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Confocal depth‐resolved fluorescence micro‐X‐ray absorption spectroscopy for the study of cultural heritage materials: a new mobile endstation at the Beijing Synchrotron Radiation Facility |
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| Authors: | Guang Chen Shengqi Chu Tianxi Sun Xuepeng Sun Lirong Zheng Pengfei An Jian Zhu Shurong Wu Yonghua Du Jing Zhang |
| Affiliation: | 1. Institute of Health Sciences, Anhui University, Hefei230601, People's Republic of China;2. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, People's Republic of China;3. College of Nuclear Science and Technology, Beijing Normal University, Beijing100975, People's Republic of China;4. Department of Scientific History and Archaeometry, University of Chinese Academy of Sciences, Beijing100949, People's Republic of China;5. Jingdezhen Ceramics Institute of Archaeology, Jingdezhen333001, People's Republic of China;6. Heterogeneous Catalysis, Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research, 1 Pesek Road, Jurong Island627833, Singapore |
| Abstract: | A confocal fluorescence endstation for depth‐resolved micro‐X‐ray absorption spectroscopy is described. A polycapillary half‐lens defines the incident beam path and a second polycapillary half‐lens at 90° defines the probe sample volume. An automatic alignment program based on an evolutionary algorithm is employed to make the alignment procedure efficient. This depth‐resolved system was examined on a general X‐ray absorption spectroscopy (XAS) beamline at the Beijing Synchrotron Radiation Facility. Sacrificial red glaze (AD 1368–1644) china was studied to show the capability of the instrument. As a mobile endstation to be applied on multiple beamlines, the confocal system can improve the function and flexibility of general XAS beamlines, and extend their capabilities to a wider user community. |
| Keywords: | confocal XAS mobile endstation sacrificial red glaze depth‐dependent valence distribution |