High‐flux source of low‐energy neutral beams using reflection of ions from metals

1992 ◽  
Vol 63 (11) ◽  
pp. 5279-5288 ◽  
Author(s):  
John W. Cuthbertson ◽  
Robert W. Motley ◽  
William D. Langer
Keyword(s):  
Low Energy ◽  
High Flux ◽  
Neutral Beams

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.

H- Ion Source And High Flux Neutral Beams

1988 ◽  
Author(s):  
A Fisher ◽  
H Lindenbaum ◽  
N Rostoker ◽  
C E. Wiswall ◽  
S L. Cartier ◽  
...  
Keyword(s):  
Ion Source ◽  
High Flux ◽  
Neutral Beams

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

scholarly journals Surface morphology and deuterium retention in tungsten and tungsten–rhenium alloy exposed to low-energy, high flux D plasma

2014 ◽  
Vol 454 (1-3) ◽  
pp. 136-141 ◽  
Author(s):  
V.Kh. Alimov ◽  
Y. Hatano ◽  
K. Sugiyama ◽  
M. Balden ◽  
M. Oyaidzu ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Retention ◽  
Rhenium Alloy ◽  
And Tungsten

Nanostructure evolution and surface modification of tungsten exposed to low energy, high flux deuterium plasma

2017 ◽  
Vol 125 ◽  
pp. 473-478 ◽  
Author(s):  
Wangguo Guo ◽  
Long Cheng ◽  
Jun Wang ◽  
Qingwei Fu ◽  
Shaoyang Qin ◽  
...  
Keyword(s):  
Surface Modification ◽  
Low Energy ◽  
High Flux ◽  
Deuterium Plasma
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