【摘要】 研究了柱腔靶中X光辐射能量传输。设计三种靶即源靶、输运靶(管靶)和缝靶进行分解研究,由源靶可得到输运的初始条件,由管靶得到输运的结果,由缝靶的测量可得到X光沿输运路径的衰减情况。运用简化的辐射输运模型,对三种分解靶的测量结果进行计算和分析。由实验和计算的结果推断X光在管靶中输运是指数衰减的,由数值计算结合实验结果得到辐射输运的定标公式。提出三种与辐射输运有关的自由程的概念,使得辐射输运的定标公式具有明确的物理意义。利用X光烧蚀的自相似解,得到等离子体对输运产生影响的定标公式。更多还原

【Abstract】 X-ray radiation transport in cylinder cavity targets is studied. For X-ray radiation energy transport, three kinds of targets, which are source, transport and slit targets, are investigated separately. From source target, the initial condition for transport is obtained. From transport target, the transport result is obtained. From slit target, the attenuation change along transport path is obtained. The simple radiation transport model is used to calculate and analyse the results for three kinds of targets. From experimental and calculated results, X-ray transport attenuation changes in exponential function, and scaling law for radiation transport is obtained. Three kinds of free path relative to transport are advanced. Using X-ray ablative self-similar solution, the scaling law for plasma expansion effect on transport is obtained.更多还原