Coherent and Small Angle Soft X-ray Scattering

• Main Authors: Hung, Te-Cheng, 洪德晟
• Other Authors: Huang, Di-Jing
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/84050303933166894731

碩士 === 國立交通大學 === 工學院加速器光源科技與應用碩士學位學程 === 101 === Small angle X-ray scattering provides high penetration and non-destructive way to detect the microstructure, particle size and particle shape of material. With the X-ray absorption energy of a particular atom, we can distinguish the contribution from different elements. With the small angle soft X-ray scattering technique, we fixed incident angle at 0.75 ° and 0.5 °, and changed different photon energies. We found that near the Mn absorption energy, the scattering intensity is high for the Q value being 0.028 Å^(-1). With the slope of the large Q region, we suggest that the shape of Mn, Cd-metallothionein-2 is elliptical. In the past, we only can get the amplitude of scattered light from the interaction of light and matter. However we cannot get the more important information–phase. With a coherent light source, we can retrieve the phase information. Discover the complete picture of material. Using a monochromator and a pinhole, we generated a coherent light source and set up a simple experimental end station for coherent scattering. The coherent light source of high intensity and low divergence. We observed a diffraction pattern from a circular aperture, and the diffraction fringes changed with different photon energies. In comparison with the theoretic calculations, the experimental result has an error less than 20%.