Abstract The In-Vessel Viewing System (IVVS) is a metrology instrument designed for deployment inside the ITER Vacuum Vessel (VV) to assess any damage, erosion or displacements of the Plasma-Facing Components (PFCs) through the lifetime of the ITER experiment. The latest developments of the IVVS have identified the Incidence-Angle-Dependent Reflectivity (IADR) of the PFCs to be critical to the assessment of the coverage of the IVVS within the VV. Some ITER PFC prototypes have now been manufactured and a specific instrument has been developed to measure their IADR on site, in an IVVS-like geometry with 100 dB dynamic range. This work presents the first measurements of manufactured ITER PFCs’ IADR together with an assessment of the impact of the IADR on the effective coverage of the viewing channel of the IVVS operating through amplitude-modulated lidar.

中文翻译：

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面向等离子体组件的角度相关反射率的测量以及对 ITER VV 的 IVVS 测量覆盖率估计的影响的评估

摘要 容器内观察系统 (IVVS) 是一种计量仪器，设计用于部署在 ITER 真空容器 (VV) 内，以评估 ITER 实验整个生命周期内面向等离子体组件 (PFC) 的任何损坏、侵蚀或位移。IVVS 的最新发展已确定 PFC 的入射角相关反射率 (IADR) 对评估 VV 内 IVVS 的覆盖范围至关重要。现在已经制造了一些 ITER PFC 原型，并开发了一种特定的仪器来现场测量它们的 IADR，具有 100 dB 动态范围的类 IVVS 几何形状。