SAMRAI: a novel variably polarized angle-resolved photoemission beamline in the VUV region at UVSOR-II

• Published in: Review of scientific instruments Vol. 81; no. 5; p. 053104
• Main Authors: Kimura, Shin-Ichi, Ito, Takahiro, Sakai, Masahiro, Nakamura, Eiken, Kondo, Naonori, Horigome, Toshio, Hayashi, Kenji, Hosaka, Masahito, Katoh, Masahiro, Goto, Tomohiro, Ejima, Takeo, Soda, Kazuo
• Format: Journal Article
• Language: English
• Published: United States 01.05.2010
• DOI: 10.1063/1.3425778

A novel variably polarized angle-resolved photoemission spectroscopy beamline in the vacuum-ultraviolet (VUV) region has been installed at the UVSOR-II 750 MeV synchrotron light source. The beamline is equipped with a 3 m long APPLE-II type undulator with horizontally/vertically linear and right/left circular polarizations, a 10 m Wadsworth type monochromator covering a photon energy range of 6-43 eV, and a 200 mm radius hemispherical photoelectron analyzer with an electron lens of a +/-18 degrees acceptance angle. Due to the low emittance of the UVSOR-II storage ring, the light source is regarded as an entrance slit, and the undulator light is directly led to a grating by two plane mirrors in the monochromator while maintaining a balance between high-energy resolution and high photon flux. The energy resolving power (hnu/Deltahnu) and photon flux of the monochromator are typically 1 x 10(4) and 10(12) photons/s, respectively, with a 100 microm exit slit. The beamline is used for angle-resolved photoemission spectroscopy with an energy resolution of a few meV covering the UV-to-VUV energy range.