Modelling of carbon erosion and re-deposition for the EAST movable limiter

Hai XIE (谢海); Rui DING (丁锐); Junling CHEN (陈俊凌); Jizhong SUN (孙继忠)

doi:10.1088/2058-6272/aa4ee0

Plasma Science and Technology > 2017 > 19(4): 45603-045603. > DOI: 10.1088/2058-6272/aa4ee0

Hai XIE (谢海), Rui DING (丁锐), Junling CHEN (陈俊凌), Jizhong SUN (孙继忠). Modelling of carbon erosion and re-deposition for the EAST movable limiter[J]. Plasma Science and Technology, 2017, 19(4): 45603-045603. DOI: 10.1088/2058-6272/aa4ee0

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Modelling of carbon erosion and re-deposition for the EAST movable limiter

1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230021, People’s Republic of China 2 School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, People’s Republic of China

Funds: This work has been supported by the National Magnetic Confinement Fusion Science Program of China (Nos. 2013GB107004 and 2013GB105003), National Natural Science Foundation of China (Nos. 11375010, 11675218 and 11005125), and the Sino-German Center for Research Promotion under Contract No. GZ769.

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Received Date: July 20, 2016

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Abstract

Abstract

The movable limiter at the mid-plane of the Experimental Advanced Superconducting Tokamak (EAST) with carbon coatings on the surface was exposed to edge plasma to study the material erosion and re-deposition. After the experiments, the carbon erosion and re-deposition is modelled using the 3D Monte Carlo code ERO. The geometry of the movable limiter, 3D configuration of the plasma parameters and electromagnetic fields under both limiter and divertor configurations have been implemented into the code. In the simulations, the main uncertain parameters such as carbon concentration ρ_c in the background plasma and cross-field transport coefficient D⊥ in the vicinity of surface according to the ‘funneling model’, have been studied in comparison with experiments. The parameter ρc mainly influences the net erosion and deposition profiles of the two sides of the movable limiter, while D⊥ mostly changes the profiles on the top surface.
- modelling,
- EAST,
- limiter,
- erosion and deposition

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References (26)

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