Performance of the ESRF ID26 beamline reflective optics

Abstract

This paper presents the experimental results obtained during the commissioning of the X-ray mirrors installed on the ESRF beamline ID26. The ID26 spectrometer is dedicated to XAFS studies on ultra-diluted samples in the energy range 2.3 -25 KeV using the excitation of X-ray fluorescence. The beamiine has been open to external users since January 1998 and all the main optical elements are fully commissioned. The reflective optics layout consists of three devices: a high heat load deflecting mirror installed in the white beam section and a classical KirkpatrickBaez couple installed downstream the monochromator. The focusing mirrors are based on the multi-segmented piezoelectric mirror technology and allow for a continuos and very precise adjustment of the curvature. Spot sizes as small as 170 x 7 (hor. x vert) lam 2 FWHM can be easily achieved, with a total flux well in excess of 10 ]3 photons s l when using Si 220 monochromator crystals.

Sensitivity to Actinide Doping of Uranium Compounds by Resonant Inelastic X-ray Scattering at Uranium L3 Edge

“…25 The incident energy was selected using the ⟨3 1 1⟩ reflection from a double Si crystal monochromator. A rejection of higher harmonics was achieved by three Cr/Pd mirrors working under the total reflection.…”

Organic iron complexes enhance iron transport capacity along estuarine salinity gradients of Baltic estuaries

“…Fe K-edge high-energy-resolution fluorescence detection (HERFD) XANES spectra and Fe Kβ 2,5 emission spectra were collected at the high-brilliance X-ray absorption and X-ray emission spectroscopy undulator beamline ID26 of the European Synchrotron Radiation Facility (ESRF, Grenoble) (Signorato et al, 1999). The incident X-ray beam was monochromatized with a pair of cryogenically cooled Si(111) crystals.…”

“…This would suggest that high and rising concentrations of Fe from boreal rivers (Kritzberg and Ekström, 2012;Björnerås et al, 2017) may indeed result in increasing export of bioavailable Fe to the Baltic Sea and open waters, where it may limit N-fixation and primary production (Stal et al, 1999;Stolte et al, 2006;Martin and Fitzwater, 1988). Major hydrological events like spring floods and heavy storms have been observed to increase in the Fe concentration by up to a factor of 20 and alter the annual Fe load in northern rivers (Hölemann et al, 2005;Rember and Trefry, 2004;Dahlqvist et al, 2007;Herzog et al, 2019).…”

Comparison of Voltammetry Assisted by Multivariate Analysis with EXAFS as Applied to the Study of Cd- and Zn-Binding of Metallothionein Related Peptides

“…Photo-diodes are used for beam flux monitoring, for fluorescence radiation and for higher absorber concentrations. Additional information on physical characteristics of the ID26 beamline has been reported by Signorato et al [38].…”