BL23SU OUTLINE
Inquiry number
INS-0000000364
ABSTRACT
BL23SU is a soft X-ray undulator beamline of Japan Atomic Energy Agency (JAEA). It is used for research areas such as fundamental heavy-element research and environment and energy materials. The experimental stations are located at the experimental hall and the RI building. For now, users can make use of the Biophysical spectroscopy station within QST’s jurisdiction.
AREA OF RESEARCH
- Surface chemistry with supersonic molecular beam
- Biophysical spectroscopy
- Photoelectron spectroscopy
- Magnetic circular dichroism
KEYWORDS
- Scientific field
Surface chemistry, Chemical reaction dynamics, Real-time in-situ photoemission spectroscopy (Station 1)
DNA damages, Transient radical species, Photon stimulated desorbed ions (Station 2)
Photoelectron spectroscopy, Strongly-correlated electron system, Uranium compounds (Station 3)
MCD, XAS, Strongly correlated electron system, Magnetic property (Station 4)
SOURCE AND OPTICS
- Light source
Twin helical undulators (THU), which produce circularly-polarized soft X-ray synchrotron radiation, were used as a light source. Polarization of light can be switched with the repetition frequency of 10 Hz by the kicker magnet.
- Schematic view of beamline and monochromator system
The main optics is a varied - line - spacing plane grating type (VLSPG) monochromator. This consists of an entrance slit, spherical mirrors, varied-line-spacing plane gratings, an exit slit, a post-focusing mirror, and refocusing toroidal mirrors. The soft X-rays are guided over 120 m from the undulator, crossing the two areas (experimental hall and RI hall).
| Undulator period | 75.2 mm |
| Number of periods | 17 |
- X-rays at sample
Energy Range 0.4 ~ 1.8 keV Energy resolution E/ΔE > 10000 Photon flux 1012 ph/s/0.01%b.w. at 700 eV Beam size < 200 µm in diameter
Fig. 1 Schematic view of BL23SU and the monochromator system
| Optics : Distance from the source |
Optical element | Function |
| 40 m | Cylindrical mirror (Mv) | Vertical focusing at the entrance slit |
| 42.5 m | Cylindrical mirror (Mh) | Deflection and horizontal focusing |
| 50 m | Entrance slit (S1) | |
| 60.1 m | Spherical mirror (M1, M2) | |
| 61.91 m | Constant deviation monochromator with varied-space plane gratings (VLSPG) | Monochromatizarion |
| 71.91 m | Exit slit (S2) | |
| 73.91 m | Cylindrical mirror (M3) | Post focus |
| 114 m | Troidal mirror (M4) | Refocus |
EXPERIMENTAL STATIONS
- Surface chemistry experimental station
- Biophysical spectroscopy station
- Photoelectron spectroscopy station
- MCD station
PUBLICATION SEARCH
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CONTACT INFORMATION
Please note that each e-mail address is followed by "@spring8.or.jp."
Shin-ichi FUJIMORI
Japan Atomic Energy Agency, Sector of Nuclear Science Research, Materials Sciences Research Center
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148
Phone : +81-(0)791-58-0820
Fax : +81-(0)-791-58-2620
e-mail : Fujimori