Microfocus small-angle X-ray scattering at SSRF BL16B1

TL;DR

This paper describes the development and application of microfocus small-angle X-ray scattering at SSRF BL16B1, including a new desmearing technique and a tomography experiment on bamboo samples, enabling detailed microstructural analysis.

Contribution

The paper introduces a microfocus-SAXS setup with a KB mirror system, a blind deconvolution-based desmearing procedure, and demonstrates SAXS-CT imaging on bamboo samples.

Findings

Achieved a SAXS minimum q value of 0.1 nm^-1 with high photon flux.

Developed an effective desmearing method for 2D SAXS patterns.

Successfully performed SAXS-CT imaging on bamboo samples.

Abstract

Offering high-brilliance X-ray beams on micrometer length scales, the microfocus-SAXS at SSRF BL16B1 was established with a KB mirror system for studying small sample volumes, or probing micro-scopic morphologies. The SAXS minimum q value was 0.1nm-1 with a flux of 1.5 * 10^10 photons/s. Two position-resolved scanning experimental methods were combined with microfocus-SAXS that include STXM and CT. To improve the significant smearing effect in the horizontal direction, an effective and easy-to-use desmearing procedure for two-dimensional SAXS pattern based on the blind deconvolution was developed and the deblurring results demonstrated the good restoration effect for the defocus image. Finally, a bamboo sample was selected for SAXS-CT experiment which illustrated the performance of the microfocus-SAXS method.