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

2016 ◽  
Vol 23 (1) ◽  
pp. 353-368 ◽  
Author(s):  
S. Pascarelli ◽  
O. Mathon ◽  
T. Mairs ◽  
I. Kantor ◽  
G. Agostini ◽  
...  

The European Synchrotron Radiation Facility has recently made available to the user community a facility totally dedicated to Time-resolved and Extreme-conditions 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 1014 photons s−1on a 4 µm × 4 µm 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.

2005 ◽  
Vol 7 (2) ◽  
pp. 366-372 ◽  
Author(s):  
A. Rose ◽  
O. South ◽  
I. Harvey ◽  
S. Diaz-Moreno ◽  
J. R. Owen ◽  
...  

1990 ◽  
Vol 94 (17) ◽  
pp. 6517-6519 ◽  
Author(s):  
J. W. Couves ◽  
J. M. Thomas ◽  
C. R. A. Catlow ◽  
G. N. Greaves ◽  
G. Baker ◽  
...  

2003 ◽  
Vol 5 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Rachel O’Malley ◽  
Antje Vollmer ◽  
Jonathan R.I Lee ◽  
Ian Harvey ◽  
Jon Headspith ◽  
...  

2010 ◽  
Author(s):  
Olivier Mathon ◽  
Trevor Mairs ◽  
Sakura Pascarelli ◽  
R. Garrett ◽  
I. Gentle ◽  
...  

1998 ◽  
Vol 5 (5) ◽  
pp. 1250-1257 ◽  
Author(s):  
J. Pellicer-Porres ◽  
A. San Miguel ◽  
A. Fontaine

The design of a highly focusing profiled Si(111) Bragg crystal polychromator for dispersive EXAFS (extended X-ray absorption fine structure) experiments is described. The contour of the crystal has been optimized to give the best focus over the full 4–13 keV energy range. The profile optimization has been improved taking into account all the degrees of freedom of the geometry and the results of X-ray tracing simulations. The profile of the crystal has been calculated to take full advantage of the new possibilities given by the undulator source and the optics of beamline ID24 at the European Synchrotron Radiation Facility. Full spot sizes have been measured to be between 20 and 40 µm in the 5–12 keV energy range. These values compare well with X-ray tracing simulations and are the smallest spots ever obtained with energy-dispersive EXAFS optics, keeping, however, a wide enough energy bandpass for most X-ray absorption spectroscopy experiments.


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