Improvement of the detachment modeling in the SONIC simulation
Improvement of the detachment modeling in the SONIC simulation
复制标题
SONIC 模拟中分离建模的改进
DOI：
10.1016/j.jnucmat.2011.01.003
复制
发表时间：
2011
影响因子：
3.1
通讯作者：
et al
中科院分区：
文献类型：
--
作者：
Hoshino K;et al
为了改进脱离模拟，用一套积分偏滤器程序SONIC研究了除体积复合之外的各种过程对离子通量减少的影响。随着私有边径向扩散损耗的增加，离子密度和离子通量最多降低15%。在本文的模拟条件下，由于超音速流动正好发生在目标前方，因此超音速流动对通量降低的影响很小。由于碳氢解离过程的壁面泵浦或D中性循环的影响，离子通量的极向分布发生了显著的变化。然而，靶处的离子通量变化很小。由于径向扩散损失和壁面泵浦的共同作用，离子通量出现了微弱的翻滚。
In order to improve the detachment modelling, effects of various processes on ion flux reduction other than the volume recombination are investigated by using a suite of integrated divertor codes SONIC. The increase in the radial diffusion loss at the private edge decreases the ion density and the ion flux by 15% at most. The supersonic flow effect on flux reduction is small because the supersonic flow occurs just in front of the target under the present simulation condition. Due to effects of the wall pumping or D neutral recycling by hydrocarbon dissociation processes, the poloidal profile of the ion flux is significantly changed. However the change in the ion flux at the target is small. The weak rollover of the ion flux appears due to the combination of effects of the radial diffusion loss and the wall pumping.