Taking the advantage of high energy and low emittance of HEPS, and taking the cutting-edge research and national needs into consideration, we adopted dedicated designs to construct the hard X-ray imaging beamline.The hard x-ray imaging beamline have several advantages, such as high sensitivity, strong penetration, multi-scale resolution, large field of view, multi-contrast mechanism integration and various in situ environment compatibility. The main experimental method is SRX in-line phase contrast imaging and diffraction contrast imaging.
Two ID sources, one CPMU and one wiggle, provide a wide spectral range of 10-300 keV. The high energy x-ray is characterized with strong penetration (For example, the penetration rate to Ni with 20mm thickness is over 10%.). The the longest distance from the sample to the source is greater than 340m. This design can guarantee that the point spread function (PSF) of the source is very small for the sample, while also ensuring that the spot area at the sample is large enough. The high energy x-ray also has excellent spatial coherence. The size of the light spot at horizontal direction could vary from 0.1mm to 300mm. The ratio of the field of view and resolution is far better than that of the current similar stations. Above all, the station is excellent in large field of view and high spatial resolution; strong penetration and high sensitivity, etc.
Three wide bandwidth monochromators with high stability is designed, including filter system, composite refractive lens and Laue double crystal monochromator. The station could provide multi-scale beam spot with high stability, high penetration, high uniformity, high coherence and wide spectrum range. A series of high performance hard X-ray imaging detectors are designed and developed, including high resolution high MTF detector, high pixel number high dynamic range high resolution detector, high energy high efficiency high resolution detector and so on. The design of the end station enables in-situ real-time imaging research by using a variety of imaging methods. The station is also equipped with advanced software and hardware systems for the management, reconstruction and analysis of massive data.