Uncertainty evaluate of core symmetry which observed by Kirkpatrick-Baez microscope
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摘要: 具备高分辨能力（约5 μm）的Kirkpatrick-Baez（KB）显微镜大幅提升了芯部自发光诊断图像的空间分辨率，准确评估诊断不确定度有利于开展内爆对称性调谐，提高内爆性能。建立了针对KB显微镜的在线不确定度评估方法，详细分析了其在线背光照相实验中的图像分辨率和噪声，并对内爆物理实验中的芯部自发光数据进行了不确定度评估。结果显示，芯部自发光P2不确定度为6%，P4不对称性的不确定度为8%，满足了现阶段内爆物理实验的诊断需求。Abstract: The core emission was observed by Kirkpatrick-Baez (KB) microscope with about 5 μm space resolution. It is important to evaluate the uncertainty of core image thus to tune the implosion asymmetry. This article evaluates the spatial resolution and SNR of the backlight image got by KB microscope in the experiment, and calculates the uncertainty for the Legendre moments of core emission. The results show that the uncertainty of P2 is about 6% that of and P4 is about 8%.
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Key words:
- ICF /
- ignition asymmetry /
- Kirkpatrick-Baez microscope /
- uncertainty
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图 1 四通道KB显微镜背光成像结果及横向和纵向截面曲线
Figure 1. Backlight image got by KB microscope and x-axis and y-axis cross section of the image
图 2 模拟计算中采用的网格函数及分别得到的峰谷比与系统分辨率之间的关系
Figure 2. Grid images used in simulation and relation between resolution and k
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