Evaluation of a modern soft x-ray monochromator with high resolving power over 10,000

摘要

A new soft x-ray monochromator with varied-line-spacing plane gratings has been installed in SPring-8. The energy resolution of the monochromator is estimated by the photoabsorption spectra of the Ne 1s excitation and by the photoelectron spectra of Xe 5p at the same photon energy of 867 eV. The highest possible resolving power of the monochromator is over 15,000 at 867 eV.