Gu, Yue-Liang; Zheng, Xu; Zhang, Xing-Min; Zhao, Bin; Yin, Guang-Zhi; Zhu, Da-Ming; Sun, Yuan-He; Gao, Xing-Yu; Li, Xiao-Long

NUCLEAR SCIENCE AND TECHNIQUES

2024, 35, 2210-3147

Gu, Yue-Liang; Zheng, Xu; Zhang, Xing-Min; Zhao, Bin; Yin, Guang-Zhi; Zhu, Da-Ming; Sun, Yuan-He; Gao, Xing-Yu; Li, Xiao-Long

BL02U2 of the Shanghai Synchrotron Radiation Facility is a surface diffraction beamline with a photon flux of 5.5 x 1012 photons/s at 10 keV and a beam size of 160 mu m x 80 mu m at the sample site. It is dedicated to studying surfaces (solid-vacuum, solid-gas) and interfaces (solid-solid, solid-liquid, and liquid-liquid) in nanoscience, condensed matter, and soft matter systems using various surface scattering techniques over an energy range of 4.8-28 keV with transmission and reflection modes. Moreover, BL02U2 has a high energy resolution, high angular resolution, and low beam divergence, which can provide excellent properties for X-ray diffraction experiments, such as grazing incident X-ray diffraction, X-ray reflectivity, crystal truncation rods, and liquid X-ray scattering. Diversity of in situ environments can also be provided for the samples studied. This paper describes the setup of the new beamline and its applications in various fields.