@article{7961,
  author = {G. De Temmerman and T. W. Morgan and G. G. van Eden and T. de Kruif and M. Wirtz and J Matejicek and T Chraska and R.A. Pitts and G. M. Wright},
  title = {Effect of high-flux H/He plasma exposure on tungsten damage due to transient heat loads},
  abstract = {The thermal shock behaviour of tungsten exposed to high-flux plasma is studied using a high-power laser. The cases of laser-only, sequential laser and hydrogen (H) plasma and simultaneous laser plus H plasma exposure are studied. H plasma exposure leads to an embrittlement of the material and the appearance of a crack network originating from the centre of the laser spot. Under simultaneous loading, significant surface melting is observed. In general, H plasma exposure lowers the heat flux parameter (FHF) for the onset of surface melting by ∼25%. In the case of He-modified (fuzzy) surfaces, strong surface deformations are observed already after 1000 laser pulses at moderate FHF = 19 MJ m−2 s−1/2, and a dense network of fine cracks is observed. These results indicate that high-fluence ITER-like plasma exposure influences the thermal shock properties of tungsten, lowering the permissible transient energy density beyond which macroscopic surface modifications begin to occur.},
  year = {2015},
  journal = {Journal of Nuclear Materials},
  volume = {463},
  pages = {198 - 201},
  doi = {10.1016/j.jnucmat.2014.09.075},
  note = {PLASMA-SURFACE INTERACTIONS 21 Proceedings of the 21st International Conference on Plasma-Surface Interactions in Controlled Fusion Devices Kanazawa, Japan May 26-30, 2014},
  language = {eng},
}