级联式平面抛物面型X射线组合折射透镜的设计与制作
付明磊;乐孜纯;周寒青;张明;全必胜;王华;毛成文;王昌辉;沈小燕
【期刊名称】《物理学报》 【年(卷),期】2014(000)019
【摘要】Due to its attractive features such as compact size, simple to align and wide working range of photon energy, the X-ray compound refractive lens (CRL) has gradually become one of the standard accessories to focus the X-ray beams from the synchrotron radiation light source. In this paper, a cascaded planar parabolic CRL is designed and fabricated. The novel CRL is composed of type I and type II refractive elements in order to achieve a small spot size while maintaining the transmission. In type I refractive element, the parabolic geometry aperture (R0) is large, while, in type II refractive element, the radius of curvature (R) at the parabolic vertex is small. So N1 numbers of type I and N2 numbers of type II refractive elements are cascaded to form a single-chip CRL. A cascaded X-ray planar parabolic CRL is constructed using PMMA material by means of LIGA techniques. The main structural parameters of type I refractive elements are:N1 =15, R1 =200 μm, 2R01 =564 μm. The main structural parameters of type II refractive elements are: N2 =20, R2 = 50 μm, 2R02 = 140 μm. The cascaded planar parabolic CRL is tested on the beam line whose original incident X-ray spot is 200 μm × 100 μm at Shanghai synchrotron
级联式平面抛物面型X射线组合折射透镜的设计与制作
