The Time-resolved and Extreme-conditions XAS (TEXAS) facility at the European Synchrotron Radiation Facility: the energy-dispersive X-ray absorption spectroscopy beamline ID24

Abstract

The European Synchrotron Radiation Facility has recently made available to the user community a facility totally dedicated to Time-resolved and Extremeconditions X-ray Absorption Spectroscopy -TEXAS. Based on an upgrade of the former energy-dispersive XAS beamline ID24, it provides a unique experimental tool combining unprecedented brilliance (up to 10 14 photons s À1 on a 4 mm  4 mm FWHM spot) and detection speed for a full EXAFS spectrum (100 ps per spectrum). The science mission includes studies of processes down to the nanosecond timescale, and investigations of matter at extreme pressure (500 GPa), temperature (10000 K) and magnetic field (30 T). The core activities of the beamline are centered on new experiments dedicated to the investigation of extreme states of matter that can be maintained only for very short periods of time. Here the infrastructure, optical scheme, detection systems and sample environments used to enable the mission-critical performance are described, and examples of first results on the investigation of the electronic and local structure in melts at pressure and temperature conditions relevant to the Earth's interior and in laser-shocked matter are given.

Magnetism of Ir5+ -based double perovskites: Unraveling its nature and the influence of structure

“…The extended x-ray absorption fine structure (EXAFS) spectra at the Ir L 3 absorption edge were recorded at ambient pressure and room temperature (RT) as well as under applied high pressures (from 2.5 GPa up to 43 GPa) and low temperature (T = 10 K) at the BM23 [30] and ID24 [31] beamlines of the ESRF (Grenoble, France), respectively. In the first case the incoming energy was selected by using a Si (111) double-crystal monochromator, and higher-order harmonics were rejected by a Si mirror set at 2.2 mrad.…”

Simultaneous Observation of the Er- and Fe-Sublattice Magnetization of FerrimagneticEr3Fe5O12Strohm1, Linden2, Mathon3 et al. 2019Phys. Rev. Lett.Self Cite142210View full textAdd to dashboardCite

“…Transmission experiments at the Er L 2;3 edges were performed at the energy dispersive x-ray absorption spectroscopy beam line ID24 at the European Synchrotron Radiation Facility [18]. X rays were circularly polarized using a diamond quarter wave plate in a quasinondispersive setting with the polychromator [19].…”

“…The acquisition of full energy spectra at different field values is key for the subsequent analysis using SVD. In the present pulsed field experiments, this was achieved through use of a multiframe detection scheme [21] at the energy dispersive beam line ID24 [18]. The sample was oriented along the 100 direction, cut, polished, and sandwiched as a freestanding platelet between two Si substrates with holes of 500 μm for the x-ray beam.…”

Local structure and spin transition inFe2O3hematite at high pressure

“…However, many difficulties are associated with conducting EXAFS studies at high-pressure, due to the strong absorption of the diamond anvils at low x-ray energies (the Fe K-edge is at 7.1 KeV), and due to intrinsic limitations to the measurable k-range for EXAFS because of Bragg diffraction from the diamonds. In this study, Fe K-edge energy dispersive EXAFS measurements have been conducted on Fe 2 O 3 under pressures up to ∼79 GPa (and then decompressing up to ∼19 GPa) at the ID24 XAS beamline of the European Synchrotron Radiation Facility (ESRF) in Grenoble [23]. The recent developments on this beamline, together with the availability of nanodiamond anvils [24], offer the possibility to reach a larger k-range (up to about 10Å −1 in the present study) at very high pressures [25,26].…”