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Gąsior P.♦, Czarnecka A.♦, Parys P.♦, Rosiński M.♦, Wołowski J.♦, Hoffman J., Szymański Z., Phillips V.♦, Rubel M.♦, Effective laser induced removal of co-deposited layers from plasma facing components in tokamak,
CZECHOSLOVAK JOURNAL OF PHYSICS, ISSN: 0011-4626, Vol.56, pp.B67-B72, 2006 Abstract:
An experimental set–up and spectroscopy diagnostic method for laser–induced fuel removal and decomposition of co–deposited layers on plasma–facing components from tokamaks are described. For irradiation of a graphite limiter tile from the TEXTOR tokamak Nd:YAG 3.5-ns pulse laser with a repetition rate of 10 Hz and single pulse energy of up to 0,8 J at 1,06 µm has been used. The spectroscopy system allowed recording of spectra in the visible wavelength range including CII and Dα spectral lines. The evolution of CII and Dα spectral lines was observed pulse–by–pulse during the co–deposit removal. The efficient ablation of the 45 µm thick co–deposit occured after approximately 50 laser pulses. Keywords:
tokamaks, laser ablation, spectroscopy, co–deposit removal Affiliations:
| Gąsior P. | - | Institute of Plasma Physics and Laser Microfusion (PL) | | Czarnecka A. | - | Institute of Plasma Physics and Laser Microfusion (PL) | | Parys P. | - | Institute of Plasma Physics and Laser Microfusion (PL) | | Rosiński M. | - | Institute of Plasma Physics and Laser Microfusion (PL) | | Wołowski J. | - | Institute of Plasma Physics and Laser Microfusion (PL) | | Hoffman J. | - | IPPT PAN | | Szymański Z. | - | IPPT PAN | | Phillips V. | - | Institute of Plasma Physics, Forschungszentrum Jülich (DE) | | Rubel M. | - | KTH, Association EURATOM-VR (SE) |
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