The sputtering of graphite due to the bombardment of hydrogen isotopes is one of the critical issues in successfully using graphite in the fusion environment. In this work, we use molecular dynamics method to simulate the sputtering by using the LAMMPS. Calculation results show that the peak values of the sputtering yield are located between 25 eV to 50 eV. After the energy of 25 eV, the higher incident energy cause the lower carbon sputtering yield. The temperature which is most likely to sputter is about 800 K for hydrogen, deuterium and tritium. Before the 800 K, the sputtering rates increase when the temperature increase. After the 800 K, they decrease with the temperature increase. Under the same temperature and energy, the sputtering rate of tritium is bigger than that of deuterium, the sputtering rate of deuterium is bigger than that of hydrogen.
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2017 25th International Conference on Nuclear Engineering
July 2–6, 2017
Shanghai, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5781-6
PROCEEDINGS PAPER
Molecular Dynamics Simulation of the Sputtering of Graphite due to Bombardment With Deuterium and Tritium in Fusion Environment
Qiang Zhao,
Qiang Zhao
North China Electric Power University, Beijing, Beijing China
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Yang Li,
Yang Li
North China Electric Power University, Beijing, Beijing China
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Zheng Zhang,
Zheng Zhang
North China Electric Power University, Beijing, Beijing China
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Xiaoping Ouyang
Xiaoping Ouyang
North China Electric Power University, Beijing, Beijing China
Search for other works by this author on:
Qiang Zhao
North China Electric Power University, Beijing, Beijing China
Yang Li
North China Electric Power University, Beijing, Beijing China
Zheng Zhang
North China Electric Power University, Beijing, Beijing China
Xiaoping Ouyang
North China Electric Power University, Beijing, Beijing China
Paper No:
ICONE25-67781, V003T02A064; 6 pages
Published Online:
October 17, 2017
Citation
Zhao, Q, Li, Y, Zhang, Z, & Ouyang, X. "Molecular Dynamics Simulation of the Sputtering of Graphite due to Bombardment With Deuterium and Tritium in Fusion Environment." Proceedings of the 2017 25th International Conference on Nuclear Engineering. Volume 3: Nuclear Fuel and Material, Reactor Physics and Transport Theory; Innovative Nuclear Power Plant Design and New Technology Application. Shanghai, China. July 2–6, 2017. V003T02A064. ASME. https://doi.org/10.1115/ICONE25-67781
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