Sputtering and reflection from a beryllium surface: effects of hydrogen isotope mass, impact position and surface binding energy

Nuclear Fushion

article

S. Shermukhamedov¹  L. Chen¹  Renat Nazmutdinov²  Michael Probst¹ 

[1] Institute of Ion Physics and Applied Physics, University of Innsbruck;Kazan National Technological Research University;School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology

关键词: sputtering simulations;    molecular dynamics;    plasma–surface interaction;    machinelearned potential energy function;    neural networks;    computational materials science;   

DOI  :  10.1088/1741-4326/ac592a

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Atomistic simulations with machine-learned potential energy functions are employed for understanding the mechanisms driving the sputtering of beryllium by low-energy deuterium and tritium atoms and the details of their retention on pristine beryllium surfaces. The interaction between hydrogen/deuterium/tritium and beryllium surfaces regarding erosion yields is investigated by molecular dynamics simulations. The erosion yields of both hydrogen isotopes are similar for the same kinetic energies. Concentrating on deuterium, its impact on specific surface sites is analyzed. Finally, analytical expressions are used to predict the energy spectra of sputtered atoms.

【 授权许可】

Unknown