title: Instrumentation Developments for X-ray Linear and Circular Dichroism at the ESRF Beamline ID12A.
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.
authors.affiliation: European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France.
authors.forename: J
authors.initials: J
authors.lastname: Goulon
authors.forename: A
authors.initials: A
authors.lastname: Rogalev
authors.forename: C
authors.initials: C
authors.lastname: Gauthier
authors.forename: C
authors.initials: C
authors.lastname: Goulon-Ginet
authors.forename: S
authors.initials: S
authors.lastname: Paste
authors.forename: R
authors.initials: R
authors.lastname: Signorato
authors.forename: C
authors.initials: C
authors.lastname: Neumann
authors.forename: L
authors.initials: L
authors.lastname: Varga
authors.forename: C
authors.initials: C
authors.lastname: Malgrange