椭球单毛细管高能X射线微焦斑透镜模拟表征

To obtain high-energy X-ray micro-focal size for monocapillary X-ray lens in X-ray micro-area analysis, a high-energy X-ray micro-focal spot lens based on ellipsoidal monocapillary was designed and simulated．The inner surface of lens coated with metal oxide film was simulated, the composition of which was HfO₂．Simulations showed that both coated and ordinary glass lens could focus X-rays at 100 keV into a focal size below 10 microns．Compared with ordinary glass lenses, the upper limit of X-ray focusing energy was increased 2-fold after coating the lens．To improve input flux, the coated lens was redesigned．Compared with glass lens, newly coated lens showed a 3.8-fold increase in luminous flux at the focal size at 100 keV, the power density gain increased by an order of magnitude, indicating that lens coating was valuable to focus high-energy X-rays．It is concluded that simulations could guide fabrication and application of ellipsoidal monocapillary high-energy X-ray lenses．      

大口径椭球型单管X射线聚焦镜设计与仿真

针对同步辐射光源点到样品距离长的特点,设计了镀膜与非镀膜这2种大口径椭球型单管X射线聚焦镜,并利用带有面型误差模型的仿真程序模拟了这2种大口径椭球型单管X射线聚焦镜的聚焦性能．结果表明:镀Ir膜的大口径椭球型单管X射线聚焦镜的入口直径、焦斑尺寸、焦深分别为19.0 mm、7.1 μm和0.2 mm,接收立体角约为未镀膜聚焦镜的3倍;未镀膜聚焦镜的入口直径和焦斑尺寸分别为15.0 mm和6.4 μm,焦深为镀Ir膜聚焦镜的4倍．分析了大口径椭球型单管X射线聚焦镜的面型误差对其焦斑尺寸的影响,讨论了大口径椭球型单管X射线聚焦镜的应用前景．