Molecular Dynamics Simulations of the Interactions Between Tungsten Dust and Beryllium Plasma-Facing Material

NIU Guojian (牛国鉴); LI Xiaochun (李小椿); XU Qian (徐倩); YANG Zhongshi (杨钟时); LUO Guangnan (罗广南)

doi:10.1088/1009-0630/17/12/16

Plasma Science and Technology > 2015 > 17(12): 1072-1077. > DOI: 10.1088/1009-0630/17/12/16

NIU Guojian (牛国鉴), LI Xiaochun (李小椿), XU Qian (徐倩), YANG Zhongshi (杨钟时), LUO Guangnan (罗广南). Molecular Dynamics Simulations of the Interactions Between Tungsten Dust and Beryllium Plasma-Facing Material[J]. Plasma Science and Technology, 2015, 17(12): 1072-1077. DOI: 10.1088/1009-0630/17/12/16

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Molecular Dynamics Simulations of the Interactions Between Tungsten Dust and Beryllium Plasma-Facing Material

1Institute of Plasma Physics Chinese Academy of Sciences, Hefei 230031, China 2University of Science and Technology of China, Hefei 230031, China

Funds: supported by the National Magnetic Confinement Fusion Science Program of China (Nos. 2013GB105001, 2013GB105002, and 2015GB109001), National Natural Science Foundation of China (Nos. 11205198, 11305213 and 11405201), as well as Technological Development Grant of Hefei Science Center of CAS (No. 2014TDG-HSC003)

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Received Date: December 08, 2014

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Abstract

Abstract

In the present research, molecular dynamics simulation is applied to study the interactions between tungsten dusts and a beryllium plasma-facing material surface. Calculation results show that it is quite difficult for nanometer-size dust particles to damage the plasma-facing material surface, which is different from the micrometer-size ones. The reason may be the size difference between dust and crystal grains. The depth of dust penetration into plasma-facing materials is closely related to the incident velocity, and the impacting angle also plays an important role. Dust and material surface damage is also investigated. Results show that both incident velocity and angle can significantly influence the damage.
- molecular dynamics,
- tokamaks,
- dust,
- plasma-facing materials

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References

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