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Beamlines in 2017

  UVSOR is one of the highest-brilliance light sources in the extreme-ultraviolet region among the synchrotron radiation facilities with electron energies of less than 1 GeV. The natural emittance of the UVSOR-III storage ring is as low as 17.5 nm-rad after the successful completion of the storage ring upgrade project (the UVSOR-III project) in 2012..
  Eight bending magnets and five insertion devices are available as synchrotron light sources at UVSOR. As of 2016 there are a total of fourteen operational beamlines, which are classified into two categories. Eleven of them are the so-called “Open beamlines”, which are open to scientists from universities and research institutes belonging to the government, public organizations, private enterprises and also those from foreign countries. The remaining three beamlines are the “In-house beamlines”, and are dedicated to the use of research groups within Institute for Molecular Science (IMS).
  There is one soft X-ray station equipped with a double-crystal monochromator, seven extreme ultraviolet and soft X-ray stations with grazing incidence monochromators, three vacuum ultraviolet (VUV) stations with normal incidence monochromators, two infrared (IR) stations equipped with Fourier-Transform interferometers, and one free electron laser beamline with no monochromator, as shown in the appended table (next page) for all available beamlines at UVSOR in 2017. The details of the updates for several beamlines are the followings.
  BL2A equipped with a double-crystal monochromator, where users can use the highest energy photons in UVSOR (~4 keV), has been used mainly for photoabsorption spectroscopy. Since there are users who want to evaluate the sample surface, a new chamber for X-ray photoemission spectroscopy (XPS) has been attached to BL2A during the shutdown of 2017. XPS measurement is now available.
  In BL3B, a new endstation chamber has been installed during the shutdown of 2017. High efficiency VUV emission spectroscopy will be available soon.
  BL5U has been officially opened for users from 2016 as high energy resolution angle-resolved photoemission spectroscopy (ARPES) beamline. It became one of the most popular beamline in UVSOR, whose beamtime requests are about three times more than the beamtime. Using a new mirror located close to the sample position, the beam spot size is successfully focused to ~50 μm, which make users possible to perform measurements on small samples or inhomogeneous samples. Spin-resolved ARPES will be developed and installed soon.
  In BL6U, which is one of the in-house beamlines, the latest version of ARPES analyzer was installed (MB Scientific AB, A-1 analyzer Lens#5). Manipulator will be modified so that a mesh can be set in front of the sample and the sample can be biased voltages. By applying bias voltages to the sample, the wider acceptance angle (~ 60 deg.) with hν = 40-60 eV will be available.
  UVSOR is now planning to introduce so-called “Momentum microscope (MM)”, which is an electronic spectroscopy with both the real space and momentum space resolution. It will be installed to the area of BL2A and BL2B. BL2B will be shut down from FY2018 and the whole BL2A, including the grating and endstation, will move to BL8A. User operation of BL8A will start from summer 2018. New normal incident monochromator beamline for MM is designed with two gratings which cover the energy of photon from 6 to 60 eV. Construction of beamline will start from FY2018 and MM analyzer will be installed in FY2019. Tender process for both the beamline and MM analyzer is now in progress.
  All users are required to refer to the beamline manuals and the UVSOR guidebook (the latest revision in PDF format uploaded on the UVSOR web site in June 2010), on the occasion of conducting the actual experimental procedures. Those wishing to use the open and in-house beamlines are recommended to contact the appropriate beamline master (see next page). For updated information on UVSOR, please see http://www.uvsor.ims.ac.jp


UVSOR Synchrotron Facility, Institute for Molecular Science
Kiyohisa TANAKA

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