Construction of Two-dimensional Photoelectron Spectroscopy Beamline at Ritsumeikan SR Center for Investigation of Surface Electronic Structure.

We have reconstructed a vacuum ultraviolet beamline BL-7 for solid state and surface science covering a photon energy range of 10–160 eV. A set of four spherical grating are used which are designed to cover the energy range of 10–20 eV, 20–40 eV, 40–80 eV, and 80–160 eV, respectively. The lower limit of the photon energy was extended for the investigation of surface electronic structures which typically have a photoexcitation cross section maxima at 10–20 eV. The higher limit was extended for the access of many important core levels such as 2p of Si and 3s/3d of transition metals. The photon flux was evaluated by the photocurrent measurement. The energy range were greatly extended compared to that of the previous one. The spot size of the zeroth-order light at the sample surface was 1.25 mm (horizontal) × 0.32 mm (vertical). Furthermore, a newly designed display-type spherical mirror analyzer was installed at the end station. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]