Abstract In-vessel lighting system is being developed for ITER. The diagnostic system is for inspecting and detecting eventual damages and defects of in-vessel components between discharges by illuminating the vacuum vessel with light sources. In this work, feasibility study of the in-vessel lighting system is performed using a ray tracing simulation. We installed sources and detectors in a ray tracing model using the field of views of wide-angle viewing systems and calculated the radiance profiles at detectors for different wall reflection scenarios. It was found that the wall is uniformly illuminated when the wall has a diffuse reflectance while the specular case has more brightness. We will discuss feasibility of the diagnostics system based on expected signal and noise levels.

中文翻译：

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ITER船内照明系统的光线追踪研究

摘要 正在为ITER开发船内照明系统。该诊断系统用于通过用光源照射真空容器来检查和检测放电之间的容器内部件的最终损坏和缺陷。在这项工作中，船内照明系统的可行性研究是使用光线追踪模拟进行的。我们使用广角观察系统的视野在光线追踪模型中安装了光源和探测器，并针对不同的墙壁反射场景计算了探测器的辐射分布。发现当墙壁具有漫反射时墙壁被均匀照亮，而镜面情况具有更高的亮度。我们将讨论基于预期信号和噪声水平的诊断系统的可行性。