Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device
Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device
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DOI：
10.1016/j.nme.2020.100853
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发表时间：
2020-11
影响因子：
2.6
通讯作者：
M. Shoji;G. Kawamura;J. Romazanov;A. Kirschner;A. Eksaeva;D. Borodin;S. Masuzaki;S. Brezinsek
中科院分区：
文献类型：
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作者：
M. Shoji;G. Kawamura;J. Romazanov;A. Kirschner;A. Eksaeva;D. Borodin;S. Masuzaki;S. Brezinsek
将三维蒙特卡罗杂质输运和等离子体表面相互作用代码ERO2.0应用于大螺旋装置（LHD）的全环面模型。为了找到利用杂质粉末滴管（IPD）进行有效实时壁化（硼化）的最佳实验条件，在不同的实验条件下，对导流器组件和真空容器上硼通量密度的环向和极向分布进行了研究。利用EMC3-EIRENE代码提供的背景等离子体中的DUSTT代码计算来自IPD提供的硼粉的中性硼原子的源谱。利用ERO2.0进行的模拟表明，由于封闭的螺旋导流器区域的环形局部硼通量密度，较高的等离子体密度操作不适合进行有效的壁调节。ERO2.0模拟成功地揭示了封闭螺旋导流器区域内硼通量密度呈环形均匀的壁面调理的最佳实验条件。
The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD). In order to find an optimum experimental condition for effective real-time wall conditioning (boronization) using an Impurity Powder Dropper (IPD), the toroidal and poloidal distribution of the boron flux density on the divertor components and the vacuum vessel are surveyed in various experimental conditions. The source profile of the neutral boron atoms originated from boron powders supplied from the IPD is calculated using the DUSTT code in background plasmas provided by the EMC3-EIRENE code. The simulations using ERO2.0 predict that higher plasma density operation is inappropriate for the effective wall conditioning because of the toroidally localized boron flux density in a closed helical divertor region. The ERO2.0 simulations have successfully revealed an optimum experimental condition for the wall conditioning with the toroidally uniform boron flux density in the closed helical divertor region.