@article{7261,
  author = {G. M. Wright and M. Mayer and K. Ertl and G. de Saint-Aubin and J. Rapp},
  title = {Hydrogenic retention in irradiated tungsten exposed to high-flux plasma},
  abstract = {Two sets of identical tungsten (W) targets are irradiated at 300K with 12.3MeV W4+ ions to peak damage levels ranging from 0.5 to 10 displacements per atom (dpa). This results in a damage profile that is peaked at similar to 0.8 mu m and extends to a depth of similar to 1.5 mu m. Both sets of targets are exposed to high-density (n(e,center) = 3 x 10(20) m(-3)), low-temperature (T-e,T-center = 1.6 eV) deuterium (D) plasma in Pilot-PSI. One set of irradiated targets is exposed at high surface temperatures (T-W = 950-680 K) and the other at low surface temperatures (T-W = 480-340 K). The surface temperature is determined by the local plasma conditions. Nuclear reaction analysis (NRA) is used to determine the D depth profiles at specific radial locations, thus giving a surface temperature scan of the D retention in the damaged W. Global retention is determined by thermal desorption spectroscopy, which yields total D retained in the target and also gives information of the different types of lattice defects that are trapping the D in the W lattice. The main results are that there is no measurable difference between the different dpa levels, implying a saturation of the retention enhancement at a level },
  year = {2010},
  journal = {Nuclear Fusion},
  volume = {50},
  number = {7},
  pages = {8},
  month = {Jul},
  isbn = {0029-5515},
  url = {<Go to ISI>://000278528000006 },
  note = {ISI Document Delivery No.: 607SXTimes Cited: 0Cited Reference Count: 23},
  language = {English},
}