EAST钨杂质输运特性分析

Analysis of tungsten impurity transport property in EAST

用基于蒙特卡罗方法的杂质输运程序DIVIMP模拟了EAST在加热功率Pin=8 MW的情况下边界层钨杂质输运过程并分析了钨杂质输运特性,其目的是为了合理设计第一壁和偏滤器靶板部件。DIVIMP模拟得到了低再循环、高再循环和脱靶运行条件下钨杂质在边界层的分布情况。模拟结果显示,钨在脱靶情况下所产生的杂质密度比其他运行模式所产生的杂质密度小。与碳杂质输运特性的模拟结果相比,钨杂质的密度有明显的下降,总体分布在1015m-3数量级上。

The tungsten impurity transport process and transport property in the edge plasma of EAST Tokamak with the heating power Pin=8 MW were studied by the simulation using the Monte Calro impurity transport code DIVIMP.This work was aimed at the design of first wall and diverter target plate components.The distribution of the tungsten impurity in the edge plasma with low recycling,high recycling and detachment operation regimes were obtained.The simulation results show,the tungsten impurity density is the lowest with the detachment operation regime comparing to the low recycling and high recycling operation regimes.Comparing to the simulation results of carbon impurity transport,the tungsten impurity density is smaller than the carbon impurity density,the density is at the level of the 1015 m^-3.