半腔靶辐射场研究中M带X光角分布测量
Angular distribution measurement of M band Xray from the half hohlraum
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摘要: 在“神光Ⅱ”实验条件下，通过在半腔靶底部开大约200μm的小孔来模拟测量内爆靶丸附近的M带X光发射的角分布。介绍了实验中采用的诊断方法和实验方法，并给出了典型的实验结果。实验结果表明从半腔靶漏口所开200μm的小孔出射的M带X光不遵从cosθ分布。实验结果有助于对黑腔物理图像的理解，并为内爆实验设计提供实验依据。Abstract: Measurement of radiation field near a implosion pellet M band Xray is a important area in ICF research.On the “SGⅡ” laser facility, M band Xray from Au plasma was measured in half hohlraum radiation from a hole about 200μm at the end. The experiment setup and typical results were given. The results indicate that angular distribution of M band Xray from the hole at the end of half hohlraum doesn't assume linear relationship with the cosine of eradiating angle, but angular distribution of O band Xray from the half hohlraum entry does.The results are very useful for the research of implosion experiment and target design.
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