Affiliations: Beijing Synchrotron Radiation Facility, Institute of
High Energy Physics,Chinese Academy of Sciences, Beijing, China | Department of Chemistry, Xingtai College, Xingtai,
Hebei, China
Note: [] Correspondence author: Ziyu Wu, Professor, Beijing Synchrotron
Radiation Facility, Institute of High Energy Physics, Chinese Academy of
Sciences, P.O. Box 918, Beijing 100049, China. Tel.: +86 10 8823 5996; Fax: +86
10 8823 3156; E-mail: wuzy@ihep.ac.cn
Abstract: Using the three slit collimation system with a divergent beam
simplifies the design of a small angle X-ray scattering (SAXS) cameras and
improves both flux and stability. To achieve the required low angle and a high
spatial resolution, the collimation system must be optimized in the design and
operation phases. Simulation of a slit divergent camera yields optimal distance
between the beam defining slits and optimal distance between sample and
detector at which the maximum SAXS resolution is achieved with a minimal
parasitic scattering for any length of the SAXS camera. The narrower the beam
defining slits and the longer the total camera length, the smaller the minimum
resolvable angle and the higher the attainable resolution.
Keywords: SAXS resolution, three slits collimation system, divergent beam
