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BL17SU OUTLINE

Inquiry number

INS-0000000322

ABSTRACT

  BL17SU is aimed at advancing the spectroscopic studies for mainly solid state physics and materials science using high brilliant soft X-ray undulator radiation. Photoabsorption, photoemission and soft X-ray emission spectroscopies are adopted to investigate the electronic structure of various kinds of materials. The branched beamlines (a and b), which can be switched by the pre-mirror and used alternatively, are ready for use. In the a-branch, there are four experimental stations (A1, A2, Ac, and A3). In A1 station, the photon-ion merged-beam apparatus is installed on the slide-rail, and that enables us to open the A1 station for free space where users can connect their own instruments. In A2 station, materials science by high resolution photoemission spectroscopy is performed to study the electronic structure of various kinds of materials. In Ac station, there is a small free space where users can carry in their own instruments. In A3 station, the electronic structure of solid as well as biological samples is investigated using soft X-ray emission spectroscopy. In the b-branch, on the other hand, there are two experimental stations (B1 and Bc). In B1 station, the apparatus for the soft x-ray diffraction spectroscopy is installed to investigate the electronic structure of long-range ordered materials. In Bc station, a small free space where users can carry in their own apparatus is available with the use of focused soft x-ray beam.
Notes : A2 station and a soft X-ray emission spectrometer is out of public use.

AREA OF RESEARCH

  • Study of electronic states and band structures by means of photoemission spectroscopy --- A2 station
  • Spectroscopic photoemission low energy electron microscopy (SPELEEM) --- Ac station
    Observation of local electronic structure and magnetic domains by SPELEEM with the spatial resolution of about 22 nm using a soft x-ray beam.
    Variable 3 different imaging mode (real space imaging, reciprocal space imaging and energy dispersion mode), and 3 different excitation sources (high brilliant circularly polarized soft x-ray, electron beam and Hg mercury lamp) are available.
  • Study of electronic structure of liquid and liquid/solid interface by means of soft x-ray --- A3 station
    absorption and soft x-ray emission spectroscopy
  • Soft x-ray diffraction spectroscopy --- B1 station
    Soft x-ray diffraction to study the electronic structure of the ordered materials
  • Carry-in station --- Bc station
    Free space where users can carry in their own instruments. Focused soft x-ray beam is available.
    By using versatile photoemission electron microscope, electronic / magnetic states imaging (resolving power : better than 100 nm) and its dynamics measurements by pump-probe method are available.

KEYWORDS

  • Scientific field
    Solid state physics, Materials science, Surface science 
  • Equipment
    High resolution photoelectron spectrometer, High efficiency photon analyzer (HEPA2), Soft x-ray diffraction spectroscopy

SOURCE AND OPTICS

BL17SU_opt3s.jpg

Schematic view of BL17SU optics

  • X-rays at sample

    Energy range 0.3 ~ 1.8 keV
    Beam size < 0.1 x 0.1 mm2

EXPERIMENTAL STATIONS

  • a-branch

      There are four experimental stations (A1, A2, Ac, and A3) in a-branch. Soft X-rays from the multi-polarization mode undulator is monochromatized by using a high resolution monochromator, which is equipped with varied line spacing plane gratings and covers the photon energy range from 0.3 to 1.8 keV. The resolving power (E/ΔE) of the monochromator is estimated to be better than 10000. A1 station is located between the exit slit S2 and the re-focusing mirror. A2 and A3 stations are located at their optimum positions where the re-focused photon beams with small spot size (smaller than 10 µm in vertical) are available. Ac station is located between A2 and A3 stations. The re-focused photon beam is available at this Ac station.

  • b-branch

    There are two experimental stations (B1 and Bc) in b-branch. Synchrotron radiation is monochromatized by using an entrance slitless high resolution monochromator, which is equipped with varied line spacing plane gratings. The available energy range and the resolving power are estimated to be comparable with those for a-branch. Both of B1 and Bc stations have specific re-focusing mirror systems which realize small spot size on the sample. 

  • X-rays at sample
    Energy range 0.3 ~ 1.8 keV
    Linearly polarized or Circularly polarized Degree of polarization changes depending on the operational condition and also the energy region
    Photon flux > 1011 photon/s
    Energy resolution E/Δ E > 104
  • Standard equipments
  • High energy-resolution electron energy analyzer (A2 station) 
    • SCIENTA SES 2002
    • Energy resolution (at 2 eV pass energy) : < 2 meV
  • Soft X-ray emission spectrometer (A3 station) *Out of public use
    • Typical energy range : 0.2 ~ 1.0 keV
    • Energy resolution : > 1000
  • Parameters of spherical mirrors and gratings
    Branch
    a-branch
    b-branch
    Deviation angle (deg)
    177.0
    175.2
    169.0
    176.0
    173.8
    Spherical
    Mirror
    Mirror
    M21a
    M22a
    M23a
    M21b
    M22b
    Radius (mm)
    332,971
    217,497
    98,213
    1,012,637
    646,554
    VLSPG
    Grating
    G1a
    G2a
    G1a
    G2a
    G2a
    G1b
    G2b
    G1b
    G2b
    Groove (/mm)
    600
    1200
    600
    1200
    1200
    600
    1200
    600
    1200
    Energy range (keV)
    0.7-1.8
    1.3-1.8
    0.3-0.9
    0.5-1.4
    0.2-0.3
    0.4-1
    0.8-1.8
    0.2-0.5
    0.4-0.9

PUBLICATION SEARCH

* Sorry, some parts of results are displayed using Japanese characters.

BL17SU PUBLICATION SEARCH

 

CONTACT INFORMATION

Please note that each e-mail address is followed by "@spring8.or.jp."

Masaki OURA
SPring-8 / RIKEN
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148
Phone : +81-(0)791-58-2933
Fax : +81-(0)791-58-2934
e-mail : oura

Takuo OHKOCHI
SPring-8 / JASRI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0833
Fax : +81-(0)791-58-0830
e-mail : o-taku

Last modified 2019-04-09 14:38
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