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High-Throughput Powder Diffraction Using White X-Ray Beam and a Simulated energy-dispersive array detector

Engineering 2022年第3期8卷 81-88页

作者： Xiaoping Wang Weiwei Dong Peng Zhang Haoqi Tang Lanting Zhang Tieying Yang Peng Liu Hong Wang X.-D.Xiang Materials Genome Initiative Center&School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of High energy Physics Chinese Academy of SciencesBeijing 100049China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering&Department of Physics Southern University of Science and TechnologyShenzhen 518055China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China Guangdong Provincial Key Laboratory of energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055China Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055China

High-throughput powder X-ray diffraction(XRD)with white X-ray beam and an energy-dispersive detector array is demonstrated in this work on a CeO;powder sample on a bending magnet synchrotron beamline at the Shanghai Synchrotron Radiation Facility(SSRF),using a simulated energy-dispersive array detector consisting of a spatially scanning silicon-drift detector(SDD).Careful analysis and corrections are applied to account for various experimental hardware-related and diffraction angle-related *** resulting diffraction patterns show that the relative strength between different diffraction peaks from energy-dispersive XRD(EDXRD)spectra is consistent with that from angle-resolved XRD(ARXRD),which is necessary for analyzing crystal structures for unknown *** X-ray fluorescence(XRF)signal is collected *** counts from all pixels are integrated directly by energy,while the diffraction spectra are integrated by d-spacing,resulting in a much improved peak strength and signal-to-noise(S/N)ratio for the array *** comparison with ARXRD,the diffraction signal generated by a white X-ray beam over monochromic light under the experimental conditions is about 104 times *** full width at half maximum(FWHM)of the peaks in q-space is found to be dependent on the energy resolution of the detector,the angle span of the detector,and the diffraction *** is possible for EDXRD to achieve the same or even smaller FWHM as ARXRD under the energy resolution of the current detector if the experimental parameters are properly chosen.

关键词： High-throughput experiment White beam X-ray diffraction energy-dispersive array detector energy-dispersive X-ray diffraction Angle-resolved X-ray diffraction

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