The five-analyzer point-to-point scanning crystal spectrometer at ESRF ID26

Abstract

X-ray emission spectroscopy in a point-to-point focusing geometry using instruments that employ more than one analyzer crystal poses challenges with respect to mechanical design and performance. This work discusses various options for positioning the components and provides the formulas for calculating their relative placement. Ray-tracing calculations were used to determine the geometrical contributions to the energy broadening including the source volume as given by the beam footprint on the sample. The alignment of the instrument is described and examples are given for the performance.

Stabilization of intermediate spin states in mixed-valent diiron dichalcogenide complexes

“…The Fe Kβ X-ray emission spectra of complexes 1 and 2 were measured at separate synchrotron beamlines (SOLEIL GALAXIES for 1 and the European Synchrotron Radiation Facility (ESRF) ID-26 for 2 ), whereas complex 3 was measured on the in-house LabXES spectrometer 60 , which has approximately twofold lower resolving power than the synchrotron spectrometers ( E /Δ E ≈ 3,900 at 7.06 keV for LabXES 60 compared with 8,800 at ID26; ref. 61 ). The X-ray emission spectrum for complex 1 has been previously reported 27 .…”

High-energy resolution X-ray spectroscopy at actinide M4,5 and ligand K edges: what we know, what we want to know, and what we can know

“…The existence of various geometries provides an opportunity to use the most appropriate instrument for the particular experimental station. In cases of the Johann and Johannson geometries, a point-to-point focusing scheme is realized, where both the crystal analyzer and the detector are moved when the emitted energy is scanned [40][41][42][43][44][45][46][47] . This scheme provides a higher detection signal, better energy resolution and covers a larger solid angle.…”

Probing the Local Coordination of Hexavalent Uranium and the Splitting of 5f Orbitals Induced by Chemical Bonding

“…M 4 edge HERFD XANES spectra were collected at the beamline ID26 of the European Synchrotron Radiation Facility (ESRF). 26 The incident beam energy was selected by a Si(111) double crystal monochromator. Rejection of higher harmonics was achieved by three Si mirrors at an angle of 3.5 mrad relative to the incident beam.…”