Author/Authors :
Lehto، نويسنده , , S. and Likonen، نويسنده , , J. and Coad، نويسنده , , J.P. and Ahlgren، نويسنده , , T. and Hole، نويسنده , , D.E. and Mayer، نويسنده , , M. and Maier، نويسنده , , H. and Kolehmainen، نويسنده , , J.، نويسنده ,
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.
Keywords :
Tungsten coating , JET , Divertor tiles , erosion , Deposition
