Open AccessA confocal set‐up for micro‐XRF and XAFS experiments using diamond‐anvil cells
Author(s) -
Wilke Max,
Appel Karen,
Vincze Laszlo,
Schmidt Christian,
Borchert Manuela,
Pascarelli Sakura
Publication year - 2010
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049510023654
Subject(s) - x ray absorption fine structure , diamond , fluorescence , optics , synchrotron radiation , materials science , confocal , synchrotron , diamond anvil cell , beam (structure) , detector , lens (geology) , chemistry , analytical chemistry (journal) , diffraction , physics , spectroscopy , quantum mechanics , composite material , chromatography
A confocal set‐up is presented that improves micro‐XRF and XAFS experiments with high‐pressure diamond‐anvil cells (DACs). In this experiment a probing volume is defined by the focus of the incoming synchrotron radiation beam and that of a polycapillary X‐ray half‐lens with a very long working distance, which is placed in front of the fluorescence detector. This set‐up enhances the quality of the fluorescence and XAFS spectra, and thus the sensitivity for detecting elements at low concentrations. It efficiently suppresses signal from outside the sample chamber, which stems from elastic and inelastic scattering of the incoming beam by the diamond anvils as well as from excitation of fluorescence from the body of the DAC.