Formation mechanism of bubbles and holes on tungsten surface with low-energy and high-flux helium plasma irradiation in NAGDIS-II

2004 ◽  
Vol 329-333 ◽  
pp. 1029-1033 ◽  
Author(s):  
Dai Nishijima ◽  
M.Y Ye ◽  
N Ohno ◽  
S Takamura
Keyword(s):  
Formation Mechanism ◽  
Low Energy ◽  
Helium Plasma ◽  
High Flux ◽  
Plasma Irradiation ◽  
Tungsten Surface

scholarly journals Fluence Dependence of Surface Morphology and Deuterium Retention in W Bulks and Nanocrystalline W Films Exposed to Deuterium Plasma

2021 ◽  
Vol 11 (4) ◽  
pp. 1619
Author(s):  
Jing Yan ◽  
Xia Li ◽  
Kaigui Zhu
Keyword(s):  
Surface Morphology ◽  
Thermal Desorption Spectroscopy ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Plasma ◽  
Vacancy Clusters ◽  
Plasma Irradiation ◽  
Deuterium Retention ◽  
Fluence Dependence ◽  
Scanning Electron

The surface morphology of pure W bulks and nanocrystalline tungsten films was investigated after exposure to a low-energy (100 eV/D), high-flux (1.8 × 1021 D·m−2s−1) deuterium plasma. Nanocrystalline tungsten films of 6 μm thickness were deposited on tungsten bulks and exposed to deuterium plasma at various fluences ranging from 1.30 × 1025 to 5.18 × 1025 D·m−2. Changes in surface morphology from before to after irradiation were studied with scanning electron microscopy (SEM). The W bulk exposed to low-fluence plasma (1.30 × 1025 D·m−2) shows blisters. The blisters on the W bulk irradiated to higher-fluence plasma are much larger (~2 µm). The blisters on the surface of W films are smaller in size and lower in density than those of the W bulks. In addition, the modifications exhibit the appearance of cracks below the surface after deuterium plasma irradiation. It is suggested that the blisters are caused by the diffusion and aggregation of the deuterium-vacancy clusters. The deuterium retention of the W bulks and nanocrystalline tungsten films was studied using thermal desorption spectroscopy (TDS). The retention of deuterium in W bulks and W films increases with increasing deuterium plasma fluence when irradiated at 500 K.

Modeling of the impurity-induced silicon nanocone growth by low energy helium plasma irradiation

2021 ◽  
Author(s):  
Quan Shi ◽  
Shin Kajita ◽  
Shuyu Dai ◽  
Shuangyuan Feng ◽  
Noriyasu Ohno
Keyword(s):  
Low Energy ◽  
Helium Plasma ◽  
Plasma Irradiation

Surface morphology and helium retention on tungsten exposed to low energy and high flux helium plasma

2003 ◽  
Vol 313-316 ◽  
pp. 92-96 ◽  
Author(s):  
K. Tokunaga ◽  
R.P. Doerner ◽  
R. Seraydarian ◽  
N. Noda ◽  
Y. Kubota ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Low Energy ◽  
Helium Plasma ◽  
High Flux

Hybrid simulation research on formation mechanism of tungsten nanostructure induced by helium plasma irradiation

2015 ◽  
Vol 463 ◽  
pp. 109-115 ◽  
Author(s):  
Atsushi M. Ito ◽  
Arimichi Takayama ◽  
Yasuhiro Oda ◽  
Tomoyuki Tamura ◽  
Ryo Kobayashi ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Hybrid Simulation ◽  
Helium Plasma ◽  
Simulation Research ◽  
Plasma Irradiation

Black silicon with nanostructured surface formed by low energy helium plasma irradiation

2019 ◽  
Vol 487 ◽  
pp. 755-765 ◽  
Author(s):  
S. Takamura ◽  
T. Aota ◽  
H. Iwata ◽  
S. Maenaka ◽  
K. Fujita ◽  
...  
Keyword(s):  
Low Energy ◽  
Black Silicon ◽  
Helium Plasma ◽  
Nanostructured Surface ◽  
Plasma Irradiation

scholarly journals Micron-Bubble Formation on Polycrystal Tungsten due to Low-Energy and High-Flux Helium Plasma Exposure

2005 ◽  
Vol 46 (3) ◽  
pp. 561-564 ◽  
Author(s):  
Dai Nishijima ◽  
Mitsutaka Miyamoto ◽  
Hirotomo Iwakiri ◽  
Minyou Ye ◽  
Noriyasu Ohno ◽  
...  
Keyword(s):  
Bubble Formation ◽  
Low Energy ◽  
Helium Plasma ◽  
High Flux ◽  
Plasma Exposure

Surface modification of tungsten mirrors due to low-energy helium plasma irradiation in the compact PWI simulator APSEDAS

2009 ◽  
Vol T138 ◽  
pp. 014043 ◽  
Author(s):  
M Sakamoto ◽  
T Miyazaki ◽  
Y Higashizono ◽  
K Ogawa ◽  
K Ozaki ◽  
...  
Keyword(s):  
Surface Modification ◽  
Low Energy ◽  
Helium Plasma ◽  
Plasma Irradiation
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