Modelling of hydrogen atoms reflection from an annealed tungsten fuzzy surfaces

D.H. Liu; S.Y. Dai; M. Wada; K.R. Yang; J.Y. Chen; D.P. Liu; N. Cherenda; D.Z. Wang

Nuclear Materials and Energy (Mar 2021)

Modelling of hydrogen atoms reflection from an annealed tungsten fuzzy surfaces

D.H. Liu,
S.Y. Dai,
M. Wada,
K.R. Yang,
J.Y. Chen,
D.P. Liu,
N. Cherenda,
D.Z. Wang

Affiliations

D.H. Liu: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China
S.Y. Dai: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China; DUT-BSU Joint Institute, Dalian University of Technology, Dalian 116024, People’s Republic of China; Corresponding authors at: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China (S.Y. Dai).
M. Wada: Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan
K.R. Yang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China
J.Y. Chen: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China
D.P. Liu: School of Electrical Engineering, Dalian University of Technology, Dalian 116024, People’s Republic of China
N. Cherenda: Department of Solid State Physics, Physics Faculty, Belarusian State University, Belarus
D.Z. Wang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China; Corresponding authors at: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People’s Republic of China (S.Y. Dai).

Journal volume & issue: Vol. 26
p. 100909

Abstract

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Modelling of the hydrogen reflection on tungsten smooth and fuzz surfaces under the low-energy hydrogen plasma bombardment has been performed with the three-dimensional kinetic Monte Carlo code SURO-FUZZ. The relative reflection coefficient of hydrogen atoms, i.e. the ratio of reflected hydrogen atoms on the tungsten fuzz surface to that on the tungsten smooth one, is employed to illustrate the change in the hydrogen reflection on the tungsten fuzz and smooth surfaces. The simulated relative reflection coefficient of hydrogen atoms shows a large discrepancy with the measured values obtained in the hydrogen plasma bombardment experiment. The impinging hydrogen particles with a low incident energy result in a small sputtering and large residual nanostructure existing on the tungsten fuzz surface, which lead to a small change in the relative reflection coefficient of hydrogen atoms. The discrepancy between simulations and experiments motivates us to take the impacts of the annealing effect into account in SURO-FUZZ code. Implementation of annealing effect into SURO-FUZZ has been benchmarked against the experimental data. The simulated temporal evolution of the hydrogen reflection coefficient is in reasonable agreement with the experimental data.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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