高能闪光照相中钨球散射规律研究

Research on scatter law of tungsten sphere in high energy flash X-ray radiography

用解析法和Monte Carlo法研究了钨球闪光X光照相的散射照射量空间分布随钨球半径、系统中元件构成以及保护器件与记录平面间距的变化规律。指出散射照射量的空间分布是不均匀的,它随球半径增加而变大;保护器件是散射照射量的主要来源,增加从保护器件到记录平面的距离,可以降低散射分布不均匀性,以及有效地减少散射。

It is studied, with the analytic method and the Monte-Carlo numerical simulation for the flash X-ray radiography of the tungsten sphere, that the scattered exposure and its space distribution are influenced by the sphere radius, the configuration of cells in the sphere, and the distance between the back cone and the recording plane. The results show that the scattered component of exposure is not homogeneous in space and increase while the radius increases. Enlarge the distance from the back cone to the recording plane can mitigate this inhomogeneity. It can be confirmed that the back cone is the primary source of the scattered exposure, and that increasing the distance between the back cone and the recording plane can reduce the scattered exposure effectively.