Twelve ITER-like plasma-facing units made of tungsten were exposed in the WEST tokamak divertor, with three plasma-facing units (PFUs) significantly overexposed to plasma heat flux: one sharp-edged PFU (vertical misalignment h = 0.8 mm) and two chamfered PFUs (h =0.6 mm and 0.3 mm, respectively). This paper describes the first temperature analysis obtained with a very high spatial resolution infrared camera (pixel size ∼ 0.1 mm) on the misaligned PFU edges and shows the consistency obtained on the parallel heat flux derived from these measurements. The analysis is focused on the hottest areas of the PFU misaligned leading edges, since the temperature detection threshold of the VHR camera is high (T threshold,BB ≈ 370 °C). The heat flux parallel to the magnetic field lines is assessed by matching the toroidal temperature profile in the vicinity of the leading edge with 3D finite element modelling. The tungsten emissivity assumed in this study is 0.6, which is consistent...

中文翻译：

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在WEST中使用高分辨率红外摄像头对类似ITER的等离子面对单元的未对准前端进行首次分析

在WEST托卡马克分流器中暴露了十二个由ITER制成的，类似钨的面向等离子体的单元，其中三个面向等离子体的通量（PFU）明显暴露于等离子体热流中：一个尖锐的PFU（垂直未对准h = 0.8 mm）和两个倒角的PFU（分别为h = 0.6 mm和0.3 mm）。本文介绍了使用空间分辨率很高的红外热像仪（像素大小约为0.1 mm）对未对准的PFU边缘进行的首次温度分析，并显示了根据这些测量得出的平行热通量获得的一致性。由于VHR摄像机的温度检测阈值很高（T阈值，BB≈370°C），因此分析着重于PFU前沿未对准的最热区域。通过将前缘附近的环形温度曲线与3D有限元建模进行匹配，可以评估与磁场线平行的热通量。本研究假设的钨发射率是0.6，这是一致的。