Optimal focusing system of the Fresnel zone plates at the Synchrotron SOLEIL NanoARPES beamline

Abstract

ANTARES beamline (BL), operating at very low photon energies, is a new soft X-ray scanning microscope recently built at SOLEIL Synchrotron, that offers a spectroscopic non-destructive nano-probe to study advanced materials. It combines a set of Fresnel Zone Plates (FZP) able to focalize the beam spot up to a few tenths of nanometres with a stable and precise sample nanopositioning (<1 nm). High energy-, angular- and spatial- resolution allow accurate electronic and chemical imaging combining angle-resolved photoelectron spectroscopy (NanoARPES or k-nanoscope) and core level detection by using both photoemission and X-ray absorption. Here, we report our latest results related to the optimization of the post-focusing mirrors system as well as its impact on the ultimate spatial resolution of the whole microscope.