X射线点投影技术在高能量密度物理相关实验中的应用
Applications of point-projection radiography to high energy density physics experiment
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摘要: 利用激光驱动4.8 keV左右的 Ti等离子体X射线源作为背光，通过静态成像实验研究了针孔辅助点投影诊断方法及其特点。进行了点投影技术动态诊断应用探索，建立了光子能量约4.8 keV、时间分辨力约100 ps、空间分辨约10 μm的动态诊断实验平台。并简要介绍了此诊断平台上开展的流体力学不稳定性研究、激光加速射流、材料预压缩特性研究等一系列实验结果。Abstract: The principles and characteristics of point-projection radiography were studied through static imaging experiments, using laser-driven about 4.8 keV Ti plasma X-ray source. The application of point-projection to dynamic diagnosis was then developed, and an experimental platform was accomplished with about 4.8 keV photon energy, about 100 ps time resolution and about 10 μm spatial resolution. A series of experimental results from this platform were introduced, including those on hydrodynamic instability, laser-accelerated plasma jet and compression characters of materials.
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Key words:
- high energy density physics /
- diagnostics /
- point x-ray source /
- radiography
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