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Indexed by:期刊论文

Date of Publication:2016-11-01

Journal:12th International Symposium on Fusion Nuclear Technology (ISFNT)

Included Journals:SCIE、EI、CPCI-S、Scopus

Volume:109

Page Number:330-334

ISSN No.:0920-3796

Key Words:Divertor gap; Tungsten wall; Physical sputtering

Abstract:Erosion of tungsten (W) is a very important issue for the future fusion device. The castellated divertor makes it more complicated due to complex geometry of the gap between the tiles. In this work, the plasma behaviors and resulting W tile erosion in the divertor tile gap region are studied by using a two dimension-in-space and three dimension-in-velocity (2d3 v) Particle-In-Cell (PIC) code. Deuterium ions (D+) and electrons are traced self-consistently in the simulation to provide the plasma background. Since there are lots of impurities, which may make a great impact on the tile erosion, in the divertor region to radiate the power, the erosion of W tile by different species are thus considered. The contributions of deuterium and impurities: Li, C, Ne, and Ar, to the W erosion, are studied under EAST conditions to show a straightforward insight. It is observed that the physical sputtering of W tile by impurities is much higher than that by the D ions, and the peak erosion region locates at the plasma-facing corners. (C) 2016 Elsevier B.V. All rights reserved.