【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65 mm×20 mm，弯曲半径为143.3 mm。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Cr Kα X射线背光源二维空间分辨，在9.6 mm×28.7 mm的视场范围内，其像的空间分辨率大约为83.
【机 构】
：
重庆大学光电技术及系统教育部重点实验室，重庆400030中国工程物理研究院激光聚变研究中心，四川绵阳621900
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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65 mm×20 mm，弯曲半径为143.3 mm。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Cr Kα X射线背光源二维空间分辨，在9.6 mm×28.7 mm的视场范围内，其像的空间分辨率大约为83.3 μm。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。
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