BL13W, an X-ray imaging beamline has been built and opened to users since May 6, 2009. More than 70 user proposals
per year are granted and implemented at the beamline, with about 500 user visits/year. Up to now, X-ray
microtomography (XMCT) is the dominated method for BL13W user operation, more than 70% user experiments were
carried out with XMCT, covering the research fields in material science, biomedicine, physics, environmental science,
archaeology and paleontology. To meet the user requirements, micro-CT imaging methods based on a variety of contrast
mechanisms, including absorption, phase contrast, X-ray fluorescence, have been developed. Algorithms and related
software have been developed achieve the low dose and fast data collection. Quantitative analysis to the three
dimensional CT images is highly emphasized and related software for 3D information extraction with high precision and
high efficiency, has been developed. Three-dimensional structure evolution has been attracting more and more attention
in many scientific research fields. Two-Hertz dynamic phase contrast CT based on monochromatic SR beam was
established at SSRF. The limitation of fluorescence X-ray CT from practical applications is the data-collection
efficiency. The ordered-subsets expectation maximization algorithm was inducted to improve practicability of X-ray
fluorescence computed tomography (XFCT), greatly. A scheme for full field XFCT was also proposed.
Full field X-ray nano-imaging focusing on material science is under
developing at SSRF. A dedicated full field X-ray nano-imaging beamline based on bending
magnet will be built in the SSRF phase-II project. The beamline aims at the 3D imaging of
the nano-scale inner structures. The photon energy range is of 5-14keV. The design goals
with the field of view (FOV) of 20μm and a spatial resolution of 20nm are proposed at 8 keV,
taking a Fresnel zone plate (FZP) with outermost zone width of 25 nm. Futhermore, an
X-ray nano-imaging microscope is under developing at the SSRF BL13W beamline, in which
a larger FOV will be emphasized. This microscope is based on a beam shaper and a zone
plate using both absorption contrast and Zernike phase contrast, with the optimized energy set
to 10keV. The detailed design and the progress of the project will be introduced.
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