Journal Article 3 energy resolution 2 Research Support, Non-U.S. Gov't 1 confined-walking mode 1 elliptical polarization undulator 1 elliptical polarized undulators 1 fast polarization switching 1 plus ... free-walking mode 1 magnet array gaps 1 magnet array shifts 1 photon flux 1 reduced set of key nodes 1 soft X-ray magnetic circular dichroism beamline 1 tandem twin elliptically polarized undulators 1 variable-line-space plane grating 1 moins ...