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Title: Opportunities for Time Resolved Studies at the ID24 Energy Dispersive XAS Beamline of the ESRF

Abstract

ID24 is the energy dispersive beamline of the European Synchrotron Radiation Facility dedicated to X-ray Absorption Spectroscopy (XAS). Thanks to the parallel acquisition mode that allows data in a large energy range to be collected simultaneously, XAS using dispersive optics is particularly suited for the study of time dependent processes. The techniques that can be used to study such systems vary according to the timescale of the phenomena under investigation. They take advantage of the temporal structure of the synchrotron radiation in case of time resolution of the order of the intrinsic duration of the x-ray pulse (100 ps), while for time scales above 100 {mu}s or below 100 ps, the x-ray beam can be considered continuous and the time resolution is determined by the different detection systems.

Authors:
; ; ; ; ; ; ; ;  [1]
  1. European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex (France)
Publication Date:
OSTI Identifier:
21049249
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436289; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION SPECTROSCOPY; BEAM OPTICS; EUROPEAN SYNCHROTRON RADIATION FACILITY; PULSES; SYNCHROTRON RADIATION; TIME DEPENDENCE; TIME RESOLUTION; X RADIATION; X-RAY DETECTION; X-RAY SPECTRA; X-RAY SPECTROSCOPY

Citation Formats

Mathon, O., Aquilanti, G., Guilera, G., Labiche, J.-C., Linden, P. van der, Newton, M. A., Ponchut, C., Trapananti, A., and Pascarelli, S. Opportunities for Time Resolved Studies at the ID24 Energy Dispersive XAS Beamline of the ESRF. United States: N. p., 2007. Web. doi:10.1063/1.2436289.
Mathon, O., Aquilanti, G., Guilera, G., Labiche, J.-C., Linden, P. van der, Newton, M. A., Ponchut, C., Trapananti, A., & Pascarelli, S. Opportunities for Time Resolved Studies at the ID24 Energy Dispersive XAS Beamline of the ESRF. United States. doi:10.1063/1.2436289.
Mathon, O., Aquilanti, G., Guilera, G., Labiche, J.-C., Linden, P. van der, Newton, M. A., Ponchut, C., Trapananti, A., and Pascarelli, S. Fri . "Opportunities for Time Resolved Studies at the ID24 Energy Dispersive XAS Beamline of the ESRF". United States. doi:10.1063/1.2436289.
@article{osti_21049249,
title = {Opportunities for Time Resolved Studies at the ID24 Energy Dispersive XAS Beamline of the ESRF},
author = {Mathon, O. and Aquilanti, G. and Guilera, G. and Labiche, J.-C. and Linden, P. van der and Newton, M. A. and Ponchut, C. and Trapananti, A. and Pascarelli, S.},
abstractNote = {ID24 is the energy dispersive beamline of the European Synchrotron Radiation Facility dedicated to X-ray Absorption Spectroscopy (XAS). Thanks to the parallel acquisition mode that allows data in a large energy range to be collected simultaneously, XAS using dispersive optics is particularly suited for the study of time dependent processes. The techniques that can be used to study such systems vary according to the timescale of the phenomena under investigation. They take advantage of the temporal structure of the synchrotron radiation in case of time resolution of the order of the intrinsic duration of the x-ray pulse (100 ps), while for time scales above 100 {mu}s or below 100 ps, the x-ray beam can be considered continuous and the time resolution is determined by the different detection systems.},
doi = {10.1063/1.2436289},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • Pulsed magnetic fields constitute an attractive alternative to superconducting magnets for many x-ray techniques. The ESRF ID24 energy dispersive beamline was used for pulsed magnetic field room temperature XMCD measurements on GdCo3. The signal has been measured up to a magnetic field of 5.5 Tesla without signs of deterioration.
  • The configuration and performance of the time-resolved dispersive XAFS (DXAFS) instrument, which has been constructed at the NW2A beamline of PF-AR (KEK), are presented. The DXAFS instrument is mainly composed of a polychromator part, a position control part for sample, and a linear detector part. The Bragg- and Laue-type polychromator crystal (Si(111) or Si(311)) is bent using the holder with fixed bending radius, in which the thermostated water is circulated to prevent the temperature change of crystal due to the heat load. The photodiode array (PDA) with and without phosphor screen is used as the linear X-ray detector, and themore » minimum exposure time is 2 ms for the 1024-element PDA. The phosphor screen on the PDA detector prevents the damage of the chip especially for high energy X-rays but the existence reduces the energy resolution because of the scattering of the visible light converted on the phosphor. The DXAFS instrument was applied to the mechanistic study of the reduction processes of Cu supported on MFI zeolite, and the intermediate Cu(I) states have been successfully observed during the reduction from Cu(II) to Cu(0)« less
  • This report discusses the use of N{sub 2}O method to determine the surface area of copper catalyst. Extreme x-ray absorption fluorescence spectroscopy is used to show that average particle diameter of Copper on silicon oxide is less than 25 {Angstrom}.
  • The merits of employing the energy-dispersive mode for recording the dynamics of the structural changes accompanying the thermal activation of an as-prepared catalyst are illustrated by a time-resolved investigation of the dehydration of an Ni{sup 2+}-exchanged Na{sup +} zeolite Y catalyst (see Couves, Jones, Thomas, and Smith, Adv. Mater. 1990, 2, 181). EXAFS data for a model metallic nickel catalyst, collected in 500 ms, are also shown. These yield quantitatively reliable structural information, thus demonstrating the feasibility of conducting routine, dynamic studies of heterogeneous catalysts and a variety of other material under operating conditions.