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论文类型：期刊论文

发表时间：2017-03-01

发表刊物：FUSION ENGINEERING AND DESIGN

收录刊物：SCIE、EI

卷号：116

页面范围：5-9

ISSN号：0920-3796

关键字：Edge plasma; Divertor gap; Heat flux; Particle-in-cell

摘要：A two dimension-in-space and three dimension-in-velocity (2d3v) Particle-In-Cell (PIC) code is applied to investigate the plasma behaviors at the divertor gaps region in this work. Electron and D+ ion fluxes to the tile surface in the poloidal and toroidal gaps for different shaped edges are compared to demonstrate the optimized tile geometry. For poloidal gap, shaped edge in the shadowing side makes more ions penetrate into the gap, while shaped edge in the wetted side can mitigate the peak flux value. For toroidal gap, most ions entering the gap impinge on the side tile mainly due to the E x B drift, and shaped wetted edges also can mitigate the peak heat fluxes. In addition, effects of magnetic field inclination angle from toroidal direction on the plasma behaviors are simulated for poloidal and toroidal gaps, respectively. It is found that the magnetic field angles don't influence the plasma behaviors in poloidal gap; while significant changes have been observed in the toroidal gap. (C) 2017 Elsevier B.V. All rights reserved.