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Title: BL5U at UVSOR-II for Three-dimensional Angle-resolved Photoemission Spectroscopy

Abstract

BL5U at UVSOR-II has been reconstructed in 2004's for three-dimensional angle-resolved photoemission (3D-ARPES) study on solids and surfaces. The beamline is equipped with a helically/linearly polarized undulator, an old-type monochromator named as SGM-TRAIN designed in 1995's, and a new photoemission end-station. Since their performances are insufficient to study anomalous electronic/magnetic properties on materials in recent years, we reconstructed the beamline for a high-resolution study as follows; (1) The manipulation of the pre-focusing mirror was updated to a high-precision system controlled by pulse-motors. (2) The entrance slit with water cooling system was adopted for avoiding the heat load from undulator radiation. (3) The SGM-TRAIN was re-arranged to the optimum condition to the undulator light. (4) The free tuning program of the undulator gap and monochromator-control systems was introduced. Due to the reconstructions, we successfully improved the throughput intensity and energy resolution of the beamline to be able to investigate three-dimensional electronic-structures using 3D-ARPES.

Authors:
;  [1];  [2];  [3]; ; ;  [1];  [4];  [5]
  1. UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585 (Japan)
  2. (Japan)
  3. School of Physical Sciences, Graduate University for Advanced Studies, Okazaki 444-8585 (Japan)
  4. Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603 (Japan)
  5. EcoTopia Science Institute, Nagoya University, Nagoya 464-8603 (Japan)
Publication Date:
OSTI Identifier:
21052583
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436129; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM PRODUCTION; CONTROL SYSTEMS; COOLING SYSTEMS; ELECTRONIC STRUCTURE; ENERGY RESOLUTION; HEATING LOAD; MAGNETIC PROPERTIES; MIRRORS; MONOCHROMATORS; PERFORMANCE; PHOTOELECTRON SPECTROSCOPY; PHOTOEMISSION; PHOTON BEAMS; THREE-DIMENSIONAL CALCULATIONS; WIGGLER MAGNETS

Citation Formats

Ito, Takahiro, Kimura, Shin-ichi, School of Physical Sciences, Graduate University for Advanced Studies, Okazaki 444-8585, Im, Hojun, Nakamura, Eiken, Sakai, Masahiro, Horigome, Toshio, Soda, Kazuo, and Takeuchi, Tsunehiro. BL5U at UVSOR-II for Three-dimensional Angle-resolved Photoemission Spectroscopy. United States: N. p., 2007. Web. doi:10.1063/1.2436129.
Ito, Takahiro, Kimura, Shin-ichi, School of Physical Sciences, Graduate University for Advanced Studies, Okazaki 444-8585, Im, Hojun, Nakamura, Eiken, Sakai, Masahiro, Horigome, Toshio, Soda, Kazuo, & Takeuchi, Tsunehiro. BL5U at UVSOR-II for Three-dimensional Angle-resolved Photoemission Spectroscopy. United States. doi:10.1063/1.2436129.
Ito, Takahiro, Kimura, Shin-ichi, School of Physical Sciences, Graduate University for Advanced Studies, Okazaki 444-8585, Im, Hojun, Nakamura, Eiken, Sakai, Masahiro, Horigome, Toshio, Soda, Kazuo, and Takeuchi, Tsunehiro. Fri . "BL5U at UVSOR-II for Three-dimensional Angle-resolved Photoemission Spectroscopy". United States. doi:10.1063/1.2436129.
@article{osti_21052583,
title = {BL5U at UVSOR-II for Three-dimensional Angle-resolved Photoemission Spectroscopy},
author = {Ito, Takahiro and Kimura, Shin-ichi and School of Physical Sciences, Graduate University for Advanced Studies, Okazaki 444-8585 and Im, Hojun and Nakamura, Eiken and Sakai, Masahiro and Horigome, Toshio and Soda, Kazuo and Takeuchi, Tsunehiro},
abstractNote = {BL5U at UVSOR-II has been reconstructed in 2004's for three-dimensional angle-resolved photoemission (3D-ARPES) study on solids and surfaces. The beamline is equipped with a helically/linearly polarized undulator, an old-type monochromator named as SGM-TRAIN designed in 1995's, and a new photoemission end-station. Since their performances are insufficient to study anomalous electronic/magnetic properties on materials in recent years, we reconstructed the beamline for a high-resolution study as follows; (1) The manipulation of the pre-focusing mirror was updated to a high-precision system controlled by pulse-motors. (2) The entrance slit with water cooling system was adopted for avoiding the heat load from undulator radiation. (3) The SGM-TRAIN was re-arranged to the optimum condition to the undulator light. (4) The free tuning program of the undulator gap and monochromator-control systems was introduced. Due to the reconstructions, we successfully improved the throughput intensity and energy resolution of the beamline to be able to investigate three-dimensional electronic-structures using 3D-ARPES.},
doi = {10.1063/1.2436129},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • A high-energy-resolution angle-resolved photoemission beamline in the vacuum-ultraviolet (VUV) region has been designed for a 750 MeV synchrotron light source UVSOR-II. The beamline equips an APPLE-II-type undulator with the horizontally/vertically linear and right/left circular polarizations, a modified Wadsworth-type monochromator and a high-resolution photoelectron analyzer. The monochromator covers the photon energy range of 6 - 40 eV. The energy resolution (hv/{delta}hv) and the photon flux on samples are expected to be 2 x 104 and 1012 photons/sec at 10 eV, 4 x 104 and 5 x 1011 photons/sec at 20 eV, and 6 x 104 and 1011 photons/sec at 40 eV,more » respectively. The beamline provides the high-resolution angle-resolved photoemission spectroscopy less than 1 meV in the whole VUV energy range.« less
  • 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 deg. 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 directlymore » 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 (h{nu}/{Delta}h{nu}) and photon flux of the monochromator are typically 1x10{sup 4} and 10{sup 12} photons/s, respectively, with a 100 {mu}m 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.« less
  • We have developed a soft x-ray time-resolved photoemission spectroscopy system using synchrotron radiation (SR) at SPring-8 BL07LSU and an ultrashort pulse laser system. Two-dimensional angle-resolved measurements were performed with a time-of-flight-type analyzer. The photoemission spectroscopy system is synchronized to light pulses of SR and laser using a time control unit. The performance of the instrument is demonstrated by mapping the band structure of a Si(111) crystal over the surface Brillouin zones and observing relaxation of the surface photo-voltage effect using the pump (laser) and probe (SR) method.
  • No abstract prepared.
  • We assess the evidence regarding the geometry of the Fermi surface in YBa{sub 2}Cu{sub 3}O{sub 6.9} obtained from angle-resolved photoemission and positron two-dimensional angular correlation of annihilation radiation experiments. A detailed picture of the Fermi-surface topology of this system appears to be emerging, based on a comparison of the above-mentioned experiments with each other and with local-density-approximation calculations, although whether the Fermi surface is a manifestation of true Fermi-liquid behavior is in dispute. Some implications of these results are discussed.