@article{oai:nifs-repository.repo.nii.ac.jp:00010733,
 author = {SAKAMOTO,  Ryuichi and BERNARD, Elodie and KRETER, Arkadi and YOSHIDA,  Naoaki},
 issue = {1},
 journal = {Nuclear Fusion},
 month = {Dec},
 note = {0000-0002-4453-953X, Impact of crystal orientation on the surface morphology of the helium plasma exposed tungsten has been investigated on the linear device PSI-2. A nanoscale undulating surface structure having a periodic arrangement is formed for temperatures below 1073 K, in contrast to the fuzz nanostructure formation in a higher temperature range. The crests of undulation align with the  〈1 0 0〉  direction. The interval of the undulation is narrowest at the crystal grain
of {1 1 0} surface. The interval becomes wider as the crystal grain surface tilts away from the {1 1 0} surface, and the undulating surface structure is not formed near the {1 0 0} surface. The height of undulations is  8 nm, independently of the interval of the undulations, and it corresponds to the depth of the layer heavily damaged due to helium plasma exposure.},
 title = {Surface morphology of tungsten exposed to helium plasma at temperatures below fuzz formation threshold 1073 K},
 volume = {57},
 year = {2016}
}