Microstructure and Deuterium Retention of Tungsten Deposited by Hollow Cathode Discharge in Deuterium Plasma
Zhong-Chao Sun1 , Zi-Wei Lian1 , Wei-Na Qiao1 , Jian-Gang Yu1 , Wen-Jia Han1 , Qing-Wei Fu1,2 , Kai-Gui Zhu1,2**
1 Department of Physics, Beihang University, Beijing 1001912 Beijing Key Laboratory of Advanced Nuclear Energy Materials and Physics, Beihang University, Beijing 100191
Abstract ：Tungsten has been chosen as one of the most promising candidates as the plasma-facing material in future fusion reactors. Although tungsten has numerous advantages compared with other materials, issues including dust are rather difficult to deal with. Dust is produced in fusion devices by energetic plasma-surface interaction. The re-deposition of dust particles could cause the retention of fuel atoms. In this work, tungsten is deposited with deuterium plasma by hollow cathode discharge to simulate the dust production in a tokamak. The morphology of the deposited tungsten can be described as a film with spherical particles on it. Thermal desorption spectra of the deposited tungsten show extremely high desorption of the peak positions. It is also found that there is a maximum retention of deuterium in the deposited tungsten samples due to the dynamic equilibrium of the deposition and sputtering process on the substrates.
收稿日期: 2017-07-06
出版日期: 2017-11-24
:
52.55.Fa
(Tokamaks, spherical tokamaks)
52.40.Hf
(Plasma-material interactions; boundary layer effects)
28.52.Fa
(Materials)
引用本文:
. [J]. 中国物理快报, 2017, 34(12): 125203-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/34/12/125203
或
https://cpl.iphy.ac.cn/CN/Y2017/V34/I12/125203
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2017, Vol. 34 
