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 B2). 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 B2 station, the end-station for surface science, which is equipped with the high-resolution electron energy analyzer and the soft x-ray emission spectrometer, is ready for use. By using this apparatus, we can investigate the element specific and chemical specific electronic structure of the surface adsorbates and interfaces.
AREA OF RESEARCH
- High resolution photoemission spectroscopy --- A2 station
Angle-resolved photoemission (ARPES) study using soft X-rays to observe 'bulk' band structure
In situ ARPES measurement on strongly-correlated transition-metal oxide thin films fabricated by laser MBE method - Spectroscopic photoemission low energy electron microscopy --- Ac station
SPELEEM has the top of the world standard spatial resolving power.
Variable 3 different imaging modes (real space imaging, reciprocal space imaging and energy dispersion mode), and 3 different excitation sources (highly brilliant circularly polarized soft x-ray, electron beam and Hg mercury lamp) are available. - Soft X-ray emission spectroscopy for liquid and biological samples --- A3 station
Study of the electronic structure of liquid and biological samples by soft X-ray emission spectroscopy - Soft x-ray diffraction spectroscopy --- B1 station
Soft x-ray diffraction on the ordered materials to study the electronic structure - Surface science --- B2 station
Soft x-ray spectroscopy to study the surface adsorbates and interfaces
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
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.
- High resolution soft x-ray angle-resolved photoemission spectrometer (A2 station)
- Spectroscopic photoemission low energy electron microscope (Ac station)
- High efficiency photon analyzer (A3 station)
- b-branch
There are two experimental stations (B1 and B2) 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 B2 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, B2 station)
- SCIENTA SES 2002
- Energy resolution (at 2 eV pass energy) : < 2 meV
- Soft X-ray emission spectrometer (A3 station, B2 station)
- Typical energy range : 0.2 ~ 1.0 keV
- Energy resolution : > 1000
- Parameters of spherical mirrors and gratings
Brancha-branchb-branchDeviation angle (deg)177.0175.2169.0176.0173.8SphericalMirrorMirrorM21aM22aM23aM21bM22bRadius (mm)332,971217,49798,2131,012,637646,554VLSPGGratingG1aG2aG1aG2aG2aG1bG2bG1bG2bGroove (/mm)60012006001200120060012006001200Energy range (keV)0.7-1.81.3-1.80.3-0.90.5-1.40.2-0.30.4-10.8-1.80.2-0.50.4-0.9
PUBLICATION SEARCH
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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
Haruhiko OHASHI
SPring-8 / JASRI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0832
Fax : +81-(0)791-58-0830
e-mail : hohashi
Masato KOTSUGI
SPring-8 / JASRI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0831
Fax : +81-(0)791-58-0830
e-mail : kotsugi