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为了实现对薄膜和镀层材料厚度的微区无损分析,利用多毛细管X光会聚透镜和多毛细管X光平行束透镜设计并搭建了普通实验室X射线光源的共聚焦微束X射线荧光测厚仪,对该共聚焦测厚仪的性能进行了系统表征。利用该测厚仪测定了厚度约为25μm的Ni独立薄膜样品和压于硅基表面厚度约为15μm的Ni薄膜样品厚度,对应它们的相对测量误差分别为3.7%和6.7%。另外,还对厚度约为10μm Ni薄膜样品的厚度均匀性进行了测量。该共聚焦测厚仪可以对样品进行微区深度分析,并且具有元素分辨能力,从而使得该谱仪可以测量多层膜样品不同层的膜厚,在薄膜和镀层厚度表征领域具有潜在的应用。 相似文献
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The inner surface roughness of a capillary is investigated by the reflectivity of x-rays penetrating through the capillary. The results are consistent with the data from atomic force microscope (AFM). The roughness measured by this new method can reach the order of angstroms with high quality capillaries. 相似文献
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This paper develops a simulation program for x-ray transmission in an ellipsoidal capillary based on a ray-tracing method.The influence of the parameters of ellipsoidal capillary and x-ray energy on transmission efficiency,full width at half maximum and power density gain of x-ray beams through an ellipsoidal capillary was analysed by this program.It shows that the particular rules of the ellipsoidal capillary x-ray lens are different from the polycapillary lens.Furthermore,this analysis method can be applied to the optimized design of ellipsoidal capillary. 相似文献
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A new type of x-ray lens composed of multi-square polycapillary slices(ASPXRL)used in focusing parallel x-ray beam was presented in this paper.Compared with conventional x-ray polycapillary lens,ASPXRL can provide smaller and brighter focus.The effects of the manufacturing imperfections on focusing quality of ASPXRL were evaluated with the values of transmission efficiency and discussed.It is suggested that ASPXRL has application prospects as a condenser lens for x-ray microscopy and flux collectors for x-ray analytical instruments. 相似文献
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头发中的元素与人的饮食和健康状况有关,对头发中元素的分析,不仅可用于刑事物证鉴别,还可为疾病的预防和治疗提供依据,因此,如何检测头发中元素分布等信息倍受人们关注。本文利用基于毛细管X光透镜和实验室普通X射线光源的共聚焦微束X射线荧光技术对单根头进行了无损扫描分析,分析了单根头发中元素的空间分布。在该毛细管X光透镜共聚焦微束X射线荧光技术中,毛细管X光会聚透镜的出口焦斑和毛细管X光平行束透镜的入口焦斑处在共聚焦状态,从而形成共聚焦微元,探测器只能探测到来自该共聚焦微元中的X射线信号,降低了背底信号对X射线荧光谱的影响,从而有利于提高该共聚焦X射线荧光技术的分析精度。该共聚焦技术中采用了具有高功率密度增益的毛细管X光会聚透镜,降低了该共聚焦X射线荧光技术对X射线光源功率的要求,从而保证了该共聚焦技术可以采用实验室普通X射线光源,降低了实验成本。实验表明,毛细管X光透镜共聚焦微束X射线荧光技术在单根头发元素分布检测中具有应用价值。 相似文献