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

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.

Source: Journal of Synchrotron Radiation - August 10, 2017 Category: Physics Authors: Chen, G. Chu, S. Sun, T. Sun, X. Zheng, L. An, P. Zhu, J. Wu, S. Du, Y. Zhang, J. Tags: confocal XAS mobile endstation sacrificial red glaze depth-dependent valence distribution research papers Source Type: research