中文摘要：

为了诊断惯性约束聚变的聚爆靶的尺寸、形状、分布和均匀性等情况，利用X射线布拉格衍射理论，搭建了基于球面弯曲晶体的X射线背光成像系统。其核心元件是α-石英球面弯晶，α-石英晶体性质稳定，结构完整，反射率和分辨率高。弯曲晶体尺寸为65mm×20mm，弯曲半径为143．3mm。利用该背光成像系统进行了单色X射线背光成像实验。成像物体为3×3阵列的正方形不锈钢网格，利用接收装置磷屏成像板，得到清晰的crKaX射线背光源二维空间分辨，在9．6mm×28．7mm的视场范围内，其像的空间分辨率大约为83．3μm。实验结果表明α-石英球面弯曲晶体适合于X射线的背光诊断研究。

英文摘要：

In order to diagnose the distribution, stability, dimensions and plasma uniformity of pellet implosion in the inertial confinement fusion （ICF）, an X-ray backlight imaging system based on spherically bent crystal has been set up using the X-ray Bragg diffraction theory. The primary component of the imaging system is the spherically bent α-quartz crystal which has characteristics of stability, complete structure, high reflectivity and resolution. The crystal dimension is 65 mm× 20 mm and the curvature radius is 143.3 mm. Monochromatic X-ray backlight imaging experiment using the imaging system has been carried out. In the experiment, the object is a 3 × 3 array square stainless steel grid. It obtains two-dimensional monochromatic X-ray backlight image of chrome in imaging plane. The X-ray backlight imaging system based on spherically bent crystal provides an approximate 83. 3 μm spatial resolution and a 9.6 mm × 28.7 mm field of views. It is demonstrated that this backlight imaging system could be used for monochromatic X-ray backlighting imaging diagnosis.