Abstract Absolute extreme ultraviolet (AXUV) diode arrays are used to measure the plasma radiation for a wide spectral range in the fusion devices, providing valuable information about plasma radiated power and transport phenomena, especially during fast plasma events (such as plasma disruption and edge-localized mode). Design and optimization of the AXUV diode arrays are performed for the HL-2 M tokamak. 16-channel AXUV linear arrays are used as the diagnostic detectors, and a cooling system is designed to protect the detectors from high baking temperature. In order to meet the physical requirements, 176 lines of sight are designed within one toroidal section of the torus, and the geometrical arrangement of the arrays is optimized by coverage mapping and tomographic reconstruction test. Phantom simulation shows that the tomography methods can make reasonable reconstructions of the plasma emission profiles from the measurement of about 176 lines of sight. A 30 mm structure can be reproduced with 60 % accuracy. Therefore, the diagnostic will provide high spatially and temporally resolved plasma radiated power measurements in HL-2 M.

中文翻译：

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HL-2M 托卡马克 AXUV 二极管测量的初步设计

摘要 绝对极紫外 (AXUV) 二极管阵列用于测量聚变装置中宽光谱范围的等离子体辐射，提供有关等离子体辐射功率和传输现象的宝贵信息，尤其是在快速等离子体事件（例如等离子体破裂和边缘本地化模式）。为 HL-2 M 托卡马克执行 AXUV 二极管阵列的设计和优化。诊断探测器采用 16 通道 AXUV 线性阵列，并设计了冷却系统以保护探测器免受高温烘烤。为了满足物理要求，在环面的一个环形截面内设计了176条视线，并通过覆盖映射和断层重建测试优化了阵列的几何排列。体模模拟表明，断层扫描方法可以从大约 176 条视线的测量中合理地重建等离子体发射剖面。可以以 60% 的精度复制 30 毫米的结构。因此，诊断将在 HL-2 M 中提供高空间和时间分辨的等离子体辐射功率测量。