title: The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering.
abstract: Resonant Inelastic X-ray Scattering (RIXS) in the soft x-ray range is an element-specific energy-loss spectroscopy used to probe the electronic and magnetic excitations in strongly correlated solids. In the recent years, RIXS has been progressing very quickly in terms of energy resolution and understanding of the experimental results, but the interpretation of spectra could further improve, sometimes decisively, from a full knowledge of the polarization of incident and scattered photons. Here we present the first implementation, in a high resolution soft-RIXS spectrometer used to analyze the scattered radiation, of a device allowing the measurement of the degree of linear polarization. The system, based on a graded W/B4C multilayer mirror installed in proximity of the CCD detector, has been installed on the AXES spectrometer at the ESRF (European Synchrotron Radiation Facility); it has been fully characterized and it has been used for a demonstration experiment at the Cu L3 edge on a high-Tc superconducting cuprate. The loss in efficiency suffered by the spectrometer equipped with this test facility was a factor 17.5. We propose also a more advanced version, suitable for a routine use on the next generation of RIXS spectrometers and with an overall efficiency up to 10%.
authors.affiliation: CNR-SPIN and Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo Da Vinci 32, Milano I-20133, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Braicovich
authors.affiliation: CNR-SPIN and Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo Da Vinci 32, Milano I-20133, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Minola
authors.affiliation: CNR-SPIN and Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo Da Vinci 32, Milano I-20133, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Dellea
authors.affiliation: Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Le Tacon
authors.affiliation: European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble F-38043, France.
authors.forename: M
authors.initials: M
authors.lastname: Moretti Sala
authors.affiliation: European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble F-38043, France.
authors.forename: C
authors.initials: C
authors.lastname: Morawe
authors.affiliation: European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble F-38043, France.
authors.forename: J-Ch
authors.initials: JC
authors.lastname: Peffen
authors.affiliation: Synchrotron Light Research Institute, Nakhon Ratchasima, Thailand.
authors.forename: R
authors.initials: R
authors.lastname: Supruangnet
authors.affiliation: European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble F-38043, France.
authors.forename: F
authors.initials: F
authors.lastname: Yakhou
authors.affiliation: CNR-SPIN and Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo Da Vinci 32, Milano I-20133, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Ghiringhelli
authors.affiliation: European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble F-38043, France.
authors.forename: N B
authors.initials: NB
authors.lastname: Brookes