Understanding impurity transport in tokamak plasmas is crucial to control radiative losses and material migration in future magnetic fusion reactors. In this work we deploy the SolEdge2D-EIRENE code to model the boundary plasma in a WEST discharge, satisfactorily reproducing measurements of both upstream and divertor plasma conditions. The spatial distribution of oxygen, studied here as a representative light impurity, is compared to vacuum ultraviolet spectroscopy measurements acquired with an oscillating line of sight. The simulation captures a key feature of the experiment, namely a factor of ≃2 higher oxygen brightness in the inner divertor region compared to the outer one. This spatial asymmetry in oxygen concentration is interpreted by analyzing the balance of friction forces and thermal gradient forces that the light impurity exchanges with the main plasma.

了解托卡马克等离子体中的杂质传输对于控制未来的磁聚变反应堆中的辐射损耗和材料迁移至关重要。在这项工作中，我们部署了SolEdge2D-EIRENE代码以对WEST放电中的边界等离子体建模，从而令人满意地重现了上游和分流器等离子体条件的测量结果。将此处作为代表性的轻质杂质研究的氧气的空间分布与通过振荡视线获得的真空紫外光谱测量结果进行了比较。该模拟捕获了该实验的一个关键特征，即内部偏滤器区域的氧气亮度比外部偏滤器区域的氧气亮度高2倍。