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Instrumentation Developments for X-ray Linear and Circular Dichroism at the ESRF Beamline ID12A
J Goulon1, A Rogalev, C Gauthier
1European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France.
Abstract:
This paper reports on the performance of the instrumentation developed for the ESRF beamline ID12A, which is dedicated to spectroscopic applications requiring full control of the polarization at energies >/=2.0 keV. Emphasis is placed on the characterization of various optical components of the beamline and on problems associated with either the control or the conversion of the polarization state. A few examples have been selected to illustrate what sort of new spectroscopic information has already been obtained at the beamline. These include the comparison of X-ray magnetic dichroism spectra recorded with linear or circular polarization and the very first detection of X-ray natural circular dichroism in single crystals known to exhibit a very large non-linear susceptibility at optical wavelengths.
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