4th International Workshop & Summer School on Plasma Physics 2010 | |
Simulation of defects in fusion plasma first wall materials | |
Troev, T.^1 ; Nankov, N.^1 ; Yoshiie, T.^2 | |
Institute for Nuclear Research and Nuclear Energy, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria^1 | |
Research Reactor Institute, Kyoto University, Kumatori-Cho, Sennan-Gun, Osaka-Fu 590-0494, Japan^2 | |
关键词: Displacement cascades; First wall materials; Interatomic potential; Interstitial clusters; Molecular dynamics simulations; Numerical calculation; Primary knock-on atoms; Single vacancies; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/516/1/012022/pdf DOI : 10.1088/1742-6596/516/1/012022 |
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来源: IOP | |
【 摘 要 】
Numerical calculations of radiation damages in beryllium, alpha-iron and tungsten irradiated by fusion neutrons were performed using molecular dynamics (MD) simulations. The displacement cascades efficiency has been calculated using the Norgett-Robinson-Torrens (NRT) formula, the universal pair-potential of Ziegler-Biersack-Littmark (ZBL) and the EAM inter-atomic potential. The pair potential overestimates the defects production by a factor of 2. The ZBL pair potential results and the EAM are comparable at higher primary knock-on atom (PKA) energies (E > 100 keV). We found that the most common types of defects are single vacancies, di-vacancies, interstitials and small number of interstitial clusters. On the bases of calculated results, the behavior of vacancies, empty nano-voids and nano-voids with hydrogen and helium were discussed.
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Simulation of defects in fusion plasma first wall materials | 926KB | download |