Polarization analysis in the 3–25 keV range at the ESRF magnetic scattering beamline

The ESRF magnetic scattering beamline has been optimized for easy tunability of the polarization and energy in the 3–40 keV range. The linear horizontal polarization from the undulator reaches 99.9%, with a flux of ∼10¹² photons s⁻¹ at the sample. The diffractometer can operate in horizontal and vertical geometries, with an energy or polarization analyser. The capabilities of this beamline in terms of flux, energy tunability and polarization, permitted polarization analysis of resonant magnetic scattering from antiferromagnetic UPd₂Si₂ at both the L₂- and M₄-edges of uranium, to separate the contributions of the 5f and 6d electrons to the magnetism.