative measure, C60 films were also studied, the luminescence excitation spectrum of which showed similarity in peak positions with tokamak bare flakes pertained to sp2 luminescence centers. The observed spectral differences are mainly due to more localized sp2 states for C60 and sp3 states for tokamak flakes. EPR spectra of the bare flakes showed the defective states with a high spin density, ∼1019 cm-3 which serve as luminescence quenching centers, and provide a path for hydrogen isotopes adsorption. © 2005 Elsevier B.V. All rights reserved.
Source Title: Fusion Engineering and Design
URI: http://scholarbank.nus.edu.sg/handle/10635/88137
ISSN: 09203796
DOI: 10.1016/j.fusengdes.2005.06.018
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

10
checked on Oct 15, 2018

WEB OF SCIENCETM
Citations

10
checked on Oct 8, 2018

Page view(s)

37
checked on Oct 5, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.