ERO2.0 is a recently developed Monte‐Carlo code for modelling global erosion and redeposition in fusion devices. We report here on the code's application to ITER for studying the erosion of the beryllium (Be) first wall armour under burning plasma steady state diverted conditions. An important goal of the study is to provide synthetic signals for the design of two key diagnostics: the main chamber visible spectroscopy and the laser in‐vessel viewing systems. The simulations are performed using toroidally symmetric plasma backgrounds obtained by combining SOLPS simulations extended to the wall using the OSM‐EIRENE‐DIVIMP edge code package. These are then further combined with a shadowing model using magnetic field line tracing to provide a three‐dimensional correction for the flux patterns. The resulting plasma wetted area, which amounts to ∼10% of the total first wall area, is in excellent agreement with shadowing calculations obtained with the SMITER field line tracing code. The simulations reveal that the main Be erosion zones are located in regions intersected by the secondary separatrix, in particular the upper Be panels, which are close to the secondary X‐point. For the particular high‐density Q = 10 background plasma case studied here, ∼80% of the eroded Be is found to re‐deposit on main chamber surfaces. The rest migrates in almost equal parts to the inner and outer divertor and is deposited close to the strike lines.

中文翻译：

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使用ERO2.0对ITER中全球铍迁移进行的首次蒙特卡洛建模

ERO2.0是最近开发的蒙特卡洛代码，用于对聚变设备中的整体腐蚀和再沉积建模。我们在此报告该代码在ITER上的应用，以研究在燃烧的等离子体稳态转移条件下铍（Be）第一壁装甲的腐蚀。该研究的一个重要目标是为两个关键诊断的设计提供合成信号：主室可见光谱和激光血管内观察系统。通过使用OSM‐EIRENE‐DIVIMP边缘代码包将扩展到墙壁的SOLPS仿真结合起来获得的环形对称等离子体背景进行仿真。然后将它们与使用磁场线跟踪的阴影模型进一步结合，以对磁通量模式进行三维校正。产生的等离子润湿区域，大约占第一壁总面积的10％，这与SMITER场线跟踪代码获得的阴影计算非常吻合。模拟结果表明，主要的Be侵蚀带位于次要分离线相交的区域，特别是上部Be面板，其靠近次要X点。对于特定的高密度Q  = 10本底等离子体案例研究，发现约80％的腐蚀Be重新沉积在主腔室表面上。其余部分几乎等分地迁移到内部和外部分流器，并靠近触击线沉积。