Fig. 1. Structure of the hard X-ray FZP. (a) Schematic diagram of the PZP structure; (b) SEM image

Fig. 2. Variation curves of the diffraction efficiencies of different combination FZP with thickness. (a) Energy of the light source is 8 keV; (b) energy of the light source is 15 keV

Fig. 3. Relationship between maximum diffraction efficiency, optimal thickness and source energy

Fig. 4. Optimal thicknesses and fluctuation ranges of the FZP under different source energy