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| 001 | 844182 | ||
| 005 | 20240711113747.0 | ||
| 024 | 7 | _ | |a 10.1088/1402-4896/aa93a2 |2 doi |
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| 037 | _ | _ | |a FZJ-2018-01634 |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Sakamoto, Ryuichi |0 0000-0002-4453-953X |b 0 |e Corresponding author |
| 245 | _ | _ | |a Surface morphology in tungsten and RAFM steel exposed to helium plasma in PSI-2 |
| 260 | _ | _ | |a Bristol |c 2017 |b IoP Publ. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Impact of the helium plasma exposure on the surface modification in tungsten and reduced activation ferritic/martensitic (RAFM) steel have been investigated on the linear plasma device PSI-2 assuming the condition of DEMO first wall. In tungsten, a nanoscale undulating surface structure, which has a periodic arrangement, is formed under low temperature conditions below fuzz nanostructure formation threshold ~1000 K. Interval and direction of the undulation shows dependence on the crystal orientation. A large variation in surface level up to 200 nm has been observed among grains at a fluence of $3\times {10}^{26}$ He m−2 showing dependence of the surface erosion rate on the crystal orientation. The {100} plane in which the undulating surface structure is not formed shows the highest erosion rate. This significant erosion is due to the multistage sputtering through impurity. In RAFM steel, sponge-like nanostructure is developed and it grows with increasing helium fluence beyond 1 μm. In the sponge-like nanostructure, a composition change from the base material is observed in which the tungsten ratio increases while the iron ratio decreases showing differences in sputtering ratio depending on the atomic mass. |
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| 700 | 1 | _ | |a Pieters, Gregory |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Rousseau, Bernard |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Grisolia, Christian |0 P:(DE-HGF)0 |b 7 |
| 700 | 1 | _ | |a Yoshida, Naoaki |0 P:(DE-HGF)0 |b 8 |
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