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Theoretical calculation of cesium deposition and co-deposition with electronegative elements on the plasma grid in negative ion sources
http://hdl.handle.net/10655/00013534
http://hdl.handle.net/10655/00013534b049d260-68b0-4854-88a1-0e07ed7936c6
名前 / ファイル | ライセンス | アクション |
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13691_Nucl.Mat.Eng (3.5 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-12-20 | |||||
タイトル | ||||||
タイトル | Theoretical calculation of cesium deposition and co-deposition with electronegative elements on the plasma grid in negative ion sources | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Work function | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Cs covered surface | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Negative ion source | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | NBI | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
LI, Heng
× LI, Heng× ZHANG, Xin× XU, Yuhong× LEI, Guangjiu× TSUMORI, Katsuyoshi× ISOBE, Mitsutaka× SHIMIZU, Akihiro× CUI, Zilin× ZHU, Yiqin× HU, Jun× NI, Yuxiang× GENG, Shaofei× LIU, Haifeng× WANG, Xianqu× HUANG, Jie× LIU, Hai× CHENG, Jun× TANG, Changjian× CFQS team |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We studied the work function of cesium deposition and co-deposition with the electronegative element on the plasma grid (PG) using the first-principles calculations. The impurity particles may exist in the background plasma and vacuum chamber wall, and the work function of the PG will be affected. The results indicate that the minimum work functions of pure cesium deposition on Mo (110), W (110), and Mo (112) are reached at a partial monolayer. They are 1.66 eV (σ = 0.56 θ), 1.69 eV (σ = 0.75 θ), and 1.75 eV (σ = 0.88 θ), respectively. An appropriate co-deposition model consisting of cesium with electronegative elements can further decrease the work function. The coverage of cesium and electronegative elements are both 0.34 θ in all the co-deposition models. The F-Cs co-deposition model where the Cs atom and F atom are aligned along the surface normal obtains the lowest work function. They are 1.31 eV for F-Cs on Mo (110), and 1.23 eV for F-Cs on W (110), respectively. The change in work function is linearly related to the change in dipole moment density with a slope of −167.03 VÅ. For pure cesium deposition, two factors control the change in dipole-moment density, one is the electron transfer between adsorbates and the substrate, and another one is the restructuring of surface atoms. There are two additional factors for the co-deposition model. One is the intrinsic dipole moment of the double layer, the other is the angle between the intrinsic dipole moment and the surface. The latter two factors play important roles in increasing the total dipole moment. | |||||
書誌情報 |
Nuclear Materials and Energy 巻 34, 号 March 2023, p. 101334, 発行日 2022-12-06 |
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出版者 | ||||||
出版者 | Elsevier | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2352-1791 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.nme.2022.101334 | |||||
権利 | ||||||
権利情報 | © 2022 The Author(s). | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.nme.2022.101334 | |||||
関連名称 | Publisher version | |||||
NAIS | ||||||
13691 |