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Journal Article

Tungsten coating on JET divertor tiles for erosion/deposition studies

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Mayer,  M.
Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society;

Maier,  H.
Max Planck Society;

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Citation

Lehto, S., Likonen, J., Coad, J. P., Ahlgren, T., Hole, D. E., Mayer, M., et al. (2003). Tungsten coating on JET divertor tiles for erosion/deposition studies. Fusion Engineering and Design, 66-68, 241-245. doi:10.1016/S0920-3796(03)00291-6.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-3F0C-0
Abstract
Six Joint European Torus (JET) divertor tiles were coated with tungsten marker stripes for erosion/deposition studies. The average thickness was 3.4 μm and the film was uniform within 5% across and within 10% along the stripe. Small amounts of impurities C, Fe, Ni and Cr were found and the in-plane stress was 965 MPa. Resistance to high heat loads was tested in the Neutral Beam Test-bed at JET where a coated carbon fibre composite block was exposed to a total of 113 pulses with a maximum peak power density of 15.7 MW m-2 and a maximum surface temperature of 1280 °C. No visible changes as a result of thermal cycling nor sputtering of the film by deuterium could be detected.