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介绍了基于球面弯晶的X射线高分辨单色背光成像技术。通过对球面弯晶背光成像系统的分析,获得成像关键性能参数随成像系统设计参数变化的关系,设计了应用于神光Ⅱ激光装置的单色背光成像系统。利用石英球面弯晶,采用Mg的类H共振发射线以及利用云母球面弯晶,采用Mo连续谱中3.14keV能点进行背光实验,获得了内爆靶丸的单色投影图像,空间分辨在较大范围内好于5μm。这种成像技术在现阶段惯性约束聚变(ICF)实验研究中能够发挥许多重要的作用,特别是对内爆靶丸压缩流线的测量和流体力学不稳定性的诊断。
X-ray high-resolution monochrome backlight imaging based on spherical crystal is introduced. Through the analysis of the spherical curved backlit imaging system, the relationship between the key performance parameters of the imaging system and the design parameters of the imaging system was obtained. A monochrome backlight imaging system was designed and applied to the SG Ⅱ laser system. Using quartz spherical crystal, Mg-like H-like resonance emission line and the use of mica spherical bent crystal, the 3.14keV energy point in the Mo continuum spectrum was used to carry out the backlight experiment. The monochromatic projection images of the implosion target were obtained. Large range better than 5μm. This imaging technique can play many important roles in the current research on inertial confinement fusion (ICF) experiments, especially for the measurement of compressed streamlines of implosion target pellets and the diagnosis of hydrodynamic instabilities.